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Subject: Entomology × Author: Sumit Kumar × Start date: 2015 × Type: Thesis ×
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    ThesisItemOpen Access
    To study the field efficacy of newer insecticides as seed treatment and foliar application against various insect pests of potato
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2015-07) Sumit Kumar; Srivastava, R.M.
    The present experiment was conducted from November- February, 2013 at Vegetable Research Centre, G.B. Pant University of agriculture and Technology, Pantnagar situated in Tarai region of Uttarakhand. A total of 10 species of insect pests belonging to 10 genera, 8 families and 4 orders were found to be associated with potato. Associated to these pest, 2 predators of aphids belonging to family Coccinelidae (Coleoptera) and 4 parasitioids belonging to families Eulophidae, Icheneomonidae, Braconidae and Pteromalidae were also reported. Out of 10 potato insect pests collected, the aphid (Myzus persicae), White fly (Bemesia tabaci) and leaf hopper ( Amrasca bigutulla bigutulla) were the predominant species infesting the potato crop. The initial appearance of potato aphid M.persicae during the cropping season 2013, (0.79 aphids/3 leaves) was observed during 47th standard week, attains its peak in 51st standard week whereas the appearance of whitefly (Bemisia tabaci) and jassid (Amrasca bigutulla bigutulla) at 47th, 47th standard week respectively and these pests attain peak with a population of (24.10 and 6.48 /3leaves) at 52nd and 50th standard week respectively. During the cropping season winter, 2013. As seed treatment Imidacloprid 200SL@0.04% solution was found as the most effective insecticides against aphids (Myzus persicae),whitefly (Bemesia tabaci), Jassid (A.bigutulla bigutulla) followed by Imidacloprid 600FS@15ml/100kg. During the cropping season winter, 2013. As foliar application Imidacloprid 70WG @90gm a.i./ha was found as the most effective insecticides against aphids (Myzus persicae),whitefly (Bemesia tabaci), Jassid (A.bigutulla bigutulla) followed by Thiomethaxam 25WG @90gm/ha while Imidacloprid 70WG @50gm/ha was appeared safest insecticides for existing natural enemy population.