National Academy of Agricultural Sciences (NAAS)
|
PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted at Experimental Farm, School of Agricultural Sciences and Rural Development, Nagaland University, Medziphema Campus during Rabi season of 2016-17 to study the effect of weather parameters on incidence of major insect pests infesting potato crop. Leafhopper appeared during 46th SMW (Standard mean week), while first incidence of potato aphid, whitefly and mealybug was seen on 47th SMW. The peak populations of potato aphid were observed in 4th SMW with a mean population of 23.93 per three leaves. Whitefly (1.67 per three leaves), leafhopper (1.87 per three leaves) and mealybug (3.20 per three leaves) were observed in 1st, 3rd, 1st SMW, respectively. Whitefly, leafhopper and mealybug demonstrated non-significant negative association with minimum temperature (r= -0.457, -0.467 and -0.506, respectively) but significant negative correlation (r= -0.744) in potato aphid. Negative significant correlation was recorded (r= -0.658, -0.692, -0.862 and -0.821) of maximum temperature with potato aphid, whitefly, leafhopper and mealybug, respectively. Minimum relative humidity was non-significant negatively correlated (r= -0.398, -0.037,-0.018 and -0.069) with potato aphid, whitefly, leafhopper and mealybug, respectively. Potato aphid and mealybug infestation had negative non-significant correlation (r= -0.345 and -0.024, respectively) with maximum relative humidity, but non-significant positive correlation (r=0.157 and 0.105) in leafhopper and whitefly, respectively. Rainfall showed positive non-significant correlation (r=0.330, 0.232 and 0.390) with whitefly, leafhopper and mealybug, respectively. Aphid population was non-significant negatively correlated (r= -0.163) with rainfall.
Citations |
 |
 |
 |
 |
