Efficacy of glyphosate herbicide against dodder and its impact on some biochemical parameters on host plant Nerium oleander L. and a survey of host range of some ornamentals at Fayoum
2011
Ali, I.H.H. | El-Yazal, M.A.
Post - attachment applications of glyphosate at low rates (200 and 400 ppm) controlled (86-90%) of attached dodder Cuscuta campestris Yunker on Nerium oleander L. after two months of the treatment without any phytotoxicity. Also glyphosate at the same rates reduced seed germination length and fresh weight of dodder. Moreover both glyphosate at the rates (200 and 400 ppm) increased leaf area leaf fresh weight and percentage of leaves dry weight of N. oleander as compared to the check. The obtained results also indicated that both rates of the herbicide markedly increased the leaf contents from total carbohydrate total reducing and non reducing sugars chlorophylls carotenoid xanthophylls prolin total indoles ascorbic acid and antioxidant enzymes activity in the leaves. On the contrary all dodder control treatments decreased free phenols in the leaves as compared to the check. On the other hand this parasite was found attacking eleven ornamental plants belonging to different families at Fayoum Governorate. Some of these hosts were new recording as susceptible hosts by C. campestris in Egypt. These new hosts included five ornamentals: Nerium oleander L. Adhatoda vasica L. Ficus nitida L. Ipomoea horsfalliae L. and Cestrum diurnum L.
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