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Erysiphe Cichoracearum Is The Main Causal Agent Of Cucurbit Powdery Mildew In El-Jabal Al-Akhtar Region – Libya
S.S. El-Ammari (1), and G. I. Fadiel (2).
(1)Department of Botany, Faculty of Science, University of Garyounis, Benghazi, Libya.
(2) Department of Plant Protection, Faculty of Agriculture, Omar Al-Moktar University, El-Beida, Libya.
Abstract
Based on conidial characters, (Presence or absence of fibrosin bodies and shape of germ tube) Erysiphe cichoracearum and Sphaerotheca fuliginea were identified as the caused agents of cucurbit powdery mildew in El-Jabal Al-Akhtar region. In four cultivated areas in the region, S. fuliginea was detected only in El-Arega area with 10% incidence on pumpkin and in El-Marg area with 20% incidence on indoor cucumbers, which representing is a very low incidence compared to E. cichoracearum, which is considered the predominant powdery mildew causal agent on cucumber, squash, cantaloupe, pumpkin and snake cucumber in the region. Only watermelon was free of infection.
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