• S F Hameed

      Articles written in Proceedings – Animal Sciences

    • Assay of some systemic insecticides againstHyadaphis erysimi (Kalt.) onBrassica campestris L., var,sarson Prain

      D N Vaidya S F Hameed N P Kashyap

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      Five systemic organophosphorus insecticides were tested for their intrinsic toxicity in laboratory and persistence of their field-weathered deposits following spray onsarson crop (Brassica campestris L., var.sarson Prain) at recommended concentrations against mustard aphidHyadaphis erysimi (Kalt.). Phosphamidon and demeton-S-methyl proved to be sufficiently toxic compounds and provided protection to the crop for more than 3 days. Thiometon compared to dimethoate was a less toxic insecticide but relatively more persistent. Formothion was found to be the least toxic and least persistent insecticide.

    • Biological performance of some organophosphorus insecticides againstQuadraspidiotus perniciosus Comstock on apple

      A K Thakur S F Hameed

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      Toxicity and persistence of five organophosphorus insecticides following one summer spray in 1975 and two in 1976 at 0·05% conc. (400 gm a.i./ha) on apple cv ‘red delicious’ were evaluated againstQuadraspidiotus perniciosus Comstock at Solan, Himachal Pradesh. Fenitrothion was found to be highly toxic to the crawlers of the scale; methyl-parathion and diazinon proved to be intermediate in toxicity while phosalone and malathion respectively were less toxic compounds. Phosalone was highly persistent (ca 2 weeks) but did not provide enough protection to the fruits against the pest insect owing to its low intrinsic toxicity. The deposits formed on apple by fenitrothion, methyl-parathion and diazinon were relatively less persistent but provided 23 to 27, 14 to 18 and 10 to 15 days protection respectively to the fruits. The fruits were found safe for consumers use after 20–22 days following the application of fenitrothion, 14–16 days of phosalone, 12–13 days of diazinon, 9–11 days of methyl-parathion and less than 1 day when malathion was sprayed. All the insecticide residues were within the acceptable limits at the time of harvest.

    • Evaluation of some organophiosplioins insecticides againstDacus cucurhitae Coquillett on peach

      N P Kashyap S F Hameed

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      Toxicity and persistence of fenitrothion, fenthion, malathion, methyl parathion, and trichlorphon applied at 0·05% (400 g/ha) were evaluated on peach fruits (Primus persica L.) against the neonate larvae ofDacus cucurhitae Coquillett in two seasons (1977–78). Fenitrothion and methyl parathion were highly toxic materials followed by fenthion and malathion, while trichlorphon was the least toxic. Fenitrothion was highly persistent (12 days) followed by methyl parathion (7 days). All the insecticide residues were within the acceptable limits at the time of harvest

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