Effect of temperature and prey density on prey consumption and fecundity of the predatory bug, Anthocoris minki pistaciae (Hemiptera: Anthocoridae)

POURALI, Z.; MEHRNEJAD, M. R.; KHERADMAND, K.

doi:10.22092/jaep.2011.107234

Effect of temperature and prey density on prey consumption and fecundity of the predatory bug, Anthocoris minki pistaciae (Hemiptera: Anthocoridae)

Document Type : Pest Management

Authors

10.22092/jaep.2011.107234

Abstract

The predatory bug, Anthocoris minki pistaciae was known as a natural enemy of the common pistachio psylla, Agonoscena pistaciae in pistachio orchards in Kerman province. The prey consumption and fecundity of this predatory bug were determined at constant temperatures, 50-60% R.H. and 16:8 L: D hours using psyllid nymphs as prey. Based on the results, prey consumption was increased up with increasing of temperature significantly. The daily prey consumptions at nymphal stage were increased from 13.6 at 17.5 C to 21.3 at 30 C on average. The adult’s prey consumption at two temperatures of 27.5 C and 30 C were 41.76 and 50.87, respectively and the differences were significant. The effect of five different prey densities e.g. 10, 15, 25, 50 and 75 fourth instars’ psyllid nymphs were examined on predator’s fecundity for 7 consecutive days. The results showed that this predator laid 4.5, 6.7, 9.9, 10.6 and 11.1 eggs per day respectively. This study revealed that the nymphs of A. pistaciae are a suitable prey for A. minki pistaciae for development and reproduction. In addition, this predatory bug has ability to keep its population under a harsh condition, like when the prey density is in low level.

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