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Phytophthora fragariae (strawberry red stele root rot) Kavanagh et al. (1986) reported that of six fungicidal treatments tested on strawberries (chlorothalonil, dichlofluanid, iprodione flowable,...
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Phytophthora katsurae (chestnut downy mildew) P. katsurae has a high economic impact because of its role in coconut diseases. The damage depends on the planting material, but the death rate...
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Phytophthora megasperma (root rot) P. megasperma is considered a major pathogen of apples in New York State, USA (Jeffers et al., 1982) and in New Zealand (Robertson and Dance, 1971)...
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Phytophthora nicotianae (black shank) Black shank occurs worldwide, but is most severe in warmer climates. Losses occur during all stages of development and can reach 100% in some...
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Peronospora hyoscyami f.sp. tabacina (blue mould of tobacco) Blue mould is currently a very important disease of tobacco worldwide, because of its great capacity to reduce yields. Severe early attacks can...
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Phytophthora cambivora (root rot of forest trees) P. cambivora is an invasive species that persists and spreads in different environments. Its invasiveness is increased by its capacity to survive...
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Phytophthora colocasiae (taro leaf blight) This disease can lead to a 30-40% crop loss in heavily infected taro fields (Jackson et al., 1975). The fungus is widespread in South-East Asia and...
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Phytophthora palmivora (coconut budrot) In 1985, worldwide losses of cocoa due to black pod and stem canker were estimated at £1.54 billion (Evans and Prior, 1987) and recent estimate...
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Pseudoperonospora cubensis (cucumber downy mildew) Quantitative data on losses caused by downy mildew are rare. However, it is widely held that the disease is a limiting factor in crop production in...
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Phytophthora infestans (Phytophthora blight) Introduction Late blight of potatoes or tomatoes can be a devastating disease with dramatic and disastrous economic consequences. It...
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