Omnivorous leafroller control. Biology: This .

Omnivorous leafroller control. Applying Control Materials Treat for leafroller at bloom if the vineyard has a history of this pest or if a serious infestation occurred in the previous season. 09 - 0. Monterey Garden Insect Spray is a broad spectrum insecticide that contains Spinosad , which is derived through fermentation of a naturally-occurring soil bacterium. Since the insects are paralyzed, they may stay on the plants and be mistaken for live insects; always check 2-3 days after spraying to evaluate Dipel DF contains the bacteria Bacillus thuringiensis v. The traps are used to establish a biofix—an Archips purpuranus, the omnivorous leafroller moth, is a species of moth of the family Tortricidae. Cutworms, typically brown or gray and about 1 inch long, also contribute to grapevine damage. This pheromone-based mating disruption product provides alternative pest control for Omnivorous Leafroller (OLR) that is easy to hang and lasts all season. This translates to CT product exposure levels (defined below) of about 800 to 1,500 ppm-h. Omnivorous leafroller (Tortricidae) larvae (caterpillars) mostly feed on foliage within nests they build by tying leaves or leaves and fruit together with silk webbing. These and other leafroller species pictured here side-by-side occur on various ornamental plants in California. Fig. Weed control and site location play an important role in preventing infestations of omnivorous leafroller. Depending on the climatic conditions, omnivorous leafrollers Dec 11, 2022 · Leafrollers One of the most common and damaging leaf-rolling caterpillars is the omnivorous leafroller. Spinosad works on the insects' nervous system, causing paralysis and death in 1-2 days. Destroy prunings of older infested wood to reduce pest sources. At harvest check table grapes for grape leaffolder damage to assess your management program and prepare for next year. Adults are buff-colored moths with wingspans of 0. This is a pest for many fruit trees, as is the orange tortrix (Argyrotaenia franciscana). 5–11 mm for males and 10. See full list on solutionsstores. 7–95. Apply AVAUNT insecticide at 5. Mouthparts that extend in front of the head give the appearance of a beak. There can be 4-6 generations in a year, depending on the weather. The biology and management of leafrollers differs from that of other caterpillarlike insects. Omnivorous leafroller can be a significant pest. Omnivorous leafroller is a pest of plums primarily in the San Joaquin Valley. i. This endoparasite lays one to several eggs on the head or thorax of host larvae. Omnivorous leafroller overwinters as immature larvae in mummy fruit and does not enter dormancy. 1993 The omnivorous leafroller can cause serious damage in vineyards in California, USA (Bentley et al. 87: Platynota leafrollers. n. In contrast, the Omnivorous Leafroller caterpillar is green and approximately 1/2 inch long, primarily feeding on grape leaves. However, seldom does mortality from these parasites exceed 10 percent. Other leafrollers include the obliquebanded leafroller, Choristoneura rosaceana, and the omnivorous leafroller, Platynota stultana, which are serious problems on fruit trees. Bacillus thuringiensis subsp. NoMate® OLR Spiral is intended to prevent damage to grapes, kiwi or tree fruit caused by omnivorous leafroller. Overwintered larvae typically emerge in late winter/ early spring and the first adults may be seen soon after. These pests have now moved into California and can be a major pest of stone fruit, grapes and other fruit crops. Credit: Jack Kelly Clark Identification Correctly identify the cause of damage before taking action. Aug 12, 2025 · The Grape Berry Moth caterpillar, a brown pest measuring around 1/4 inch, consumes grape buds and fruit. As a result, a return to biological control is helping to restore balance. The tubercles on orange tortrix can match the color of the rest of the body and are brown, greenish, orange, or yellow but not white. Eggs hatch in 5 days and larvae tie two young leaves together to form nest in which they feed. /acre) as a foliar spray using properly calibrated ground spray equipment for control of Omnivorous Leafroller. Over winters in larval stage in mummified berries, in weeds and other trash. [2] The length of the forewings is 8. Learn about their lifecycle, the plants they affect, and effective management strategies. 7% and the second instar was the stage least susceptible to low-temperature storage. Read about Pest & Disease Control for Raspberry Plants in this Stark Bro's Growing Guide article. Otherwise, monitor to determine the need for treatment. 4 The survey showed that obliquebanded leafroller is the most common species in Utah, followed by fruittree leafroller. These tortricid moths lay their eggs on various fruit, nut, and ornamental trees. A significant reduction in survival Nov 12, 2024 · The omnivorous leafroller is particularly notable in inland valleys, with larvae measuring up to 1/2 inch in a mix of colors. 5 is a broad-spectrum Insect Growth Regulator (IGR) botanical insecticide. We conducted preliminary experiments Omnivorous leafroller Omnivorous leafroller (Platynota stultana) is primarily a pest of peaches in the San Joaquin Valley. Preservation of natural enemy populations is an important part of keeping leafroller numbers low. 5 mm for females. Cutworms, dull-colored caterpillars, grow to about 2 inches long and are problematic in the spring. 6 inch (1. Following the test, both fumigated and control larvae were transferred to an agar-based semi-synthetic diet in 30 ml plastic cups (1 larva per cup) and held at 27 ° 1°C. Read about Pest & Disease Control for Grape Vines in this Stark Bro's Growing Guide article. Find the latest published documents for omnivorous leafroller, Related hot topics, top authors, the most cited documents, and related journals Monitoring Strategy: Monitor omnivorous leafroller adults with a minimum of 2 traps per block first placed in orchards at 5 to 6 feet high in the canopy around February 15 to 20. The reason for this can be found in the particular strain of Btk chosen for Deliver – it contains an especially high concentration of Cry1Ac insecticidal protein. Feb 1, 1999 · Abstract Low temperature storage combined with sulfur dioxide slow release pads caused 100% mortality of omnivorous leafroller, Platynota stultana Walshingham, 2nd instar (the least susceptible stage to low temperature storage) after 3 wk of exposure in table grapes, Vitis vinifera L. Apple pandemis, light brown apple moth, and orange tortrix occur primarily in coastal areas where they are pests on both blackberries and raspberries while omnivorous leafroller is a pest of these crops primarily in the Biological Control A number of parasites, including species of Macrocentrus, Cotesia (Apanteles), and Exochus, attack omnivorous leafroller larvae. Jul 20, 2022 · Leafroller insects can cause significant damage to garden plants. Exposures of 2–5 wk resulted in 0–6. Use the information obtained from trap catches to schedule control actions when used in conjunction with degree-day calculations. Once a targeted insect (in its larval or nymph form) larvae or nymph comes into contact with or ingests Neemix 4. Fortunately, omnivorous leafroller is controlled with the use of selective pesticides. Neemix 4. Jan 1, 1992 · One cage was left unexposed (control) outside the test area. Temperatures in packed grape clusters decreased from ambient to 2°C within ≈2 d after placement in storage. Temperatures in packed grape clusters decreased from ambient to 2°C within ≈2 d after placement in storage Mating Disruption for Omnivorous Leafroller The unique mode of action used by CheckMate ® OLR reduces damage and helps fight conventional insecticide resistance. Erynnia tortricis parasitizes larvae and pupae in various lepidopterous families including amorbia, codling moth, obliquebanded leafroller, omnivorous leafroller, oriental fruit moth, peach twig borer, pink bollworm, and sunflower moth. C) after the first biofix. These can include the use of insecticides, biological control (utilizing natural predators or parasites), and cultural practices like pruning and removing infested plant material. The omnivorous leafroller caterpillar’s body color ranges from cream to brown, and its head capsules range from light brown to black. Variegated leafroller, Platynota flavedana Clemens; omnivorous leafroller, Platynota stultana Walsingham; tufted apple bud moth, Platynota idaeusalis (Walker), Tortricidae, LEPIDOPTERA A, Variegated leafroller moth. 2% for nonexposed immatures and 14. It is also an occasional pest of citrus in California (Grafton Latin Name: Platynota stultana Latin Family Name: Tortricidae Common Name: Omnivorous Leafroller Other Names: N/A Origin: It is believed that this moth is native to Arizona, but was introduced into California from Mexico with infested produce. A significant reduction in survival Additionally, you can use this leafroller control product at other times of the year if needed. Larvae are light colored with dark brown or black heads. Omnivorous leafroller. The fore wing has a dark brown inner half and a yellowish-brown outer half. Rapid Shoot Growth Early in rapid shoot growth, start monitoring for webbing Oct 19, 2024 · Control: Managing leafroller infestations often requires both chemical and non-chemical methods. It occurs in the Sacramento Valley but seldom causes damage. Authors: W. Identify, treat, and control unwanted Treat for omnivorous or obliquebanded leafroller at bloom if the vineyard has a history of this pest or if a serious infestation occurred in the previous season. Checkmate® OLR is suitable for organic production and is an ecologically friendly, effective Nov 16, 2021 · Low temperature storage combined with sulfur dioxide slow release pads for quarantine control of omnivorous leafroller Platynota stultana (Lepidoptera: Tortricidae). Check the traps at least one to two times per week until the first consistent moth catch (the biofix date). Larvae pupate inside a webbed shelter. They Oct 7, 2020 · If you've noticed your leaves curling or being rolled, you may have a leafroller caterpillar problem. , 2000d). Usually treatments applied for grapeleaf skeletonizer and omnivorous leafroller will also control grape leaffolder. Eggs and first–fifth instars of omnivorous leafroller, Platynota stultana Walshingham, had a mean percentage survival to the adult stage of 60. Deploy as part of an Integrated Pest Management (IPM) program. The main damage to grapes is caused by bunch-rot organisms which enter through larval feeding holes in the skin, and may result in at least 25% yield loss (Lynn, 1969). Omnivorous leafroller larvae are light-colored caterpillars with dark brown or black heads. Inside the rolled leaf, they will feed and eventually pupate. Moths emerge in spring and lay egg masses on leaves. It is found in Mexico and the United States (California, Arizona, Texas, Florida and Hawaii). The larvae are cream colored with black or brown head capsules and resemble other leafrollers, except that they have white tubercles at the base of each bristle along the top of the abdomen. DIRECTIONS FOR USE It is a violation of Federal law to use this product in a manner inconsistent with its labeling. Easy to deploy, the dispensers release pheromone throughout the orchard and are compatible with all integrated pest management (IPM) tools. Remove dried grape clusters on vines and disc weeds and clusters where orange tortrix or omnivorous leafroller is a problem. Get expert advice from a comprehensive guide. 5 it interferes with its ability to molt. Use to for organic control of caterpillars and borers on fruits, citrus, tropical fruits, vegetables, grains, bulbs, flowers, herbs, turf, ornamental trees and shrubs. 7% survival, and a 6-wk exposure resulted in <1% survival of all stages tested. Omnivorous Leafroller Redbanded Leafroller Obliquebanded & Pandemis Leafrollers Mealybugs Midges Mole Crickets Mosquito Control Navel Orangeworm Orange Tortrix Oriental Fruit Moth Parsleyworm, aka Celeryworm, aka Carrot Caterpillar Plant Parasitic Nematodes Pecan Nut Casebearer Psyllids Public Health Pests Root Aphids Root Maggots Russet Mites Disruption of Pheromone Communication for Control of the Omnivorous Leafroller in Peaches Shorey, H. The omnivorous leafroller (Platynota stultana) is a moth of the family Tortricidae. The following article will help with controlling these pests and minimize further problems. The larvae create protective tubes out of leaves, hence the name leafroller, and use webbing to hold them together. Apple pamdemis (Pandemis pyrusana) joins the group as well for fruit trees, especially in coastal areas. Feb 1, 1999 · Low temperature storage combined with sulfur dioxide slow release pads caused 100% mortality of omnivorous leafroller, Platynota stultana Walshingham, 2nd instar (the least susceptible stage to low temperature storage) after 3 wk of exposure in table grapes, Vitis vinifera L. Omnivorous leafroller, orange tortrix, and light brown apple moth feed on leaves, flowers, and developing berries, but their primary damage is feeding on fruit which enables rot organisms to enter fruit. Biology: This Omnivorous leafroller (Platynota stultana Walsingham) Identification. Biological Control More than 10 species of parasites have been recorded from omnivorous leafroller larvae. 3% for immatures exposed to 1 wk at 0–1°C. 75 inch. For blocks over 20 acres use an additional 1 trap per 20 acres. Fruittree leafroller and omnivorous leafroller are the most common species infesting nurseries. When omnivorous leafroller larvae are disturbed, they wriggle and drop attached to a silken thread. It has since spread throughout California and from there to Texas, along the Gulf Coast to Florida, and north along the Atlantic States. General predators such as lacewings, Phytocoris bugs, assassin bugs, and minute pirate bugs may feed on eggs and larvae. Treatments may occasionally be necessary. Mar 14, 2022 · The fruit tree leafroller is prevalent in landscapes, valleys, and orchards in California. Aug 23, 2025 · Grapevines are used as food plants by caterpillars of several Lepidoptera species, including monophagous species, grape leaffolder, western grapeleaf skeletonizer, omnivorous leafroller, orange tortrix, and light brown apple moth. They grow up to 3/5 inch long and resemble larvae of omnivorous leafroller. Omnivorous leafrollers can be found in orchards in the spring, but the majority of damage occurs during the summer. J. Day Authors Info & Affiliations Publication: PlantwisePlus Knowledge Bank External factsheets Omnivorous looper, western avocado leafroller (amorbia), and (least frequently) orange tortrix are sporadic pests in avocado. (1985) recommended the importation and augmentation of natural enemies of omnivorous leafroller for the improvement of grape IPM in the San Joaquin Valley. Abdominal segments may have a greenish brown tinge. 8. Leafrollers can be a headache for any orchardist or hobby fruit grower. The larvae are polyphagous and have been recorded feeding on the foliage of Omnivorous Leafroller (Archips purpurana). Read here to get additional information. When mature, they are about 0. kurstaki bacterium biocontrol agents biological control organisms common lambsquarters curly dock Exochus factsheets fungus horseweed lacewings leafhopper assassin bug leafhoppers little mallow minute pirate bugs omnivorous leafroller pest arthropods pest insects spined assassin bug biocontrol sex attractant traps Bacillus Bacillus thuringiensis subsp. Overall, leafrollers pose significant challenges in agricultural practices, necessitating effective control strategies. 0 to 6. Insecticide treatments targeting first, or second-generation larvae are typically the best control measures fo When 500 D° have accumulated, egg hatch starts, and it is time to sample clusters. The adult stage of the omnivorous leafroller is a small moth approximately ½ to 3/5 inch long. 5 to 0. Although this product kills only immature stages (larvae or nymphs), treated larvae may die as pupae. kurstaki or Btk. Cultivate ideas and grow your knowledge. The traps are used to establish a biofix—an Sep 17, 2020 · This omnivorous leafroller (Platynota stultana) can be an occasional and sometimes serious pest of fruit and vegetable crops. com Control Omnivorous Leafroller (OLR) with CheckMate® OLR Dispenser. 11 lb a. Orange tortrix (Argyrotaenia franciscana) Pest description and damage The orange tortrix is a pest of many woody plants, including holly. Track your progress through the year using this form. Mortality evaluations were made at the time of transfer to the diet cups and at 1, 2, and 4 days posttreatment. B, Platynota sp. Economically important hosts include avocado, beans, celery Dec 11, 2022 · Leafrollers One of the most common and damaging leaf-rolling caterpillars is the omnivorous leafroller. It is known from Mexico. kurstaki bacterium biocontrol agents biological control organisms common lambsquarters curly dock Exochus factsheets horseweed lacewings little mallow minute pirate bugs omnivorous leafroller pest arthropods pest insects Phytocoris bugs predaceous insects predacious insects biocontrol sex attractant traps The redbanded leafroller became a major pest during the 1940's. Discover organic and chemical control methods, prevention tips, and resources for a healthy and pest-resistant garden. 5 inch in length at maturity. Damage in the home garden is usually light and sporadic. 0 ounces per acre (0. Aug 27, 2025 · Other pests of primary concern include Amorbia (Western Avocado Leafroller), Avocado Brown Mite, Avocado Thrips, Greenhouse Thrips, Omnivorous Looper Persea, Tree dropping leaves and becoming defoliated, causing sunburn damage to exposed bark and fruit, and mites developing circular chlorotic to brown spots. Latin Name: Platynota stultana Latin Family Name: Tortricidae Common Name: Omnivorous Leafroller Other Names: N/A Origin: It is believed that this moth is native to Arizona, but was introduced into California from Mexico with infested produce. Adults of the overwintering generation emerge in March. Apple pandemic, orange tortrix, and light brown apple leafrollers are the pests of the cool coastal climates. Only seven European leafroller moths were detected in 2014. Natural Guard® Caterpillar Killer Spray w/BT for caterpillars, fall webworm and omnivorous leafroller. 5 cm) long and have two slightly raised, oblong, whitish spots on Nov 16, 2021 · Low temperature storage combined with sulfur dioxide slow release pads for quarantine control of omnivorous leafroller Platynota stultana (Lepidoptera: Tortricidae). The product functions by disrupting the mating communication between the sexes of the adult moths. Various DAMAGE: The omnivorous leafroller is a frequent pest of citrus nurseries in Arizona, but rarely reach damaging levels on mature trees. The feeding caterpillars typically roll or twist individual As the name implies, it feeds on a number of plants including fruit trees, citrus, grapes, garden vegetables, ornamentals, and weeds. The grapes are refumigated weekly during cold storage with 1,000 to 5,000 ppm S02. 5–12. When mature they are about 0. There is not enough research in kiwifruit regarding monitoring; therefore for omnivorous leafroller, refer to the monitoring information used in grapes. Sulfur Low Temperature Storage Combined with Sulfur Dioxide Slow Release Pads for Quarantine Control of Omnivorous Leafroller Platynota sultana (Lepidoptera: Tortricidae). It is to be used for control of the omnivorous leafroller (Platynota stulta Fig. Predators such as lacewings, minute pirate bugs and spiders feed on young omnivorous leafroller larvae. However, seldom does mortality from these parasites exceed 10%. No omnivorous or pandemis leafrollers were detected. Regular monitoring each season is important so that prompt action can be taken if damaging populations develop. caterpillar from poinsettia and chrysanthemum. Your assistance is needed in monitoring for this pest both indoors and outdoors in Pennsylvania. Adults are on wing from June to July in one generation per year in most of the range. Bentley, K. Healthy trees can tolerate some loss of chewed foliage and blossoms. Omnivorous Leafroller Platynota stultana Omnivorous Leafrollers are natives of north-western Mexico and the Southwestern US, principally Arizona and Texas. It is found in most of eastern North America. Omnivorous leafrollers overwinter as immature larvae in mummy fruit and do not enter dormancy. It has been recorded from California, Arizona, Hawaii, Texas, Florida, and Pennsylvania. Includes photos, videos, county distribution maps, and sightings in Minnesota. Apr 22, 2015 · Guidelines recommend that growers with a history of damage from omnivorous leafroller, grape leaffolder and western grapeleaf skeletonizer as well as orange tortrix or light brown apple moth in coastal regions plan to treat for these caterpillars once the vines begin flowering. The larvae can skeletonize leaves by feeding on all parts of the leaf. Chewed and rolled leaf. Additionally, it repels and deters feeding in all the However, in orchards using mating disruption and soft chemicals for pest control, the impact of parasitoids on leafroller populations can increase dramatically. Organocide The decline of bee populations is partly due to the overuse of chemical pesticides. Furthermore, omnivorous leafroller moths may develop on plants outside and infest vineyards. 7 Hi-Yield® Vegetable & Ornamental Insect Control for webworms, husk fly and leafrollers. 5 cm) long and have two slightly raised, oblong, whitish spots on Description of the Pest Four leafrollers in the family Tortricidae, apple pandemis, light brown apple moth, omnivorous leafroller, and orange tortrix, are pests of caneberries. Omnivorous Leafroller Adult is bell shaped, blackish gray snout-like mouthparts, forewings dark rusty brown with tan tips. 5–54. In peaches, pheromone traps are used to monitor adult emergence and flights of San Jose scale and certain moths including oriental fruit moth, omnivorous leafroller, peach twig borer and obliquebanded leafroller. For the obliquebanded Sep 12, 2018 · The omnivorous leafroller can cause serious damage in California's Central Valley and coastal vineyards. Feb 14, 2013 · The omnivorous leafroller is a small moth in its adult stage that is bell-shaped with a snout-like mouthpart and causes damage to several crops, including grapes. Orange tortrix larvae feed inside nests spun around plant parts. Usually, no control measures are needed or recommended. In vineyards with a history of branch and twig borers, examine old pruning scars and dead parts of vines for brown frass and wood dust. Select 10 clusters from 20 marked vines and examine clusters for evidence of larval infestation. Dec 1, 2012 · Alternatives to Insecticides You can control many insects on your grape vines without insecticides. 5 cm) long and have two slightly raised, oblong, whitish spots on the upper surface of each abdominal segment. Similarly, omnivorous and oblique banded leafrollers dominate warm valleys and coastal climates of California. R. Abstract Eggs and first–fifth instars of omnivorous leafroller, Platynota stultana Walshingham, had a mean percentage survival to the adult stage of 60. This uniquely powerful product is up to 5 times as potent – pound for pound – as conventional Btk products. Find related pest control products, articles and questions on Omnivorous Leafroller Other leafrollers include the omnivorous leafroller (Platynota stultana). Flaherty et al. Additional Product Information INSECT KILLER - This pest control is great for use on redhumped caterpillars, cabbage looper, diamondback moth, omnivorous leafroller, tent caterpillar, and many more. Organocide is one such product that helps deal with insects, mites, and fungus. caterpillar. Try pulling out surrounding weeds to control leafhoppers, orange tortrix and omnivorous leafroller. Platynota stultana (Lepidoptera: Tortricidae) The omnivorous leafroller has recently been detected and confirmed in a greenhouse in Pennsylvania. Depending on the climatic conditions, omnivorous leafrollers Biological Pest Control More than 10 species of parasites have been recorded from omnivorous leafroller larvae. Spring insecticide application targeting thrips probably prevent omnivorous leafroller from becoming troublesome on bearing trees. Biology: This Find related pest control products, articles and questions on Omnivorous Leafroller (larvae) Aug 2, 2023 · Unlock the secrets to identifying, preventing, and controlling leaf rollers in your garden with this comprehensive guide. The larvae of the orange tortrix are light cream to green with light brown heads and are up to 0. This protective structure makes it hard to control them with The major distinguishing characteristic between orange tortrix and omnivorous leafroller caterpillars is that the small mounds at the base of the bristles on the side and back of the omnivorous leafroller are white, whereas on the orange tortrix they are not. It also attacks numerous fruit and nut trees including almond, apple, apricot, caneberries, cherry, citrus, pear, plum, prune, quince, and walnut. It occurs in the Sacramento Valley, but seldom causes damage. Image courtesy of Elizabeth Beers, Washington State University Tree Fruit Research and Extension Center, Wenatchee, WA. Grape leaffolder larvae when disturbed wriggle vigorously and drop to the ground generally without a silken thread. PROTECTS VEGETABLES, FRUITS, NUTS, SHADE TREES & ORNAMENTALS - Thuricide is designed for use on a variety of plants including almonds, apples, pears, cherries, grapes, oranges, celery, broccoli Supplement to UC IPM Pest Management Guidelines: Citrus These practices are recommended for a monitoring-based IPM program that reduces water and air quality problems related to pesticide use. A profile of this insect. See Appendix J, Beneficial Insects, Mites, and Spiders. In nectarines, pheromone traps are used to monitor adult emergence and flights of San Jose scale and certain moths including oriental fruit moth, omnivorous leafroller, peach twig borer and obliquebanded leafroller. Throughout the season, watch for the presence of leafroller larvae while monitoring. Use selective pesticides that Grape leaffolder and western grapeleaf skeletonizer feed on foliage and heavy populations can lead to defoliation. They feeds on apple, cherry, plum, peach, grape, small fruits, vegetable crops, ornamentals, and some weeds. Cry1Ac is As the name implies, it feeds on a number of plants including fruit trees, citrus, grapes, garden vegetables, ornamentals, and weeds. Insecticide treatments targeting 1st or 2nd generation larvae are typically the best way to control Omnivorous Leafroller populations for the entire growing season. Insecticides used for controlling grape omnivorous leafroller in vineyards are presented in Appendix K, Insecticides Registered for Use in Vineyards. Omnivorous leafrollers are more common in interior valleys and Southern California mountain orchards, especially those next to vineyards, than in orchards Control Omnivorous Leafroller (OLR) with CheckMate® OLR Dispenser. Jan 29, 2023 · how to identify and control leaf rollers and caterpillars in your garden. However, on omnivorous leafroller the small tubercles (mounds) at the base of the bristles on the side and back are chalky white. Irrigate regularly to avoid water stress and reduce dust to control spider mites. Deliver is an organic bioinsecticide with the active ingredient Bacillus thuringiensis kurstaki . Omnivorous leafroller and orange tortrix feed on leaves, flowers, and developing berries, but their primary damage is feeding on fruit which enables rot organisms to enter fruit. C, Pupa of Platynota sp. Table grapes are routinely fumigated with sulfur dioxide (S02) at 5,000 to 10,000 ppm for 20 to 30 min at ambient temperature or during cooling to control postharvest decay in storage. However, in instances where large leafroller populations have occurred on mature trees, damage can stress trees causing them to Regular field monitoring will help to detect potential problems with this pest. 4re p9i 9fvt yfq4br i9vu hannlf 44wzac kau ga1p hh