EFFECT OF NUTRIENT INTEGRATION ON INTENSITY OF MAJOR RICE INSECT PESTS UNDER TRANSPLANTING SITUATION
KrishiKosh
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Title |
EFFECT OF NUTRIENT INTEGRATION ON INTENSITY OF MAJOR RICE INSECT PESTS UNDER TRANSPLANTING SITUATION
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Creator |
Tiwari, Prem Shanker
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Contributor |
Sharma, Sanjay
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Subject |
Agricultural Entomology, fertilizers, rice, land resources, nitrogen, planting, animal developmental stages, yields, biological phenomena, silica, developmental stages
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Description |
The insect pest pose major devasting threat to agricultural productivity. The morphometric studies of insect pests under different treatments revealed that NPK doses @ 150%NPK (T4) favored highest growth and development of insect pest in terms of larval length and weight. Maximum leaf folder length (9.18mm), weight (32.03mg) and leaf area damage (79%); stem borer length (10.76mm), weight (55.13mg) and tunnel length (7.10cm); minimum BPH probing marks (8.88probes) and maximum honeydew secretion (176.38mm2) was recorded for the treatment received 150%NPK. Minimum leaf folder larva length (7.39mm), weight (12.68mg) and leaf area damage (26.60%); stem borer length (7.72mm), weight (33.44mg) and tunnel length (2.72cm); BPH higher probing marks (16.38probes) and lowest honeydew secretion (65.75mm2) was recorded for the treatment received 50%NPK+Green manuring. The impact of organic and inorganic fertilizers application was assessed for the presence of natural enemies‘ population under different treatment plots. It is revealed that higher NPK doses @ 150%NPK (T4) favored the higher natural enemy population as compared to lower dose @ 50%NPK (T2) and organic plots which was provided Gm (T10), BGA (T9) and Zinc (T5). The density of pest insect were also higher in these plots that`s why the natural enemies were observed in higher number. Application of 150%NPK (T4) had resulted highest population of spider (3.25/3sweeps), coccinellids (1.29/3sweeps), dragon flies (3.0/3sweeps), damsel flies (3.33/3sweeps), and staphylinid beetle (1.79/3sweeps) followed by 100%NP (T6) recorded spider (2.29/3sweeps), coccinellids (1.0/3sweeps), dragon flies (2.13/3sweeps), damsel flies (2.17/3sweeps) and staphylinid beetle (1.54/3sweeps). The farmer field survey revealed that overall 40% farmers used nitrogenous fertilizer along with phosphorous and 30% farmers had used recommended NPK doses ,only 10% used combination of organic and inorganic fertilizers and 20% farmers had used more than the xviii recommended dose of inorganic fertilizers . Among the farmer fields 48.75% fields have high pest incidence and 30% fields have moderate pest incidence, 10% farms and 11.25% farms recorded lower and extreme pest incidence respectively. The 80% farmers had obtained average yield from rice crop, followed by more than average yield (14.60%), while only 5.41 per cent respondents had obtained lower than average yield of rice. The yield was found positively correlated with fertilizer level and pest incidence and there is a positive correlation was found between fertilizer level and pest incidence. The soil and plant silica analysis at harvesting stage of crop revealed that treatment with green manuring (T10) and BGA (T9) recorded higher silica content i.e. 90.37% and 88.51% in soil and 8.52 and 8.25% in plant respectively. However the silica content was estimated 86.99% in soil and 5.54% in plant under 150%NPK (T4) treated plot where intensity of pest was recorded. The pest incidence (i.e. dependent variable) was found negatively correlated with the available silica percent (i.e. independent variable) in soil and plant sample. |
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Date |
2016-06-03T12:01:44Z
2016-06-03T12:01:44Z 2016 |
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Type |
Thesis
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Identifier |
173p
http://krishikosh.egranth.ac.in/handle/1/66705 |
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Language |
en
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Format |
application/pdf
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Publisher |
Indira Gandhi Krishi Vishwavidyalaya, Raipur CG
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