Effectiveness of nano pesticides against Aschochyta rabiei causing blight disease in chickpea

Abstract

Non formulated fungicides and botanical extracts and zinc nitrate formulated plant extracts and fungicides were tested at different concentrations under laboratory conditions. Fungicides gave significantly more control over rest of the treatments during in vitro studies. Two fungicides i.e. Alliete and Thiovet_Jet, two plant extracts i.e. neem and datura, and zinc nitrate emained significant in their efficacy under laboratory conditions. Alliete and Thiovet_Jet @ 150pmm reduced 3.716% and 4.0250% colony growth of A. rabiei, respectively while botanical extracts; neem and datura at 50, 100 and 150 ppm concentrations inhibited 4.5667%, 4.3000% and 3.9917% and 4.2167%, 4.1500% and 3.5917% colony growth, respectively. These effective treatments were then tested by formulating with the zinc nitrate nano particles under in vitro conditions and proved effective. Under lab conditions, nano-Alliete controlled significantly more disease severity than nano Thiovet_Jet, while among formulated plant extracts, nano neem remained significantly more effective than datura which showed significant less effect over ascochyta blight. All nano formulated nano Alliete, nano Thiovet_Jet, nano neem and nano datura and zinc nitrate particles alone restricted disease severity to; 5.5583%, 3.8167%, 4.0000%, 3.8667% and 3.7583%, at 150 ppm concentrations, respectively compared to control (6.1750%) under lab conditions.