Comparative studies between the efficiency of the egg parasitoid, trichogramma evanescens west. And the insecticidal applications against the cotton bollworms in egyptian cotton fields
Abstract: Experimental trials to compare the efficiency of the egg parasitoid, Trichograntma evanescens West. with the insecticidal applications on the infestation with cotton bollworms; the pink bollwornt, Pectinophera gossypiella (Saund.) and the spiny bollworm, Earias insulana (Boisd.) in cotton fields were carried out at Quesna district, Menoufia Governorate for two successive seasons 2002 and 2003. Three to four parasitoid releases were conducted during the growth flowering and boll formation stages. Generally, the parasitoid releases showed higher reduction in both infestations compared with the insecticidal treatments. Reduction percentages ranged between 17.2 and 54.98%, when the parasitoid was released early during the flowering stage, meanwhile it attained 16.83%, when released later during the boll formation growth stage. In the parasitoid release areas, number of insecticidal applications was reduced to almost the half and consequently, the costs were dropped by 2-2.5 folds. Also, cotton boll weight averaged 3.14 and 3.82 gm in the T. evanescens release and insecticide areas, respectively.
Publication year 2003
Pages 455-463
Availability location معهد بحوث وقايه النباتات
Availability number
Organization Name
City الزقازيق
serial title The First Int. Egyptian - Romanian Conf.
Author(s) from ARC
Agris Categories Protection of plants - General aspects
AGROVOC
TERMS		 Earias insulana. Gossypium. Insecticides. Parasitoids. Pectinophora gossypiella. Trichogramma evanescens.
Publication Type Conference/Workshop
↑