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Effect of biopriming on seed quality and management of seed borne pathogens in Garden pea (Pisum sativum L.)

KrishiKosh

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Title Effect of biopriming on seed quality and management of seed borne pathogens in Garden pea (Pisum sativum L.)
 
Creator NAIK, MANJUBALA
 
Contributor KAR, A. K
 
Subject vegetable crop, seedling, seed borne pathogen, biopriming method
 
Description An improved seed is a good investment for successful agriculture that demands good
germination to produce a vigorous seedling ensuring high yield. Garden pea (Pisum sativum L.)
is an important vegetable crop grown during winter season in Odisha. A number of seed borne
pathogens affect seed which reduce seed quality and cause seed borne diseases in the field,
adversely affecting yield and quality of produce.

Present study was carried out to critically analyse quality status of garden pea seeds
used by farmers in the state with special references to seed health and to evaluate biopriming
methods for managing seed borne diseases and enhancing crop quality in a sustainable way.
Thirty-six farmers’ seed samples collected from eight districts were found to possess seed
germination 10-15% below IMSCS (i.e. 75%) and carried 40.1-46% fungal count on seeds.
Aspergillus flavus, A. niger, Fusarium sp., Penicillium sp., were fungi frequently associated
with seeds which caused 24.4-55.6% reduction in germination and caused rotting of seed and
seedling shoot and root. Biological agents, Trichoderma viride and Pseudomonas fluorescens
were highly effective in inhibiting the growth of pathogens 61.1-81.8% and 83.3-88.8%,
respectively in vitro. Seed biopriming with Trichoderma viride (40%) for 4 hour was found the
best in enhancing seed quality parameters viz., germination, speed of germination, seedling
length, seedling dry weight, SVI-I and SVI-II by 32.8%, 55.4%, 44.5%, 35.3%, 90.7% and
80.2%, respectively and reducing seed rotting by 42.6%. Under green house condition seed
biopriming with Trichoderma viride 40% for 4 hour also was best with maximum seedling
emergence (85%) and minimum incidence of root rot and seedling blight (9.0% and 8.2%,
respectively), biopriming with P. fluorescens being the next best and at par with T. viride.
Biopriming also resulted in early initiation of flowering, less days to 50% flowering with
enhanced plant height, branches/plant, pods/plant, number of seed/pod, 100 seed weight, dry
pod weight and seed yield. Biopriming with Trichoderma viride 40% was the best with figures
for above characters 20days, 32days, 38.5cm, 8.2number, 9number, 11number, 36.4g, 7.3g and
36.1g/plant, respectively, and the figure for P. fluorescens (40%) was 20days, 32days, 38.3cm,
8number, 8.8number, 10.8number, 36.0g, 7.2g and 34.2g/plant, respectively, and it was 23.5,
35, 32, 6.6, 6.9, 9.0, 32.0, 5.7g and 19.9g/plant respectively, in control. Biopriming also
enhanced chlorophyll content of leaf and increased alpha-amylase activity, carbohydrate and
protein content of seed produced which were 62.1, 31.1, 31.7 and 17.2 percent more in T. viride
and 47.4, 31.8, 30.4 and 12.2 percent more in P. fluorescens over control. The results thus
revealed that seed biopriming with T. viride 40% or P. fluorescens 40% for 4 hr can
successfully manage seed borne pathogens and enhance seed and crop quality parameters in
garden pea.
 
Date 2017-01-20T11:41:23Z
2017-01-20T11:41:23Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/97302
 
Language en
 
Relation Th;4387
 
Format application/pdf