Insecticide Tests With Diabrotica Vittata

Howard, Neale F.

doi:10.1093/jee/11.1.75

Cited by 2 publications

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“…Silkworms which had received a maximum dosage of the same arsenical voided in the feces only 19 per cent of the arsenic eaten, and Ceratomia, which had received an average dosage of the same poison, voided 64 During the feeding tests many samples of dead larvae were prepared for analyses, but only those of webworms (H. textor) and those of potato-beetle larvae were finally analyzed. The webworm is one of the most difficult to kill by arsenic, while the potato-beetle larva is one of the most easily killed.…”

Section: Statement Of Resultsmentioning

confidence: 99%

“…Four samples of arsenious oxid were examined under the microscope. Samples 19 The experiments with barium arsenate in 1S96 gave so good results that we were hopeful that this insecticide would prove superior to lead arsenate. Its killing effects on larvae in confinement are certainly superior to those of arsenate of lead.…”

Section: Physical Properties Of Arsenicalsmentioning

confidence: 97%

“…27476°-23-Bull.1147 Howard(19), experimenting with the spotted cucumber beetle in the field, used equal amounts (by weight) of several arsenicals.The average mortality on the fifth day, based upon the results of two seasons' work, is as follows: Zinc arsenite, 24 per cent; acid lead arsenate, 17 per cent; Paris green, 16 per cent; Bordeauxlead arsenate, 14 per cent; and calcium arsenate. 1 per cent.…”

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confidence: 99%

“…TOXICITY OF PURE ARSENIC OXIDS AND OF BASES.In order to judge as accurately as possible the relative toxicity of various bases when combined with the oxids of arsenic, the materials used are grouped in Table19. In each mixture of the bases, 0.48 gram of the base was used in 100 cubic centimeters of water.…”

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confidence: 99%

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Chemical, physical, and insecticidal properties of arsenicals

Cook¹,

McIndoo²

1923

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A study of the chemical, physical, and insecticidal properties of arsenicals on the market was undertaken in order to gain a better understanding of them, to be able, if possible, to improve them, and to produce new arsenicals for insecticidal purposes. The results of this investigation, which was conducted by the Bureau of Chemistry and the Bureau of Entomology of the United-States Department of Agriculture, are here reported. ARSENICALS STUDIED.Paris green and lead arsenate, which have been standardized and found reliable for many years, have constituted the principal insecticides used against external chewing insects. However, during the past few years, the use of calcium arsenate has steadily increased, owing in part to the discovery that it is effective in combating the boll weevil. The manufacture of calcium arsenate, although well beyond the experimental stage in most factories, probably will not be completely standardized for several j^ears. Because of the importance and recent large-scale production of calcium arsenate, many of the results in this bulletin deal with comparisons of calcium arsenate and acid lead arsenate.

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Section: Statement Of Resultsmentioning

confidence: 99%

Section: Physical Properties Of Arsenicalsmentioning

confidence: 97%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Chemical, physical, and insecticidal properties of arsenicals

Cook¹,

McIndoo²

1923

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“…100173°-24-Bull. 1147 Howard (19), experimenting with the spotted cucumber beetle in the field, used equal amounts (by weight) of several arsenicals. The average mortality on the fifth day, based upon the results of two seasons' work, is as follows: Zinc arsenite, 24 per cent; acid lead arsenate, 17 per cent; Paris green, 16 In comparing the toxicities of the various arsenicals, fed to several species of insects, equal percentages of the two oxids of arsenic (As 2 3 and As 2 5 ) were used in the spray mixtures.…”

Section: Miscellaneous Spray Mixturesmentioning

confidence: 99%

Chemical Physical, and Insecticidal Properties of Arsenicals

Cook¹,

McIndoo²

1924

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A study of the chemical, physical, and insecticidai properties of arsenicals on the market was undertaken in order to gain a better understanding of them, to be able, if possible, to improve them, and to produce new arsenicals for insecticidai purposes. The results of this investigation, which was conducted by the Bureau of Chemistry and the Bureau of Entomology of the United States Department of Agriculture, are here reported. ARSENICALS STUDIED. Paris green and lead arsenate, which have been standardized and found reliable for many years, have constituted the principal insecticides used against external chewing insects. However, during the past few years, the use of calcium arsenate has steadily increased, owing in part to the discovery that it is effective in combating the boll weevil. The manufacture of calcium arsenate, although well beyond the experimental stage in most factories, probably will not be completely standardized for several years. Because of the importance and recent large-scale production of calcium arsenate, many of the results in this bulletin deal with comparisons of calcium arsenate and acid lead arsenate.

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Insecticide Tests With Diabrotica Vittata

Cited by 2 publications

References 0 publications

Chemical, physical, and insecticidal properties of arsenicals

Chemical, physical, and insecticidal properties of arsenicals

Chemical Physical, and Insecticidal Properties of Arsenicals

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