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Stem rot 2. Apple iOS Edition. Phytophthora palmivora To control this disease remove decayed tissues and dress with 10% Bordeaux paste. WARD, M. R. & GRIFFIN, M. J. The disease takes its greatest toll of plants in nurseries, particularly on low peat soils. bud rot causing premature nutfall. Record Number : 19251100775 Cut down and burn affected trees; do this as soon as the disease is seen. The treated portion should be given a protective covering with polythene sheet so as to prevent removal of the paste in the rains. Bud rot of coconut showing the collapse of the spear and younger leaves due to infection by Phytophthora palmivora, while the older leaves appear relatively healthy at this time. at this time. A foul smell occurs as the bud rots. isolated from the rot. It occurs commonly in west and east coasts of India. Photo 1. Leaf spot 8. Among the 173 fungal species reported on coconut, only a few are lethal, while others cause economic losses of varying degrees. Anthracnose 4. Slices from nuts (Photo 2) showing internal infections A disease of coconuts was described on Guam, with an unknown causal agent, called Tinangaja. The mobile application is available from the Google Play Store and Apple iTunes. 18. • In 1996, heavy incidence of bud rot disease was reported from Kuttiadi, in Kerala, leading to the destruction of thousands of coconut palms in that particular region. Phytophthora palmivora is the common cause of bud rot of mature palms worldwide. Android Edition Journal of Agricultural Research 32 , 471-498. Photo 2. Phytophthora water moulds survive in the soil and plant debris, probably in a dormant state as thick-walled spores ("chlamydospores"); these germinate producing spores ("sporangia") that are spread by wind, wind-driven rain and possibly by insects (see Fact Sheet no. Samoan German Crop Protection Project, Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) Gmbh, Germany. A different species, Phytophthora katsurae, occurs in the Caribbean and West Africa. Nuts are also attacked; if infections occur at the point of attachment to the flower stalk it may lead to premature nutfall (Photos 2&3). Causal organism: Phytophthora palmivora. Phytophthora palmivora has been reported as the causal organism of bud rot of coconuts in India. Malayan yellow and red dwarf varieties are susceptible to bud rot caused by Phytophthora palmivora, but hybrids with dwarf and tall parents are less so. In Samoa, it is limited to a mountainous, cool, wet area. Yellow to light brown, sunken patches occur on the leaf stalks. The disease is caused by a fungus. Note, there may be more than one species of Phytophthora in the Pacific islands causing bud rot. However, after a few months they dry out and fall. Photos 2-5 Kohler F, Pellegrin F, Jackson G, McKenzie E (1997) Diseases of cultivated crops in Pacific Island countries. Basal stem rot of coconut seedling, caused by Phytophthora palmivora. Bud rot. The affected young leaf whorl can be easily pulled off. Mostly, the disease affects young palms, under 5 years. Outbreaks of a seedling bud rot caused by Phytophthora palmivora have been recorded from coconut nurseries in Vanuatu. Lasiodiplodia theobromae was identified as the major causal organism of rotting and nut fall of eriophyid mite infested coconut. Seedlings are also infected and killed (Photos 4&5). CULTURAL CONTROLCultural control is particularly important in the management of this disease: RESISTANT VARIETIESTolerance to bud rot varies between varieties. Goss's bacterial wilt and leaf blight was first identified in three fields in Dawson County near Lexington in 1969. Look to see that the outer leaves remain green for some months after the (1981). coconut in Bangladesh [3-5]. older leaves appear relatively healthy Traditional crop plants of the Pacific Islands are plagued by a number of important diseases. The root (wilt) affected coconut are susceptible to diseases such as leaf rot and pests such as rhinoceros beetle and red palm weevil. Groundnut bud necrosis disease mINOR DISEASES 1. Coconut bud rot may appear at any time of the year, but is found more commonly a month or two after periods of heavy rains. Found across much of the tropic and subtropical area, the coconut is known for its great versatility as seen in the many An attempt has been made to evaluate some fungicides in Photo 3. Full text of "The bud-rot of the coconut palm" See other formats Historic, arcinived document Do not assume content reflects current scientific knowledge, policies, or practices Issued July 9, U. S. DEPARTMENT OF AGRICULTURE, BUREAU OF PLANT INDUSTRY— Circular No. Since the affected part is the fruit, its incidence causes considerable loss in yield. Systemic products: Phosphorus acid (as potassium phosphonate) and metalaxyl have also been recommended and, in the Ivory Coast, a commercial injector is used to apply these products, and to manage epidemics of the disease. To isolate the causal organism of soft rot of vegetables d,iseased samples of potato, tomato, carrot, chilies, and bell pepper, were analyzed in the lab, using nutrient agar (NA) and/or the enrichment host (Bell pepper) technique Bud rot, a fatal disease of coconut caused by Phytophthora palmivora (Butl.) 36. This organism Orchard sanitation through removal of dry material from the crown is also essential. Bud necrosis disease (BND), caused by peanut bud necrosis virus (PBNV) is an important disease of peanut (Arachis hypogaea L.) in India. 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