تعیین تاثیرعصاره های آلوئه‌ورا و پوست‌پسته درکنترل پسیل پسته

Agonoscena pistaciae Burkhardt and Lauterer (Hem:Aphalaridae) are the important pests of pistachio garden. In each year, these pests feeding on juice of leaf and cased the drop of leaf and buds, as reduce of crop in next year and getting serious damage to farmers. In addition, it consumes the most amount of poison in pistachio gardens. To control this pest, a lot of poison is consumed in pistachio gardens. In order to preserve the environment and produce healthy, replacement of low risk materials with pesticides is necessary in the integrated management pprograms. In this research, the effect of ethanolic extracts of Pistachio peel skin and leaves of Aloe vera on five-year-old pistachio nymphs by spraying and under constant conditions (at a temperature of 25±1 °C, humidity 65±5 percentage and the light period 8:16) 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. Results shows the lethal concentration (LC50) for Aloe vera and Pistachio peel skin in 24 hours after treatment, respectively 39.398 and 10.994 g / l and line gradient respectively2.30±0.26 and 2.50±0.34 evaluated. Based on these results, Aloe vera plant extract is more effective than Pistachio peel skin extract and can be considered in control pests programs.