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Studies on cereal cyst nematode, heterodera avenae woll. on wheat (Triticum aestivum) with emphasis on nutrients

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Title Studies on cereal cyst nematode, heterodera avenae woll. on wheat (Triticum aestivum) with emphasis on nutrients
 
Creator Yadav, Saroj
 
Contributor Kanwar, R.S.
 
Subject null
 
Description Investigations were carried out on absorption and translocation of nutrients in wheat infected
with Heterodera avenae, its management through organic amendments, crop rotation and additional
fertilizers as soil application and spray. Effect of fertilizers on emergence of larvae from cyst was also
studied.
Absorption and translocation of nutrients in wheat was hampered by nematode. Combination
of all four nutrients promoted plant growth and reduced nematode population. N, P, K and Zn contents
in soil were more, in their respective treatments, where the individual nutrients were applied. Amount
of nutrients was more in infested soil than uninfested soil. Combination of all the four nutrients
increased the nutrient uptake in wheat and nutrient content in straw and grain was more in uninfested
soil. Organic amendments reduced nematode populations and increased plant growth both with and
without nematicide. Castor cake at 20g/kg soil increased plant growth but neem cake at same dose gave
maximum population reduction. All the organic amendments performed better in combination with
nematicide than alone. Recommended doses of fertilizers with urea (2.5 %) + zinc (0.5 %) spray at 30
days after sowing followed by kinetin (100 ppm) spray at 40 days after sowing improved maximum
plant growth but 30 % higher dose of fertilizers reduced maximum nematode population. Fenugreekwheat
rotation increased plant growth more than other rotations but mustard-wheat and cabbage-wheat
rotations reduced maximum nematode population. Fenugreek and gram increased N content in soil but
maize reduced the N and P content and cabbage reduced the K content in soil. Nematode penetration
occurred in susceptible wheat, resistant wheat and maize but not in gram, fenugreek, mustard, cabbage,
garlic and onion. Under laboratory conditions, all fertilizers suppressed larval emergence from cysts,
except zinc, which stimulated it. In pots, minimum nematodes in soil and roots were found at higher
dose of urea. In zinc larvae in roots and soil were less than untreated check (water) but higher than
other fertilizer treatments.
 
Date 2018-10-18T09:01:37Z
2018-10-18T09:01:37Z
2018
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/5810081728
 
Language en
 
Format application/pdf
 
Publisher CCSHAU