تأثير كثافات مختلفه من حشرة من الباقلاء الأسود (Homoptera: Aphidae)‎ Aphis fabae في كفاءة افتراس يرقات و بالغات نوعين من الدعاسيق

Abstract EN

A series of experiments were conducted on the laboratory in reveral the possibilty of masseraing of two species of predatory Coccinellides namly Coccinella septem - punctata and C.undecim - punctata on different numbers of aphids daily supplied to larvae and adults Coccinellides were studies to show the effect of these diet on their biology and reproduction , the functional response curves were derived for each larval instar and for adults the results showed that ; 1.

The number of aphids consumed daily by each laval instarand adult stage was increased significantly as the number of aphids supplied daily increased .

2.

Females Coccinellides consumed daily more than male .

3.

C.undecim – punctata female cosumed significantly more aphids than .C.

septem - punctata .

4.

The attack cofficient (a) of Coccinellides larvae was increased as age of larvae progressed in the contrary the handling time of Coccinellideslarvae was decrease as larvae progressed in age.

5.

The attack – cofficient of C.undecim – punctata was greatest than that of .C.

septem - punctata , however the handling tim of the first lady – bird was smaller than of the second one 6.

The attack – cofficient of Coccinellides females were found to be greater than that of male , but the handling time of females were smaller than that of the male