Cranberries: New Reduced Risk Insecticide, Verdepryn
Verdepryn is a new insecticide registered for use in Wisconsin on several crops including pome fruit, grape, berries and small fruit, which include cranberry. It was registered in late 2019 and available for use starting this summer 2020. It is marketed by SummitAgroUSA™ under the formulation 100SL (100 grams of active ingredient per liter as a Soluble Liquid concentrate). Vedepryn, similar to Altacor and Exirel, is in the class of the anthranilic diamides (IRAC group 28), with a mode of action targeting the insect ryanodine receptors in the muscles, causing an uncontrolled release of calcium in the cells. Verdepryn contains the active ingredient cyclaniliprole. Verdepryn is an insecticide with foliar activity that is fast acting on contact or by ingestion of treated plant surfaces. Affected insects will rapidly stop feeding, become paralyzed, and eventually die. Verdepryn will kill both larvae and adults and has broad spectrum activity on many insect species. Verdepryn, Exirel and Altacor have the same mode of action and should NOT be used together in rotation to delay insecticide resistance, but rather insecticides from other IRAC groups (other than IRAC group 28) should be used in rotation with Verdepryn.
Under Berries and small fruits where cranberry is under, Verdepryn is registered to control a long list of insects and we are working with the company to add more cranberry insects to the label. As the label stands, for pests in Wisconsin cranberry specifically, it is registered for control of cranberry fruitworm and Japanese beetle, and suppression of tipworm (aka blueberry gall midge on the label). We have included this product in Jack Perry’s trials for about five years now and have found it to provide great control of our lepidopteran pests, including cranberry fruitworm, sparganothis fruitworm, blackheaded fireworm, the spanworm common Eupithecia, as well as flea beetle. Our trials did not show efficacy of Verdepryn against tipworm, similar to other diamides such as Altacor and Exirel, and the label lists suppression only for tipworm, so we do not recommend using it for tipworm. Overall, Verdepryn performs similar to Altacor and Exirel, and could be used to replace an application of Altacor or Exirel.
Verdepryn may be applied by ground equipment, chemigation, sprinkler irrigation and air. Spray volumes ranging from 20 to 100 gallons per acre for dilute sprays and 5 to 10 gallons for concentrate ground foliar applications are recommended. For more information on mixing and spraying, and all other considerations, please see the product label.
Verdepryn is highly toxic to bees exposed to direct treatment or residues on blooming plants. Do not apply Verdepryn when bees are foraging and until flowering is complete. Verdepryn is toxic to aquatic invertebrates and oysters and must not be applied directly to water.
Please check with your handlers before using a new product as PHI may vary from the one stated in the label. For example, in 2019, Ocean Spray had a 50-day PHI for Exirel on domestic as well as export processed and fresh fruit, which was different from the 3-day PHI stated in the label.
As always, make sure to read the label before using any pesticide. You can find the label of Verdepryn at the following link: http://www.cdms.net/ldat/ldEDF000.pdf
Happy growing season!
Insecticide: Verdepryn
- Available as 100SL (100 grams of AI per liter, Soluble Liquid)
- Restricted re-entry interval (REI): 4hrs
- Pre-harvest interval (PHI): 1 day*
- No more than 3 applications per year
- Do not exceed a total of 0.22 lb AI (33 fl. oz.) per acre per year
- Rate of use per acre: 8.2 – 11 fl. oz.
- Minimum interval between applications is 5 days