تأثير درجات الحرارة في مدة الخزن و بعض الأوجه الحياتية لبالغات متطفل البيض

الملخص EN

The species Telenomus busseolae Gahan.

(Scelionidae: Hymenoptera) is considered as an effective egg parasitoid against stalk borers of Lepidoptera Sesamia cretica Led.

Several laboratory experiments were conducted to determine the suitable tempreture for storing this parasitoid to be used in mass rearing programs and field releases.

Two temperature regimes 15ºC and 20 ºC were considered during the duration of this study.

Results had indicated that both survival and adult life span were significantly influenced by storage conditions.

Survival rate was 97% after storage period of 10 days at 20ºC reduced to 64 and 14% after 35 and 50 days of storing at the same temperature respectively.

Female survived storage periods of 10 and 50 days were able to infest 51 and 20 of the corn stalk borer.

Eggs repectively.When the parasitoid adults stored at 15ºC, survival rates were 100, 85, 58 and 13% after 30, 60, 90 and 120 days of storing, respectively.

The number of stalk borer eggs attacked was 58 for females survived 30 days of storing, however it was reduced to 31 and 24 egg for females stored for 60 and 120 days, respectively.

Females reared at 26ºC were able to infest 118 of the corn stalk borer eggs.

No influence was observed on behavior and performance of emerging females of these treatments copared to control females reared at normal conditions, Therefore,the present results would be of benefit in mass rearing programs especially in case of shortage or absence of the stuable host.