Influence of temperature and relative humidity on survival and fecundity of pauridia peregrin a, a parasite of mealybugs and its interactions with planococcus citri
1982
GOL'BERG, ALLA M.
Some biological aspects of the encyrtid parasite Pauridia peregrina Timberlake were studied. Non-ovipositing ♀♀ lived longer than ovipositing ♀♀. Parasite survival was strongly affected by relative humidity. Females survived best at 21.5° and 92% r.h.; 41.0° and 45% r.h. caused 96.7% mortality within 3 hr. Total number of eggs laid was not influenced by 49-71% r.h. at 26.5°. Lowering of the r.h. increased the proportion of the eggs laid on the first day to 91.1, 65.9 and 59.1%, respectively, at 49, 57, and 71% r.h. The parasite could complete development in mealybugs (Planococcus citri (Risso)) growing on young twigs of grapefruit. Grapefruit sepals provided good protection to mealybugs against P. peregrina.
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