Abstrakt: |
The life history of Neoseiulus longispinosus (Evans), a common predaceous mite on various plants in central, eastern, and southern Thailand, was studied under laboratory conditions at 30±2 °C, 50±5% r.h., and continuous light. Eggs or larvae of Tetranychus kanzawai Kishida, T. truncatus Ehara, T. urticae Koch, Eutetranychus africanus (Tucker), Oligonychus mangiferus (Rahman et Sapra), or O. simus (Pritchard et Baker) were provided as prey on excised mung bean, cassava, strawberry, tangerine, mango, and sugarcane leaf arenas, respectively. The predator completed its development on each of these prey, except for the eggs of O. mangiferus. Larvae were observed to feed after hatching. To develop from egg to adult, this predator required minimally 3.2±0.3 days when fed T. truncatus eggs or E. africanus larvae, and slightly more when fed eggs of E. africanus. Females reared on various stages of T. truncatus lived 22.0±2.8 days, during which 47.1±8.8 eggs/female were laid (= 2.6±1.1 eggs/female/day). Ten commonly used pesticides were sprayed on N. longispinosus and mortality was assessed after 24 h for larvae, nymphs, unmated females, and gravid females. Egg mortality was checked after 3 days. Almost all pesticides tested were toxic to all stages of N. longispinosus. The only exception was Nissourun®, which caused 12.4 and 56.5% mortality of eggs and gravid females, respectively. [ABSTRACT FROM AUTHOR] |