Correction to “Guidelines” – Verdepryn insecticide has low toxicity to many beneficial species

Janet van Zoeren and Anna Wallis

 

Verdepryn/cyclaniliprole, together with Altacor and Exirel, are IRAC group 28 ‘diamide’ insecticide. Both Verdepryn 100SL and Cyclaniliprole 50SL are labeled for use in New York in all pome fruits, stone fruits, berry crops, and grapes.

However, there is incorrect information about this product in the 2024 Cornell Pest Management Guidelines for Commercial Tree Fruit Production book. Page 65 shows a table of insecticides registered for use in tree fruit crops, and their toxicity to beneficials (including bees, predatory mites, a species of lady beetle, and a predatory species of midge fly). Cyclaniliprole (Verdepryn) is listed on page 65 as being highly toxic to all five beneficial species. This is incorrect. In truth, research shows that cyclaniliprole is low toxicity to the four beneficial species listed, except for bees. Cyclaniliprole is highly toxic to bees, and must not be applied when pollinators are present. New research shows that cyclaniliprole has mixed toxicity to decomposers – it has low toxicity to earthworms, and moderate toxicity to collembola (Urionabarrenetxea et al. 2023).

The online version of the guidelines has already been corrected, and the 2025 version will show the corrected information. Please be sure to annotate your print versions of the guidelines to reflect the accurate information!

Thank you to everyone who has contributed to and continues to be involved in updating the Guidelines annually. We appreciate the patience and vigilance in continuing to improve this invaluable resource.

References:

Urionabarrenetxea, E., C. Casás, N. Garcia-Velasco, M.J.G. Santos, J.V. Tarazona, and M. Soto. 2023. Environmental risk assessment of PPP application in European soils and potential ecosystem service losses considering impacts on non-target organisms. Ecotoxicology and Environmental Safety, Volume 266.