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Control of the cotton aphid and the boll weevil in 1940



Control of the cotton aphid and the boll weevil in 1940



Jour Econ Ent 34(4): 580-582



Field-plot tests conducted at State College, Miss., in 1940 with Ca arsenate and mixtures of Ca arsenate and sulfur for control of the boll weevil showed that these treatments caused significant increases in cotton aphid populations. The addition of derris to these materials effectively controlled the aphids and held the populations at nearly the same level as the checks. There was practically no difference in aphid control from the use of derris when mixed with regular Ca arsenate, derris mixed with micronized Ca arsenate, and derris and Ca arsenate mixed and then micronized. Nicotine and tobacco dust when added to Ca arsenate were not effective in preventing an increase of aphids. Ca arsenate and Ca arsenate-sulfur mixtures with derris gave good control of the boll weevil. There was no significant difference between these treatments and undiluted Ca arsenate under the conditions of this expt., where the weevil infestation was light.

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Accession: 024406219

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DOI: 10.1093/jee/34.4.580


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