Abstract: The host-stages preference of pistachio psylla, Agonoscena pistaciae, by green lacewing larvae chrysoperla carnea, was studied in two experiments in growth chamber conditions (40±5%, R. H., L: D 14:10. H. and Tem. 26±2°C). To identify the most preferred stage of psylla in the first experiment, all stages of psylla in equal ratios and in the second, variable ratios of 15:45, 45:45 and 45:15 of 4th and 5th nymphal instars were used. The results showed that 4th nymphal instars of green lacewing were the most preferred stage with 17.33% of predatism. Whereas 5th nymphal instars had 16.8% predatism. Other stages, the 3 r dand 2 n dand 1 snt ymphal instars had 13.6% and 10% and 6.8% predatism, respectively. In the second experiment with variable ratios of 4th and 5th instars of pistachio psylla, predatism of 4th instars in ratios 25, 50 and 75 percent of total population were 25.66, 52.63 and 79.82 %, respectively, while those for 5th instars nymphs were 20.18, 47.37 and 74.34%, respectively. So there was a positive preference for 4th instars and a negative preference for 5th instars nymphs.
کلید واژگان :Pistachio psylla % Agonoscena pistasiae % Predator % Chrysoperla carnea Host preference
ارزش ریالی : 600000 ریال
با پرداخت الکترونیک