در شرايط آزمايشگاه ANDRALLUS SPINIDENSCF. HEM.: PENTATOMIDAE مطالعه تاثير نوع ميزبان روي بيولوژي سن شكارگر آندرالوس

A study of the host effect on biology of a predatory bug Andrallus spinidens (F.) (Hem:Pentatomidae) under laboratory conditions

Biology of a predatory bug, Andrallus spinidens (F.) on hosts of Spodoptera exigua, Ephestia Kuehniella, Chilo supperessalis, Galleria me/lone/fa and a mixture of them (except E. Kuehniellv was studied. Different hosts had significantly different effects on duration of embryonic period, as it varied between a minimum of 7.5 days in G. mellonella to a maximum of 9 days in E. Kuehniella and mixture of them too. These hosts did not have any significant different effect in duration if pre-oviposition and oviposition periods, but they had significantly different effect on duration of postoviposition period. This study revealed that nymphalperiod was varied from a minimum of 18.25 to a maximum of 21.37 days on G.mellonela and S. exigue, respectively. Means of unmated adults longevity, depending on the kind of host, ranged between 31 to 40.25 days for males and 30 to 47.7 days for females, respectively. Matuing of adults had significant effects on their longevity. In all of our observations, males longevity was shorter than females. Mean duration of one generation forA.spinidens was 43.7, 41.5,39.5 and 46.3 days on S. exigua , E. Kuehnilla, Ch. Supperessalis. G. Mellonella and mixture of them respectively.