Research Summary Abstract
Tolfenpyrad was first registered as Hachi-Hachi 15 EC in the United States on July 28, 2010 for the control of aphids, leafhoppers, scales, thrips, whiteflies, and early instar lepidopteran larvae on ornamental horticulture crops grown in greenhouses. An expansion of this label for outdoor uses is planned. The IR-4 Project completed 160 trials on 24 ornamental plant species from 2010 through 2014 examining phytotoxicity related to foliar applications of Hachi-Hachi 15EC or Hachi-Hachi SC. In this report, 11 species or genera exhibited minimal or no injury after foliar treatments of Hachi-Hachi 15EC (tolfenpyrad) at 21, 48 and 84 fl oz per 100 gal. All can be added to the label as crops tested for tolerance: (Alyssum sp., Angelonia sp., Antirhinnum sp., Begonia sp., Chrysanthemum/Dendranthemum sp., Dahlia sp., Petunia sp,. Tagetes sp., Verbena sp., Viola sp. and Zinnia sp.). For Hachi-Hachi SC, 12 crops can be listed on the label as crops tested for tolerance (Alyssum sp., Angelonia sp., Antirhinnum sp., Bacopa sp., Begonia sp., Dahlia sp., Gerbera sp., Petunia sp., Tagetes sp., Verbena sp., Viola sp. and Zinnia sp.), and two crops should be included in listing of crops where treatments are not recommended: Impatiens sp. and Impatiens, New Guinea Hybrids.