Spatial distribution pattern for the Fusarium wilt disease in banana field and the Fusarium oxyporum f.sp.cubense in different parts of banana plants

The objectives of this work were to clarify the spatial distribution pattern for the Fusarium wilt disease in the banana field and the amounts of Fusarium oxyporum f. sp. cubense population inside the banana plants. An investigation was conducted on the diseased plants in banana field. The spatial distribution pattern of the Fusarium wilt disease in banana field was studied by determination of frequency distribution,aggregated indices,the Taylor' s power law and Iwao' sregression equation. The reasons for the aggregation of the Fusarium wilt disease in banana field was analyzed according to estimation by aggregation mean [lambda]. Meanwhile,comparative investigation was conducted on the amounts of the pathogen inside the healthy plants and diseased plants. Results indicated that the diseased plants in banana field belong to negativebinomial distribution and neyman distribution,and the aggregated indices of diseased plants met C1,I0,m*/ m1,CA0,K0,so they presented pattern of aggregation distribution,and the fu