volume 35 issue 1 (march 2001) : 52-55,
ESTIMATION OF CROP LOSS DUE TO CROCIDOLOMIA BINOTALIS ZELL IN INDIAN RAPESEED AND DETERMINATION OF ITS ECONOMIC THRESHOLD LEVEL
1Deptt.of Entomology
Orissa Agric. Univ., Bhubaneswar-751 003, India
Published In
Indian Journal of Agricultural Research
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volume 35 issue 1 (march 2001) : 52-55,
ESTIMATION OF CROP LOSS DUE TO CROCIDOLOMIA BINOTALIS ZELL IN INDIAN RAPESEED AND DETERMINATION OF ITS ECONOMIC THRESHOLD LEVEL
1Deptt.of Entomology
Orissa Agric. Univ., Bhubaneswar-751 003, India
ABSTRACT
Experiment was conducted during 1995–96 to investigate the influence of environment factors on disease development. Twenty five days old tomato seedlings were planted from 16 th July 1995 to 21 th October 1996 at a fortnight interval and plants were inoculated with the bacterial suspension. The results revealed that the maximum per cent disease incidence (58%) was noticed on the seedings planted on second fortnight of October 1995 which is positively favoured by the temperature (19.55–28.25°C) and relative humidity (95%). There was significant positive correlation between disease severity and relative humidity I (r=0.6334) and non significant correlation with minimum temperature (r = −0.1526). However, no disease incidence was recorded during summer months indicating negative correlation of temperature (32–35°C) and relative humidity.
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REFERENCES
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- Snedecor, G.W. and Cochron, W.G. (1976) Statistical Methods. State Univ. Press.Ames, Iowa, 593 pp.
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Published In
Indian Journal of Agricultural Research