Phytomyza orobanchia Kalt. (Diptera : Agromyzida) a valuable biocontrolling agent against broomrape in Egypt
Abstract: Field work started in 1996/97 faba bean season and continued for six successive years to find out rates of the natural beneficial role of Phytomyza orobanchia Kalt. against Orobanche spp. (the serious parasitic weeds infesting different economic crops) in 260 locations belonging to11 Egyptian governorates. Releasing this beneficial fly in plastic screen cages and in the open field was also carried out to estimate the efficacy of release in raising the damage caused to orobanche capsules. Highest seasonal mean percentage of infested Orobanche capsules occurred in 1996/97 season, followed by 1998/99 season (73.8 &55.28% respectively). Lowest seasonal activity was detected in 1997/98 (30.54%), followed by 2001/02 season (39.16%). The fly activity varied between different locations and also between different governorates, being higher in Alexandria, Beheira and Kafr El-Sheikh (74.3, 61.9 & 60.1%, respectively) and lower in Beni – Suef, Fayoum and Qalubiyah (overall seasonal means being 25.4, 31.3 & 32.1% infested capsules) indicating higher activity by moving to the north towards the Mediterranean coast. Data confirmed that the fly play an important natural biocontrolling role in all fields invaded with Orobanche. Semi – field and field releases of P. orobanchia in faba bean fields were conducted by releasing the freshly emerged fly adults or pupae before emergence or by placing heavily infested O. crenata spikes in plastic screen cages constructed on faba bean plants in the field (in semi – field experiments), and by releasing diapaused pupae at the time of emergence in a cabbage field heavily infested by O. ramosa. Releasing the fly caused detectable increases in the percentage of infested O. crenta capsules to reach the maxima of 71.4% (releasing flies) and 100% (releasing spikes) after 4 weeks of release in semifield experiment of year 2000, and to 61.3% in the field experiment after two weeks of release opposed to 33.3% in a field that did not receive any release in the same village.
Publication year 2002
Pages 140-145
Availability location المعمل المركزى لبحوث الحشائش -9 ش الجامعة -مركز البحوث الزراعية -جيزة
Availability number
Organization Name
serial title 2nd International Conference, Plant protection Research Institut, Cairo, Egypt, 21-24 December, 2002
Author(s) from ARC
External authors (outside ARC)
    فوزي شلبي كلية الزراعة بمشتهر
Agris Categories Weeds and weed control
AGROVOC
TERMS		 Agromyzidae. Biological control. Diptera. Egypt. Phytomyza.
Publication Type Conference/Workshop
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