FIELD STUDIES ON BROAD BEAN LEAFMINER, LIRIOMYZA CONGESTA (BECK.) A. VARIETAL RESISTANCE. B. SPATIA DISTRIBUTION OF LARVAE UNDER CONDITIONS OF KAFR EL-SHEIKH GOVERNORATE, EGYPT

Document Type : Original Article

Authors

1 Faculty of Agriculture, Al - Azhar University, Nasr City, Cairo, Egypt

2 Plant Protection Research Institute, Agricultural Research Centre, Giza, Egypt

Abstract

Larval population of the broad bean leafminer, Liriomzya conges­ta B.infested four faba bean varieties; Giza 402, Giza 3, Giza 461 and Reina Blanca and three breeding lines; 714, 716/1039 and 716/1024 was studied in 1991/92 season and repeated in 1992/93 without the breeding line 716/1024. The spatial distribution of the insect at three different levels (lower, middle and upper) of the plants of all faba bean varieties and breeding lines was also determined. Studies were made un­der natural infestation conditions in the field. Obtained data revealed that Reina Blanca variety was more susceptible to infestation with L.congesta in both seasons, while Giza 3 and breeding line 716/1039 were relatively the least susceptible ones for 1991/92 and 1992/93 seasons, respectively. The highest numbers of larvae were recorded in the middle leaflets of the plant in all tested varieties and breeding lines while the lowest number was obtained in the upper leaflets of the plant in all tested varieties and breeding lines while the lowest number was ob­tained in the upper leaflets. Such results help in the L.congesta manage­ment on faba bean fields.

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