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MessagePosté le: Jeu 27 Oct - 07:57 (2016)    Sujet du message: Leaf Curl Of Papaya Pdf Download Répondre en citant

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Nearly 150 digital photos of more than 30 pests and diseases of papaya (Carica papaya) in Hawaii are provided here to help papaya growers diagnose their pest or disease problems. Philadelphia: The Blakiston Company, 1947. Copper-based mixtures (such as Bordeaux mixture) and lime sulfurs are two fungicides commonly used.[2][6] Peach cultivars can be planted which show some resistance to peach leaf curl, or at least regenerate rapidly, such as Peach Benedicte.[7] No similarly resistant nectarine cultivar is yet known. et al. HomeImage galleriesPapaya diseases . Nelson)[PDF] 2) Image gallery: (Giant) African snail (Achatina fulica): as a parasite of papaya stems1234 early stem injury1 advanced stem injury123 plant death12 snail eggs at base of stem1 as a parasite of papaya fruit1 fruit damage associated with snails andPhytophthora palmivorainfections12 text Anthracnose (Colletotrichum gloeosporiodes, fungus): sunken lesions with pinkish spore masses on fruits12345 atypical symptoms1 complete decay of fruit with spore masses1 Petri plates with fungal cultures (C. Once this happens, no treatment is effective. The tree usually produces a second flush of leaves that is rarely diseased, except in an unseasonably cool and wet spring, because the fungus is not infectious at the normally higher temperatures in late spring and early summer. For most images, the resolution and size is set at 150 DPI and (500 x 375) pixels to provide sufficient clarity and size to enable the recognition of the more subtle disease characteristics with confidence. Cookies are required to use this site.

^ DeQuattro, Jim, and Dennis Senft, and Marcia Wood. Peach leaf curl reduces the amount of leaves and fruit produced by peach and nectarine trees.[3] The disease costs the United States 2.5 to 3 million dollars annually.[3]. Specifically, for successful infection, the fungus requires cool and wet winters, where rain (not fog or dew) wets the tree for more than 12.5 hours at temperatures below 16C (61F).[4]. Oregon State University. 14 Apr 2009 . Copyright is not claimed for material provided by United States government employees as part of their work. Papaya leaf curl was first reported in Tamil Nadu in 1939. Some suggestions: Go back to the last page Go to the home page .. This USDA document describes a 5-year plan starting in 1992 to mitigate whiteflies.[9].

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