Broomrape (Orobanche ramosa) on apricot (Prunus armeniaca) in Iraq
1989
Al-Khazarji, T.O. | Ishaak, E.Y. | Hameed, K.M.
This study is the first report of broomrape (Orobanche ramosa L.) parasitizing apricots (Prunus armeniaca L.) in orchards near the city of Irbil, Northern Iraq. Incidence of O. ramosa parasitism on apricots increased from 10% in 1986 to 16% in 1987. Infection was very severe and it reached 200 Orobanche plants per apricot tree in the Orchards under study. O. ramosa has only one annual life cycle on apricot trees and it significantly reduced total yield, fruits fresh and dry weight and fruit size in parasitized as compared to healthy trees. Four herbicides, Lancer, Gramaxone, Treflan and Formalin (used at recommended rates except for Formalin which was used by adding one volume of 40% Formalin to 50 volumes of water and applied under a plastic cover) were tested by watering the emerging broomrape plants with the chemicals. Lancer and Formalin were very effective in controlling broomrape. However, Formalin produced some phytotoxic effects on apricots but the apricot tree recovered later
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