Effects of Soil Fertility Management and Trichoderma asperellum on Severity of Wilt Disease of Passion Fruits

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Date
2010
Authors
David M T
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David M T
Abstract
Passionfruit is the third most important export fruit crop in Kenya after mango and avocado. Plant diseases are the main constraint to passionfruit production resulting in 40 to 100% yield losses. Passionfruit wilt disease caused by Fusarium oxysporum f. sp passiflorae is of economic importance in Kenya. Management of this disease is difficult because the pathogen persists in the soil for many years. Chemical controls are expensive and in most cases not effective. The most economical control method is the use of tolerant rootstocks, such as the yellow passionfruit, which however succumbs to the disease in some cases. This study was conducted to investigate effects of soil fertility management and application of Trichoderma asperel/um on control of passionfruit wilt disease. In the first experiment, soils managed under organic, integrated and virgin systems were collected from farmers' fields and used to set up a bioassay in a greenhouse using the purple passionfruit seedlings.
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