Priprava in vrednotenje počasnih feromonskih razpršilcev pri zatiranju trtnega molja in brinjalskega sadnega in poganjkovega zavijača

The inclination towards pest free produce in agriculture pose a greater challenge to farmer practices. Mating disruption has become an integral component of the IPM system which interferes with insect mating. MD of Lepidopteran insects using active and passive dispensers with various pheromone loads and release patterns are reported. The longevity of passive dispensers with Mesoporous silica nanoparticles (MSN), Mesoporous Carbon spheres (MCS) and 1:1 admixture of these materials embedded with synthetic pheromones were evaluated. The synthesized MSN and Carbon spheres showed no agglomeration as evident from Zeta potential of -16.8 mv and -42.12 mv respectively. The blend of dispenser materials showed the highest EE (Entrapment efficiency) and LC (Loading capacity) with respect to the TGAIs (E, Z)-7,9-dodecadienyl acetate) and E-11 hexadecenyl acetate, in the range of 90-92% and 45–46% respectively. The residual pheromone analysis of slow-release dispensers showed 47-57% release of BFSB Pheromone and 89-90% Lobesia pheromone release in 120 days and in comparison, pheromone wax emulsions showed 80 % release in 40 days. Statistical analysis of variance showed significant difference in release of Lobesia from different dispenser materials. The high R2 for first order kinetics with 92% Entrapment efficiency supports slow release of pheromones from the selected materials.