Control of Boll Weevil in Cotton with Selected Insecticides, 1992 | Zendy

B. R. Leonard | Zendy; P. A. Clay | Zendy; J. B. Graves | Zendy

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Control of Boll Weevil in Cotton with Selected Insecticides, 1992

Author(s) -

B. R. Leonard,

P. A. Clay,

J. B. Graves

Publication year - 1993

Publication title -

insecticide and acaricide tests

Language(s) - English

Resource type - Journals

ISSN - 0276-3656

DOI - 10.1093/iat/18.1.243

Subject(s) - sprayer , boll weevil , weevil , mathematics , toxicology , agronomy , horticulture , environmental science , biology

Two tests were conducted to evaluate the efficacy of selected insecticides against boll weevil in irrigated cotton planted 15 Apr. For both tests, plots consisted of 5 rows (102 cm centers) x 15 m. Treatments were arranged in a RCB design with 4 replications. Insecticides were applied on 13, 16, 20, 23, and 27 Jul in both tests. Applications were made with a high clearance sprayer calibrated to deliver 56.2 liters total spray/ha through TX-8 hollow cone nozzles (2/row) at 2.11 kg/cm2. Treatments were evaluated by examining 50 cotton fruit (squares) per plot for evidence of damage. No additional foliar insecticides were applied to the plots during this test. The test area received 0.56 cm rainfall on 14 Jul, 0.7 cm rainfall on 15 Jul, 0.4 cm rainfall on 17 Jul and 0.4 cm rainfall on 22 Jul, 0.3 cm rainfall on 23 and a trace of rainfall on 27 Jul.

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