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SEASONAL OCCURRENCE AND MANAGEMENT OF MAJOR INSECT PESTS ON RABI POTATO AT RAIPUR

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Title SEASONAL OCCURRENCE AND MANAGEMENT OF MAJOR INSECT PESTS ON RABI POTATO AT RAIPUR
 
Creator Nag, Dhananjay
 
Contributor Gupta, Rajeev
Chandrakar, H.K.
Sharma, Pravin Kumar
Saxena, Ravi R.
 
Subject INSECT PESTS,RABI POTATO,RAIPUR
Agricultural Entomology
 
Description Correlation studies were worked out between the population of predators
and that of sucking pests. There was a positive correlation between aphid and
ladybird beetle, thrips and lady bird beetle, leaf hopper and lady bird beetle and
leaf hopper and spider with „r‟ value of 0.758 (regression equation, y = 0.038x +
0.398, R2 = 0.570), 0.829 (regression equation, y = 0.03x + 0.410, R2 = 0.687),
0.810 (regression equation, y = 0.083x + 0.170, R2 = 0.664) and 0.865 (regression
equation, y = 0.158x + 0.190, R2 = 0.749), respectively at 5 per cent level of
significance.
Similarly, whitefly density was significantly negatively correlated with
minimum temperature (r = (-) 0.760, regression equation y = 2.513x + 18.17,
R2=0.579) and evening relative humidity (r (-) 0.839, regression equation y =
1.698 + 2.231, R2 = 0.705) and significantly positively correlated with sunshine
hours ( r= 0.759,regression equation y = 1.698+2.231, R2= 0.577).
Among the tested cultivars Kufri Chipsona-I recorded lowest incidence of
aphid (2.5per plant), thrips (2.69/plant) and leaf hopper (2.04/plant) and
maximum tuber yield (108.33q/ha).
The treatment Imidacloprid 17.8 SL (150 ml/ha) followed at 15 days
interval by Thiamethoxam 25 WG 100g/ha was most effective and economical
against sucking pests with maximum tuber yield of 129.17q/ha and 16.95:1 B:C
ratio. Imidacloprid when applied at 150ml/ha was most safe to predatory fauna
present on the crop with maximum population of lady bird beetle (0.50/plant),
spider (0.62/plant) and staphylinid beetle (0.57/plant) .
 
Date 2016-12-15T11:54:36Z
2016-12-15T11:54:36Z
2016
 
Type Thesis
 
Identifier 149 p.
http://krishikosh.egranth.ac.in/handle/1/90286
 
Language en
 
Format application/pdf
 
Publisher Indira Gandhi Krishi Vishwavidyalaya, Raipur