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BIOLOGY AND BIOEFFICACY OF SELECTED INSECTICIDES AGAINST SAFFLOWER APHID, Uroleucon compositae Theobald ON SAFFLOWER

KrishiKosh

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Title BIOLOGY AND BIOEFFICACY OF SELECTED INSECTICIDES AGAINST SAFFLOWER APHID, Uroleucon compositae Theobald ON SAFFLOWER
 
Creator SHIRISHA, M
 
Contributor RAMAN GOUD, T
 
Subject BIOLOGY, BIOEFFICACY, SELECTED, INSECTICIDES, AGAINST, SAFFLOWER, APHID, Uroleucon, compositae, Theobald, SAFFLOWER
 
Description The field experiments were carried out for safflower aphid,
Uroleucon compositae Theobald at College Farm, College of Agriculture,
Rajendranagar, Hyderabad during rabi season of 2004-2005 to study the instar
composition and the efficacy of different selected insecticides, while,
laboratory studies on the biology of safflower aphid was conducted in
Department of Entomology, College of Agriculture, Rajendranagar, Hyderabad.
The biology and morphometric studies indicated that the safflower aphid
U. compositae was multiplied parthenogenetically and there were four nymphal
instars. The total nymphal period was completed in 9.68+0.69 days. Prereproductive,
reproductive and post-reproductive periods were 1.34+0.41,
7.97+0.90 and 0.55+0.50 days, respectively. The average fecundity was
31.68+12.79 nymphs. Total life cycle was completed in 15.00 to 25.50 days.
The highest per cent infestation on branches (85.81+13.60%) was
recorded in fifth standard week (February first week). Initially the aphids were
found on the lower plant parts and as the plant reached maturity, the infestation
was abundant on upper parts like inflorescence and capsules. In the colony,
first and second instars were more in number compared to other instars. Alate
aphids were more in early and mature stages of the plant.
Among different insecticides, dimethoate (0.05%) was more effective than
the other treatments against safflower aphid. The neem oil 1 % proved to be best
among the plant products. Dimethoate (0.05%) recorded highest yield and ICBR
than other treatments. Border spraying of NSKE (5%) and dimethoate (0.05%) were
least effective in reducing the aphid population.
 
Date 2016-08-20T14:25:31Z
2016-08-20T14:25:31Z
2005
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/73193
 
Language en
 
Relation D7693;
 
Format application/pdf
 
Publisher ACHARYA N.G.RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD