THE EFFECT OF ARTIFICIAL FEEDING THE DEVELOMENT AND GROWTH OF THE THIRTEEN- SPOTED LADYBIRD HIPPODAMIA VARIEGATE THE SEVEN-SPOTED LADYBARD COCCINELLA SEPTEMPUNCTATA.L

Abstract

The laboratory experiments were conducted laborators of Biollogical control in the Graduate Studies Laboratory at Al-Mussaib Technical College,AL-Furat Al-Awsat Technical University on 10/8/2020to show the possibility of breeding and propagating two types of predatory ladybirds,namely the thirteen-spoted ladybird Hippodamia. variegate and the seven-spoted ladybird Coccinella. Septempunctata.L on a group of different artificial foods(Alfalfa leaf powder,chicken egg yolk powder,Fish meal,sedge pollen powder,locust powder)in addition to live whitefly nymphs and frozen whitefly nymphs.The results showed:

Adults of the thirteen-spoted ladybird H.variegate and the seven-spoted ladybird C.Septempunctata.L succeeded in surviving for twenty-three days when fed with different artificial foods and with significant differences compared with the control treatment.

The larvae of the adult thirteen-spoted ladybird H.variegate and the seven-spoted ladybird C.Septempunctata.L succeeded in survival,reaching the highest period of 8.34days for the second larval instar compared to the control treatment,which amounted to 2.72days,with significant differences

None of the larval stages of the thirteen-spoted ladybird H.variegate and the seven-spoted ladybird C.Septempunctata.L from moulting to the later instar when fed on the above-mentioned artificial foods.While the larvae that fed on live whitefly nymphs and frozen whitefly nymphs were able to complete their development and growth normally.

The thirteen-spoted ladybird H.variegate and the seven-spoted ladybird C.Septempunctata.L could not lay eggs when fed on artificial foods.While the total number of eggs for the thirteen-spoted ladybird H.variegate during the study period was(315.40,211.20egg)when reared on live and frozen whitefly nymphs,respectively,while the total number of eggs for the seven-spoted ladybird C.Septempunctata.L was(307.80,245.2egg)When reared on live whitefly nymphs and frozen whitefly nymphs,respectively.