تهیه فرمولاسیون میکروکپسول بر پایه عصاره چریش در کنترل آنتراکنوز توت‌فرنگی

One of the important strawberry diseases, especially in humid weather conditions, is the strawberry anthracnose disease caused by Colletotrichum nymphaeae, which is one of the most important limiting factors for strawberry cultivation and production all over the world, including Iran. Considering the limitations associated with the use of fungicides in strawberry fields, in this research, an effective formulation of neem (Azadirachta indica) has been attempted. To prepare the formulation of plant biopolymers with new changes, the separation method of water-miscible solvent through precipitation with salt was used. Efficacy investigation of the concentrations of 2, 4 and 8 per thousand prepared formulations compared to commercial Neemazal® showed that the microcapsule formulation of the extract in concentrations of 4 and 8 per thousand with 89.38 and 85.57% inhibition in the growth of the disease-causing fungus Anthracnose were included in a same statistical group. Also, by observing the first symptoms of the disease, the biocontrol ability of the formulated extract in controlling strawberry anthracnose with doses of 2, 4 and 8 per thousand in greenhouse conditions fourteen days after foliar spraying showed that the best treatment was related to the extract formulated with a dose of 4 per thousand. The results related to the effect of the formulated extract on strawberry flowers and fruits at a dose of four per thousand also showed that the disease rate was reduced by 90% compared to the infected control. Based on this, the formulated neem extract can be used as a suitable and efficient alternative in the control of plant pathogens.