IMPACT OF WEATHER FACTORS ON THE INCIDENCE OF MAJOR INSECT PESTS OF OKRA (ABELMOSCHUS ESCULENTUS L. MOENCH)

RAJESH AARWE¹, R. PACHORI², A.K. SHARMA³, A.S. THAKUR⁴, R. MANDLOI⁵*
¹Department of Entomology, College of Agriculture Jabalpur, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur- 482004, Madhya Pradesh, India
²Department of Entomology, College of Agriculture Jabalpur, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur- 482004, Madhya Pradesh, India
³Department of Entomology, College of Agriculture Jabalpur, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur- 482004, Madhya Pradesh, India
⁴Department of Entomology, College of Agriculture Jabalpur, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur- 482004, Madhya Pradesh, India
⁵Department of Entomology, College of Agriculture Jabalpur, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur- 482004, Madhya Pradesh, India
* Corresponding Author : rishikeshmandloi1@gmail.com

Received : 13-01-2016     Accepted : 25-01-2016     Published : 07-02-2016
Volume : 8     Issue : 3       Pages : 981 - 983
Int J Agr Sci 8.3 (2016):981-983

Keywords : Jassid, Aphid, Whitefly, Shoot and fruit borer and Weather factors
Academic Editor : Rodrigo De Almeida Vaucher, Yu-shin Nai
Conflict of Interest : None declared
Acknowledgements/Funding : Thanks to most esteemed guide and my advisory Dr. Rajesh Pachori (Professor), Dr. A. S. Thakur (Scientist), Dr. A. K. Sharma (Assistant Professor), and especially thanks to Dr. A. K. Sharma (Assistant Professor) for his cheerfully advice during thesis period, Department of Entomology, College of Agriculture, JNKVV, Jabalpur for his most valuable and inspiring guidance, close supervision, constant encouragement and constructive criticism coupled with valuable suggestions during the course of this investigation and in preparation of this manuscript
Author Contribution : None declared

An experiment was conducted to observe the “Impact of weather factors on the incidence of major insect pests of okra” during kharif season of 2014 at Entomological experimental field, college of agriculture JNKVV Jabalpur (M.P.). Major activity period of jassid (Amrasca biguttula biguttula) was observed from August 2014 to October 2014 with two distinct peaks during 36th and 37th SW (Standard Week) (131.50 and 136.00 jassid/ per 30 leaves) and Aphis gossypii was observed from August 2014 to 1st week October 2014 with two distinct peak 36th and 37th SW (46.50 and 44.50 Aphid/ per 30 leaves) respectively while Bemisia tabaci was appeared first week of August to last week of September 2014 with two distinct peak 34th and 35th SW (3.83 and 3.33 whitefly/ per 30 leaves). Shoot and Fruit borer, Earias vittella observed from last week of August 2014 up to crop maturity 43rd SW with three distinct peak 36th, 40th, & 41st SW (42.00, 41.33 and 41.67 % fruit infestation). Analysis of correlation regression between weather (abiotic) factors and the major insect pests of okra showed that population of Amrasca biguttula biguttula had a significant positive correlation with maximum temperature (r=0.58) and (byx=18.15) while Bemisia tabaci had a significant positive correlation with minimum temperature (r=0.67) and (byx0.34). While Aphis gossypii and Earias vittella showed that non significant relationship with weather parameter.