GRAPES

Recommendations for Use For Control of Worm Pests in Grapes

Including: Omnivorous Leafroller, Grapeleaf Skeletonizer, Orange Tortrix, Grape Leaffolder and Saltmarsh Caterpillar

GENERAL INFORMATION

MVP®II Bioinsecticide belongs to a new class of bioinsecticides based on Mycogen's Cellcap Encapsulation System with increased residual activity and higher potency. The biotoxin active ingredient in MVP II is highly effective against several caterpillar pests, but has little or no toxicity to beneficial insects and mammals.

Mode of Action: MVP II contains a specially selected delta endotoxin of Bacillus thuringiensis variety kurstaki, bioencapsulated in killed Pseudomonas fluorescens. The delta endotoxin is a potent insect stomach poison and must be eaten by the target insect to be effective. Once eaten, the biotoxin stops worm feeding and disrupts the larva's digestive system, resulting in starvation and death. MVP II is most effective against young 1st and 2nd instar worms.

CellCap Encapsulation System: MVP II utilizes the CellCap Encapsulation System, a patented process which improves its field performance and shelf life. Conventional Bts degrade rapidly on the leaf surface due to adverse effects of heat, sunlight and other environmental factors. This degradation renders the biotoxin ineffective against feeding larvae. MVP II uses biological microcapsules to protect the biotoxins from environmental degradation. As a result, MVP II remains active longer on the grape leaf and provides more consistent and effective pest control.

STEPS FOR SUCCESSFUL RESULTS

  1. MVP II is most effective when applications are targeted at newly hatched worms, before they penetrate inside the plant's protective foliage or fruit. Scout for eggs and apply MVP II when newly hatched larvae are present. Because omnivorous leafroller, leaffolder and orange tortrix may be difficult to detect as eggs, MVP II should be applied for these pests when moth flights occur or larvae are first detected.
  2. Use MVP II at 1.0 to 2.0 quarts per acre. Use a 2 quart rate when insect pressure is high. Uniform and complete coverage of the foliage where larvae are feeding is essential to good control. Application water volume should be sufficient to ensure good coverage, a range of 50-100 GPA is recommended. Do not apply MVP II in volumes to runoff.
  3. The addition of an appropriately labeled sticker is recommended to improve coverage and deposition on foliage. Avoid excessive rates of spreading or wetting agents which will promote runoff of MVP II.
  4. Scout fields 5 to 7 days after application to determine the effectiveness of the application, and to assess the need for subsequent applications. Retreat as needed to control reinfesting or increasing pest populations. More than one application may be necessary when worm populations are high. Reapply MVP II if rain occurs within six hours after treatment.
  5. When tank mixing MVP II with other products, comply with the most restrictive label instructions of all products involved.

Always read and carefully follow all product labels.

MVP II and CellCap are registered trademarks of Mycogen Corporation. DiPel is a registered product of Abbott Laboratories.

MVP II EPA Reg. No. 53219-12