STUDIES ON POPULATION DENSITY AND MANAGEMENT OF GROUNDNUT LEAF MINER, Aproaerema modicella Deventer WITH NANO SCALE NSKE FORMULATIONS
Loading...
Date
2016
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Acharya N.G. Ranga Agricultural University, Guntur
Abstract
The present investigations on “Studies on population density and management of groundnut leaf miner, Aproaerema modicella Deventer with nano scale NSKE formulations” were carried out at dryland farm, S.V. Agricultural College, Tirupati and IFT, RARS, Tirupati. Seasonal incidence of groundnut leaf miner was studied with four dates of sowing and pheromone traps. The results indicated that incidence of leaf miner was high when the crop was sown in August compared to June and July months. Correlation studies were done by taking into consideration the standard week-wise weather parameters with two weeks lag and correlated with weekly observations of incidence of groundnut leaf miner in terms of mining and webbed leaves as well as number of larvae. Results indicated that the incidence of leaf miner and webbed leaves were negatively correlated with maximum temperature, minimum temperature, sunshine hours and rainfall, while positively correlated with morning relative humidity, evening relative humidity. The correlation studies with groundnut leaf miner indicated that groundnut leaf miner infestation was positively correlated with maximum temperature, minimum temperature and negatively correlated with morning relative humidity, evening relative humidity, rainfall and sunshine hours.
The studies on pheromone trap catches of groundnut leaf miner indicated that positive correlation with maximum temperature, morning relative humidity, rainfall, rainy days, sunshine hours while negative
xiv
correlation with minimum temperature and evening relative humidity. Among the seven weather parameters, minimum temperature (-0.573), evening relative humidity (-0.477) showed significant negative influence on moth catches but morning relative humidity (0.493) showed significant positive influence on moth catches of A. modicella.
Synthesized zinc and silver nanoparticles containing were characterized using UV-Vis spectrophotometer, Particle size and Zeta potential analyzer and Fourier Transform Infrared Spectrophotometer (FTIR). Among all the nano treated NSKE (neem seed kernel extract) formulations the zinc oxide and silver nitrate solution treated with different concentrations of NSKE showed the spectrum absorbance peak of zinc oxide nanoparticles at 265 nm for 5 g of neem seed kernel extract, 272 nm for 10 g, 278 nm for 20 g, 280 nm for 30 g and 284 nm for 50 g of neem seed kernel extract and silver recorded maximum absorbance peak at 400 nm.
The studies on management of groundnut leaf miner was conducted during kharif, 2015 with nano scale Zn coated NSKE formulations. Different concentrations of nano scale Zn coated NSKE treatments were used i.e. nano scale (Zn) coated NSKE formulations @ 5 g/l, nano scale (Zn) NSKE formulations @ 10 g/l, nano scale (Zn) NSKE formulations @ 20 g/l, nano scale (Zn) NSKE formulations @ 30 g/l, and nano scale NSKE formulations @ 50 g/l, without nano scale NSKE formulations @ 50 g/l, quinalphos @ 2.0 ml/l, only silver nano particles @ 100 ppm. The efficacy of all treatments were evaluated at different stages. Results revealed that nano scale (Zn) coated NSKE formulation @ 30 g/l was found to be most effective treatment followed by nano scale NSKE formulations @ 50 g/l, quinalphos @ 2.0 ml/l, only silver nanoparticles @ 50 g/l, nano scale (Zn) NSKE formulations @ 20 g/l for management of groundnut leaf miner damage and also reduction of A. modicella larval population.
Description
D5334
Keywords
null