scholarly journals Seasonal Incidence of Insect-pests of Soybean and their Correlation with Abiotic Factors

2019 ◽  
Vol 8 (04) ◽  
pp. 752-756
Author(s):  
Nikki Bhardwaj ◽  
Bhavna Verma ◽  
Praveen Bhardwaj
Keyword(s):  
Insect Pests ◽  
Abiotic Factors ◽  
Seasonal Incidence

scholarly journals Seasonal Incidence of Major Insect Pests of Cowpea in Relation to Biotic and Abiotic Factors

2017 ◽  
Vol 6 (8) ◽  
pp. 1777-1784 ◽  
Author(s):  
Maya Shree Mahipal ◽  
Shri Gajendra Chandrakar ◽  
Yashpal Singh Nirala ◽  
Devendra Nishad ◽  
Birendra Tigga
Keyword(s):  
Insect Pests ◽  
Abiotic Factors ◽  
Seasonal Incidence ◽  
Biotic And Abiotic Factors

Seasonal incidence of insect pests on soybean in relation to weather parameters

2017 ◽  
Author(s):  
CNJS Arangba Mangang ◽  
K. Nandini Devi ◽  
Kh. Lenin Singh ◽  
A. Dorendro Singh
Keyword(s):  
Insect Pests ◽  
Abiotic Factors ◽  
Flea Beetle ◽  
Population Level ◽  
Stink Bug ◽  
Seasonal Incidence ◽  
Southern Green Stink Bug ◽  
Soybean Leaf ◽  
Green Stink Bug ◽  
Aphis Glycines Matsumura

An experiment was carried out at ICAR Entomology Farm at Umaim, Meghalaya in kharif season during 2011with the aim to study seasonal incidence of insect pests on soybean (Glycine max (L.) Merrill).Six insects species, viz., stem fly (Ophiomyiaphaseoli Tryon), soybean leaf folder (NacoleiavulgalisGuen.), white spotted flea beetle (MonoleptasignataOliv.), jassids (EmpoascakerriPurthi), aphids (Aphis glycines Matsumura) and southern green stink bug (Nezaraviridula Linn.) were recorded. Among them stem fly and soybean leaf folder were found to be major pests.The population level of these insect pests was fully observed during 2nd week after sowing with a peak during July and August. Correlation studies indicated that only stem fly and soybean leaf folder were significantly correlated with abiotic factors viz., the minimum temperature and rainfall that favoured the development of stem fly whereas sunshine hours for the leaf folder.

scholarly journals Seasonal Incidence and Effect of Abiotic Factors on Population Dynamics of Sucking Insect Pest Complex of Groundnut

2021 ◽  
pp. 10-17
Author(s):  
K. Shamili Dhatri ◽  
M. S. V. Chalam ◽  
A. Rajesh ◽  
B. Ramana Murthy ◽  
N. C. Venkateswartlu
Keyword(s):  
Negative Correlation ◽  
Minimum Temperature ◽  
Significant Positive Correlation ◽  
Insect Pests ◽  
Abiotic Factors ◽  
Insect Pest ◽  
Significant Negative Correlation ◽  
Maximum Temperature ◽  
Seasonal Incidence ◽  
Positive Correlation

Studies on seasonal incidence of sucking insect pests carried out with three dates of sowing viz., early (July 15th), normal (July 30th) and late (August 15th) revealed that the incidence of leafhoppers, aphids and thrips started from 5 to 14 DAS (days after sowing) and continued till harvesting. In early sown crop, the incidence of leafhoppers started from 31 SW and incidence of aphids and thrips started from 30 SW and continued up to 42 and 43 SW for leafhoppers and aphids, respectively and 41 SW for thrips. In normal sown crop, incidence of leafhoppers and aphids started from 32 SW and incidence of thrips started from 31 SW and continued till the end of 45 SW for all the three pests. In late sown crop, the incidence of leafhoppers started from 35 SW and incidence of aphids and thrips started from 34 SW and continued up to 46 and 47 SW for leafhoppers and aphids, respectively and 46 SW for thrips. Correlation studies revealed that incidence of leafhoppers exhibited significant negative correlation with maximum temperature (r = -0.467, -0.442 and -0.464) and rainfall (r = -0.518, -0.529 and -0.742) during all the three dates of sowing (early, normal and late, respectively) and significant negative correlation with minimum temperature in late sown crop (r = -0.448). Aphids exhibited significant negative correlation with maximum temperature (r = -0.469, -0.521 and -0.472) and rainfall (r = -0.443, -0.450 and  -0.721) in all the three dates of sowing (early, normal and late, respectively) while significant negative correlation with minimum temperature in early and late sown crop with r values -0.519 and -0.324.  Thrips exhibited significant positive correlation with maximum temperature (r = 0.522, 0.459 and 0.447), significant negative correlation with rainfall (r = -0.458, -0.465 and -0.451) during three dates of sowing (early, normal and late, respectively) while significant negative correlation with relative humidity in early sown crop (r = -0.616) and significant positive correlation with minimum temperature in early sown crop (r = 0.463).

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