Vol. 7, Issue 6 (2019)
Impact of abiotic and biotic factors on population of tomato fruit borer, Helicoverpa armigera (Hubner) at Chhattisgarh
Author(s): Yogesh Kumar Sidar, AK Dubey, Dhananjay Sharma and Sanjay Sharma
Abstract: Impact of the various abiotic and biotic parameters on population of tomato fruit borer, Helicoverpa armigera (Hubner) was studied during 2016-17 and 2017-18 at the area of Horticulture Research cum instructional farm of vegetable science, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya (IGKV), Raipur, Chhattisgarh. On the basis of pooled mean various abiotic parameters viz. Maximum temperature, minimum temperature, wind velocity and evaporation and biotic parameters viz. larvae were showed highly positive significant impact on the population of Helicoverpa armigera but in case of morning relative humidity show highly negative significant impact were shown. During this period, pooled two year mean maximum temperature, minimum temperature, relative humidity, rainfall, wind velocity and sunshine was 33.90C, 19.40C, 67%, 2.8mm, 3.4 Km hr-¹ and 7.1 hr day-¹ respectively. The maximum larvae by Helicoverpa armigera was noticed during first week of March (10th SMW) with 5.05 larvae plant-1. There was a highly positive significant trend of correlation between the larvae population and maximum temperature, minimum temperature and wind velocity with ‘r’ value of 0.856**, 0.811** and 0.722** respectively at 5 per cent level of significance and regression line was worked out for no. of fruit borer laid Y= -17.44+0.63X1, Y=-4.51+0.48X2 and Y=-2.33+1.92X4 R2 0.73, 0.65 and 0.52 but in case of morning relative humidity (r = -0.776**) highly negative significant Y= 17.74-0.19X3 R2 0.60 and rain fall (r = 0.315) and sunshine (0.137) positive non-significant correlation was observed.
Pages: 2031-2034 | 219 Views 54 Downloads
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How to cite this article:
Yogesh Kumar Sidar, AK Dubey, Dhananjay Sharma, Sanjay Sharma. Impact of abiotic and biotic factors on population of tomato fruit borer, Helicoverpa armigera (Hubner) at Chhattisgarh. Int J Chem Stud 2019;7(6):2031-2034.
