EFFECT OF SEED TREATMENTS WITH BIOAGENTS AND FUNGICIDES ON SEED QUALITY AND YIELD OF SOYBEAN GENOTYPES
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Date
2004
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ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD
Abstract
Freshly harvested seeds of popular soybean varieties LSB-3, JS-335
and MACS-450 were collected from Agricultural Research Station, Adilabad
and treated with bioagents (Trichoderma viride, Trichoderma harzianum,
Bacillus substillis and Pseudoman fluorescens) and fungicides (thiram, thiram
+ carbendazim) and maintaining untreated control. After seed treatment the
seeds were sown in field with three replications duly adopting Split Plot
Design in order to find out the effect of seed treatments on incidence of seed
borne diseases, plant growth parameters, yield and yield components. After
seed treatment another portion of seed material of the above soybean
genotypes were packed in cloth bag and polylined cloth bag for assessment of
seed quality, seedling vigour and storability and data were subjected for
Factorial Randomized Block Design (FRBD).
The germination percentage, seedling vigour, field emergence and
storability were high in seed treatments particularly thiram, thiram +
carbendazim and T.viride as a result of suppression of seed borne mycoflora
and maintenance of strong membrane integrity. Seeds packed in vapour proof
container (polylined cloth bag) were also effective in improving the seed
quality, seed germination, seed health, seedling vigour and storability in all the
soybean genotypes.
Total dry matter production, number of seeds per pod, number of seeds
per plant, plant stand, 100 seed weight, seed recovery percentage, seed yield
per plant and seed yield per hectare were increased with seed treatments
particularly thiram, thiram+carbendazim and T.viride. An untreated plot
recorded 987 kg ha-1 and it was inferior to seed treatments. The additional
increase of yield per hectare over control were 616, 508, 346 kgs in LSB-3,
941, 836, 668 kgs in JS-335 and 851, 655, 569 kgs in MACS-450 with thiram,
thiram + carbendazim and T.viride respectively.
Thus it is recommended that seed treatments in soybean either with
thiram or thiram + carbendazim and T.viride were found effective and
beneficial to the farmers for reducing the incidence of seed borne pathogens
(Cercospora kikuchi, Colletotrichum dematium, Alternaria alternate,
Macrophomina phaseolina, Soybean mosaic virus, leaf crinkle virus, yellow
mosaic virus and peanut bud necrosis virus) and getting better quality seed and
yield in soybean genotypes.
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Keywords
EFFECT, SEED, TREATMENTS, WITH BIOAGENTS, FUNGICIDES, SEED, QUALITY, YIELD, SOYBEAN, GENOTYPES