DISTRIBUTION MAPS OF SOME FUNGAL TOMATO DISEASES UNDER CLIMATE CHANGE CONDITIONS IN EGYPT

Abstract

Tomato is vulnerable to infection by number of diseases, the most important of which are the fungal diseases such as early blight, powdery mildew and late blight. This research aimed to study the relationship between climate change and disease severity for prediction in future seasons. Diseases severity of early blight, late blight and powdery mildew diseases was recorded for three growing seasons i.e. summer (May. - Aug), autumn (Jul. - Oct) and winter (Nov. - Mar.), at three governorates (Behira, Ismailia, and Assuit). The severity of diseases on tomato has been predicted by regression estimated accumulative disease severity values during (2007/2008) – (2015/2016) season and through the average max and min temperature and humidity through these seasons. Prediction of disease has been formed as Y= b0+b1x1+b2x2+.......... bqxq. Three models were created to describe the severity disease by multiple regressions (MINITAB® program).