Abstract
The whitebacked planthopper, Sogatella furcifera (Horváth) (Homoptera: Delphacidae), is emerging as a serious pest of rice in many countries. Because of the increased economic importance of the insect and the difficulty of controlling it with insecticides, incorporation of natural resistance to S. furcifera has become a major objective of the rice improvement programme at the International Rice Research Institute. Several research centres in national rice improvement programmes in India, Indonesia and Korea are also currently screening germplasm for resistance to S. furcifera. Literature documenting the status of research on varietal resistance and the current strategy in germplasm evaluation and breeding programme is reviewed. Rice varieties resistant in various countries and sources of resistance used in breeding are listed. Varieties with multiple resistance to different leafhopper and planthopper pests are also listed. The mechanism and the inheritance of resistance in rice varieties are reviewed. The possibility of biotype development is discussed and future strategies in such an eventuality are pointed out.
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