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EFFECT OF INDIGENOUS PRODUCTS AND BIO-NUTRIENTS WITH REDUCED LEVELS OF FERTILIZERS ON THE INCIDENCE OF INSECT PESTS OF BRINJAL

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Title EFFECT OF INDIGENOUS PRODUCTS AND BIO-NUTRIENTS WITH REDUCED LEVELS OF FERTILIZERS ON THE INCIDENCE OF INSECT PESTS OF BRINJAL
 
Creator Mallick, Jyotirekha
 
Contributor Pattnaik, H.P.
 
Subject INDIGENOUS PRODUCTS, BIO-NUTRIENTS, REDUCED LEVELS, FERTILIZERS, INCIDENCE, INSECT PESTS, BRINJAL---
 
Description The field studies entitled” Effect of indigenous products and bio-nutrients with reduced levels of fertilizers on the incidence of insect pests of brinjal” were undertaken during winter 2012-2013 at the Central Research Station, OUAT, Bhubaneswar.
The studies with brinjal cv. Blue star in a split plot design was conducted with main plot treatment consisting of two factors i.e. recommended dose of fertilizer(RDF-125:80:100kg/ha) and 50% RDF + Bio-NPK(azospirillum, phosphate solublising microbes and potassium mobilizing bacteria) and the sub-plot treatment consists of cow urine(10%)+ cow dung (10%)+neem leaves (5%) [T1], cow urine(10%) +cow dung(10%)+ karanj leaves(5%) [T2], Pot mixture of botanicals [T3], Spinosad 45 SC [T4], Carbosulfan 25 EC and control. The nutrient levels tested i.e. RDF and 50% RDF+Bio-NPK could not influence the population of jassids significantly, while application of 50%RDF with Bio-NPK showed significantly high population of whiteflies (3.65/3leaves) as against 3.05/3 leaves in plot receiving RDF.. Similarly among the control stratergies significantly of low shoot damage of 1.03 % was recorded in plots treated with insecticides like Spinosad 45 SC (1ml/4litres of water) and carbosulfan 25
EC(2ml / litres of water)Similarly, the leaf damage by epilachna beetle , fruit damage (both on number and weight basis) and marketable fruit yield were found unaffected by the nutrient level tested. Comparatively low shoot damage of 14.5% was recorded in plots applied with recommended dose of fertilizer (125:100:80 kg/ha of N, P and K) as against 19.6% in plots applied with 50% RDF and bio-NPK
However, irrespective of control stratergies the benefit cost ratio was maximum (3.44:1) when the crop was given 50%RDF + Bio-NPK. Moreover, when the nutrient content (N, P and K) of the leaves in response to nutrient levels was examined it was found that Bio-NPK with 50% enhanced the N (3.44%) and P (0.429) content in the leaves, while the corresponding nutrient levels was found to be comparatively less (3.13%N & 0.3%P) in the leaf samples collected from a crop fertilized with RDF. The K content in leaves, invariably remained high (2.89-4.20%) in plots received RDF. Both the nutrient levels tested also could not influence the plant height and chlorophyll content significantly, but application of RDF was found better in respect of the above parameters as well as in respect of the leaf area which was found to be significantly higher (864.23 cm2) than that of Bio-NPK (784.5 cm2). Similarly, the plant height and chlorophyll content were not affected significantly by the control stratergies tested. However, the leaf area was found to be significantly more (893.4 cm2) with carbosulfan 25 EC treatment, thus indicating its possible phyto-tonic effects and this was followed by the treatment with organics [T1 and T3] which recorded the leaf area as 829-840 cm2.
Among the beneficial arthropods, different spider species were invariably recorded in all plots irrespective of treatments. Nutrient levels did not influence their population density appreciably, while among the treatments application of insecticides showed comparatively less population of spiders (0.4/3 meter row length) than other treatments including control (1.20-1.70/ 3 meter row length).
A modest cost benefit ratio of 2.65:1 was observed in sole application of spinosad 45 SC [T4] in brinjal crop raised with RDF. However pot mixture [T3] was found to be ideal in terms of benefit cost ratio (1.60:1), when crop raised with 50% RDF+Bio-NPK
 
Date 2017-01-04T14:35:41Z
2017-01-04T14:35:41Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/94472
 
Language en
 
Relation Th;4023
 
Format application/pdf