Biorational management of mites in chilli (Capsicum annuum L.)
Loading...
Date
2019-12
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu
Abstract
Kashi Anmol, Kashi Gaurav and LCA-408 were found to be moderately resistant. The varieties LCA-402, Surja coll, Kalyanpur Chanchal, Punjab Lal, P.T-12-3, Pant C-1, CMB-4 and CH-1 were found moderately The present experiment on Biorational management of Mites in chilli (Capsicum annuum L.) was conducted at Chatha farm, SKUAST- Jammu from August 2018 till the harvest of crop (December, 2018). The study revealed that yellow mite P.latus (Banks),infestation was first observed nearly a 15 days after transplanting i.e., The seasonal incidence of yellow mite observed at experimental sites indicated that yellow mite was found damaging and remain active on the chilli crop and attained peak in 43rd standard week 36.98 mean number of mites per leaf. It is evident from the data that mite population is significantly influence by mean temperature and relative humidity. The increase in temperature coupled with decrease in relative humidity from 2nd week of August 2018 to 3rd week of October 2018 favoured the increase of P. latus (Banks).The weather parameters i.e., temperature (Maximum and Minimum), relative humidity (Morning and Evening) and rainfall, plays an important role in reproduction, development and survival of the insect pests. Weather parameters had greater influence on fluctuation of mite population. The correlation studies showed that mite population was positively correlated with mean temperature whereas, negatively correlated with relative humidity (highly significant with mean R.H.) and negatively correlated with rainfall. The correlation studies showed that the yellow mite populations was positively correlated with mean temperature whereas, it was negatively correlated with mean relative humidity with correlation values of -0.035. However, a negative and non-significant correlation was established with rainfall.The overall impact of weather factors on population build-up of mite was 57.00 per cent which reflects that there were some another environmental factors i.e. solar radiation, sunshine, rainy days and wind velocity who governed the 43.00 per cent role in population build-up of yellow mite on chilli.
Out of 13 varieties, only three varieties susceptible against yellow mite. The varieties KDCS-810UP and LCA-443 were found susceptible.
Studies conducted for management of yellow mite, various botanicals and acaricides including thyme oil, neem oil, garlic oil, pongamia oil, propargite, abamectin, cyenopyrafen, rosemerry oil and mantis were tested against yellow mite. Abamectin was most effective in reducing yellow mite population followed by cyenopyrafen and propargite. All the other treatments were also significantly superior over control in reducing the yellow mite population.The present investigation shall be useful to formulate some alternative methods such as use of organic amendments, botanical pesticides, bio agents and low risk eco- friendly pesticides, which are safe to the consumers as well as for the environment. Therefore, the present study is being chalked out to develop the bio-rational management of mites in chilli.
Description
Keywords
null