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Title: Preharvest quarantine treatments of Chlorantraniliprole,Clothianidin, & Imidacloprid-based insecticides for control of Japanese beetle Coleoptera:Scarabaeidae)& other scarab larvae in the root zone of field-grown nurserytrees

Author
item OLIVER, JASON - Tennessee State University
item Ranger, Christopher
item Reding, Michael - Mike
item Moyseenko, James
item YOUSSEF, NADEER - Tennessee State University
item BRAY, ALICIA - Tennessee State University

Submitted to: Journal of Economic Entomology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/19/2013
Publication Date: 6/1/2013
Publication URL: http://handle.nal.usda.gov/10113/58149
Citation: Oliver, J., Ranger, C.M., Reding, M.E., Moyseenko, J.J., Youssef, N., Bray, A. 2013. Preharvest quarantine treatments of Chlorantraniliprole, Clothianidin, and Imidacloprid-based insecticides for control of Japanese beetle (Coleoptera:Scarabaeidae) and other scarab larvae in the root zone of field-grown nursery trees. Journal of Economic Entomology. 106:1190-1199.

Interpretive Summary: Japanese beetle, Popillia japonica Newman (Coleoptera: Scarabaeidae), is an important quarantine pest of nurseries. Nursery plant movement from P. japonica-infested regions is regulated by the U.S. Domestic Japanese Beetle Harmonization Plan (DJHP). Only certain insecticides are approved by the DJHP for pre-harvest treatment of nursery stock. In order to provide growers with more management options, our overall objective was to compare the efficacy of non-DJHP approved insecticides with DJHP standards. The selected insecticides generally performed poorly on other scarabs or curculionid larvae. However, Arena, Allectus, and generic imidacloprid 2 F products were as efficacious as the DJHP standards Discus, Marathon 60 WP, or Flagship 0.22G. Thus, Arena, Allectus, and generic imidacloprid 2 F are recognized as suitable candidates for the DJHP and should be considered for incorporation into the program to reduce the risk shipping Japanese beetle infested nursery stock.

Technical Abstract: Japanese beetle, Popillia japonica Newman (Coleoptera: Scarabaeidae), is an important quarantine pest of nurseries. Nursery plant movement from P. japonica-infested regions is regulated by the U.S. Domestic Japanese Beetle Harmonization Plan (DJHP), which classifies states by risk categories. Treatments for category 2 states include preharvest soil surface treatment of nursery plants grown in field soil using Discus SC, Marathon (1G or 60 WP), or Flagship (0.22G or 25 WG). In this study, Discus, Marathon 60 WP, or Flagship 0.22G DJHP standards were compared with labeled rates of non-DJHP-approved insecticides, including neonicotinoids clothianidin (Arena 50WDG), generic imidacloprid (Quali-Pro Imidacloprid 2 F T&O Insecticide, Mallet 2 F T&O Insecticide, and Lada 2 F Insecticide), and imidacloprid + bifenthrin (Allectus SC), as well as the anthranilic diamide, chlorantraniliprole (Acelepryn Insecticide). Arena provided 100% P. japonica control in May, June, and July over four test years, but had one larva recovered during August in two of those 4 yr. Acelepryn did not provide DJHP-acceptable P. japonica control. During July, Allectus provided 100% P. japonica control in three of four test years, but had four larvae in one test year. Other treatments tested only during July, which provided 100% P. japonica control, included Discus (five tests); Marathon, QualiPro, and Mallet (two tests); and Lada and Flagship (one test). Generic imidacloprid 2 F formulations were equivalent in P. japonica control to DJHP-approved insecticides. Insecticides generally performed poorly on other scarabs or curculionid larvae. The study supports Arena, Allectus, and generic imidacloprid 2 F products as suitable candidates for the DJHP.