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FIELD EVALUATION OF SOME NEWER FUNGICIDES AGAINST TIKKA LEAF SPOTS AND RUST OF GROUNDNUT (Arachis hypogaea L.)

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Title FIELD EVALUATION OF SOME NEWER FUNGICIDES AGAINST TIKKA LEAF SPOTS AND RUST OF GROUNDNUT (Arachis hypogaea L.)
 
Creator RAMA KISHAN, G
 
Contributor CHANDRASEKHARA RAO, K
 
Subject FIELD, EVALUATION, SOME, NEWER, FUNGICIDES, AGAINST, TIKKA, LEAF, SPOTS, RUST, GROUNDNUT
 
Description Field experiments were carried out to evaluate
the efficacy of three systemic fungicides viz.,
hexaconazole (0.2%), thiophanate-methyl (0.05%) and
carbendazim (0.05%) and two non-systemic fungicides
viz., chlorothalonil (0.27%) and mancozeb (0.2%) on
active ingredient basis against tikka leaf spots
(Cercospora arachidicola and Phaeoisariopsis personata)
and rust (Puccinia arachidis) of groundnut during the
kharif season of 1990-91 at the College Farm, APAU,
Rajendranagar. In one experiment, all the fungicides
with 3, 4, 5 and 6 spray schedules were tested on
Kadiri-3 grour.dnut cultivar to find out the number of
sprays of each fungicide required for effective control
of tikka leaf spots and rust of groundnut. The
experiment was laid out in a randomized block design
replicated twice. In another experiment the
combinations of all these fungicides at field
recommended doses and half the field recommended doses
were tested against tikka leaf spots and rust of
groundnut u£ing the cultivar TMV-2 with a randomized
block desiyn replicated twice. All the fungicides tested were significantly
effective over control in reducing the incidence of
tikka leaf spots and rust with a consequent increase in
pod yield, number of pods/plant, shelling percentage
and haulm yield and resulted in reducing defoliation at
all the spray schedules tested. However, three sprays of all the f~ngicides were sufficient to control both
the diseases economically. Hexaconazole was found to be
highly effectiva over all the other fungicides tested.
Chlorothalonil was on par with thiophanate methyl and
was significantly superior over carbendazim and
mancozeb. Nevertheless, thiophanate-methyl followed by
carbendazim and mancozeb were most profitable for
control of these diseases as the cost-benefit ratio was
highest with these fungicides.
All the combinations of fungicides at the
field recommended doses and half the field recommended
doses were significantly effective over control in
reducing the incidence of both the diseases. They were
also effective in reducing defoliation with consecutive
increase in pod yield, number of pods/plant, shelling
percentage and haulm yield. The combination of
hexaconazole (0.2%) + chlorothalonil (0.27%) was found
to be highly effective in controlling both the diseases
and increasing the yield. However, the combinations of
carbendazim (0.025%) + thiophanate-methyl (0.025%) and
thiophanate-methyl (0.025%) + mancozeb (0.1%) were most
profitabl~.
 
Date 2016-08-19T13:17:06Z
2016-08-19T13:17:06Z
1991
 
Type Thesis
 
Identifier ACHARYA N.G.AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD - 500 030
http://krishikosh.egranth.ac.in/handle/1/73009
 
Language en
 
Format application/pdf