اثر کشندگی عصاره دوگیاه دارویی روی شیره خشک پسته

Agonoscena pistaciae is one of the most important native pests of pistachio gardens in Iran. By feeding on vegetable syrup , they bring irreparable damage to the pistachio crop. Farmers say to this pest “dry wine”, Because the honeydew released from the body of this psylla, dried and inform Sugar particles under trees were shown. Nutrition of nymphs and adult insects caused break down buds, leaves and seeds. It also affects the quantitative and qualitative products of the next years. Various methods, including the use of pesticides, have been used to control this pest, but due to environmental problems and the protection of natural resources, the used of insecticides must be reduce. In recent years, the use of plant extracts has been considered for pest control. In this research, the effect of ethanolic extracts of Aloe vera and Rubia tincturum on the age of five nymph of pistachio psylla at 25±1°C , humidity 65±5 % and light period 8:16(Light to darkness) evaluated. Bioassay tests were done on leaf discs and with different concentrations of extracts were sprayed on a fifth instar pistachio psylla and distilled water and ethanol were used as control treatments. The numbers of dead psylla were cantered 24 hours after spraying. This experiment was conducted in a completely randomized design with 5 replications for each treatment. Data was analyzed with probit software. Lethal concentration (LC50) for Aloe vera and Rubia tincturum extracts evaluated 3.938 and 4.6 g/l respectively. lethal concentration indicates that the effect of aloe vera extract on pistachio spsylla is higher than Rubia tincturum extract. Therefore, in order to control of pistachio psylla, In addition to garden management, the used of Aloe Vera extract can be effective.