Effect of Timing of Application on Effectiveness of Isofenphos, Isazophos, and Diazinon on Japanese Beetle (Coleoptera: Scarabaeidae) Grubs in Turf

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Abstract:

Diazinon 5G (6.72 kg [AIl/ha), isofenphos 5G and 2F (2.24 kg [AIl/ha), and isazophos IG and IE (2.24 kg [AIl/ha) were applied on 11 dates to golf-course turf in Bolton, Mass., to determine the effect of timing of application on effectiveness against Popillia Japonica Newman grubs. Plots were sampled 1, 2, 3, 4, 6, 8, and 10 weeks after application. Level of control generally was isazophos IE > isofenphos 2F = isazophos IG > isofenphos 5G > diazinon 5G. For many sampling dates, treatments did not differ significantly; isazophos IE, however, consistently resulted in the highest level of grub mortality. Weather conditions during the study suggest that a thorough application of water or heavy spring rainfall at the time of chemical application are important factors enhancing insecticidal activity.

Document Type: Research Article

Publication date: February 1, 1985

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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