Hama Wereng Coklat Padi: Perkembangan Biotipe, Mekanisme dan Genetika Ketahanan Varietas
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Date
1998
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Balai Penelitian Bioteknologi Tanaman Pangan
Abstract
Rice Brown Planthopper: It's Biotype Development and Genetics and Mechanism of Plant Resistance. I.H. Somantri. Brown planthopper, Nilaparvata lugens Stal., is one of the major insect pests of rice in Indonesia. The insect has the capability to change and form new biotypes. Population of the insect in the field is therefore very dynamic and continuously changing. Factor such as use of narrow variation in monogenic resistance gene, use of susceptible varieties, continuous rice planting, availability of alternative host plants, over dosage nitrogen fertilizer application, and misuse of insecticides have contributed to development of new biotypes. At present the resistance to brown planthopper in rice are known to be controlled by either mono or oligogenic
resistance genes. More researches are needed to identify the presence of polygenic resistance genes that can be utilize in breeding of rice for resistance to the brown planthopper.
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Keywords
Rice brown planthopper, Nilaparvata lugens, biotypes development, genetic and mechanism of plant resistance.