Studies on Control of Corn Earworm on Sweet Corn in Southern California in 194912
- 1 December 1951
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 44 (6) , 905-909
- https://doi.org/10.1093/jee/44.6.905
Abstract
With heavy populations of Heliothis armigera, individual ear spray treatments with an emulsion of 1% DDT in 5-10% mineral oil gave 92-95% control (worm free ears). Individual ear dust (3% DDT) treatments gave approx. 82% control while broadcast dust treatments gave only 26% control. Occasionally, ear injury occurred where the DDT-oil emulsion sprays were used but no plant damage was observed on the dust-treated corn. DDT dusts gave better earworm control than dusts of parathion, TDE, Ryania, methoxychlor, lindane, dieldrin and aldrin. Individual ear dust treatments should begin without a day or two after appearance of the silk and be repeated at 3-day intervals for 3-4 applications. Large quantities of DDT residues (46-208 ppm.) were found on ear husk, silk and other corn plant refuse, but none on the edible portion of the corn ear.This publication has 2 references indexed in Scilit:
- Control of Corn Earworm on Sweet Corn in Southern California1Journal of Economic Entomology, 1949
- Attempts to Protect Sweet Corn from Infestations of the Corn Ear Worm, Heliothis Obsoleta (Fabr.)Journal of Economic Entomology, 1929