【摘要】 就一些粳稻抗性品种对褐稻虱(BPH)Nilaparvata lugens抗性进行了评价,水稻品种秀水48作感性品种对照。结果表明:1)褐稻虱在感性品种上分泌的蜜露面积显著地大于抗性品种;饲养在不同品种上褐稻虱一生产卵量(粒/(?)):秀水48为316.2,秀水620为191,嘉23为165.2,IR64为87.5;不同品种上褐稻虱若虫的存活率:秀水48为100％,秀水620为44％,嘉23为28.22％;相对取食量与抗性等级、田间累计虫量、若虫存活率及产卵量呈正相关。2)不同抗性品种上褐稻虱的种群增长率,秀水48为0.1221,秀水620为0.088,嘉23-2为0.083。3)供试品种上逻辑斯蒂模型的K值,秀水48为81.58,秀水620为30.54。4)本试验各品种对褐稻虱的内禀控制率(％),秀水48为0。秀水620为78.79,嘉23为84.94,IR64为0.8632。5)各品种对褐稻虱田间控制率(％),秀水48为0,秀水620为77.23,嘉23—2为76.68。更多还原

【Abstract】 The resistance indices of japonica varieties resistant to the brown planthopper (BPH), Nilaparvata lugens, are described, The rice variety Xiushui 48 was used as susceptible control. The results indicate: 1) The area of honeydew excreted by BPH was apparently greater on susceptible than that on resistant varieties. The number of eggs oviposited in the life-span of BPH on different rice varieties were: 316.2/female on Xiushui 48; 191.0/female on Xiushui 620; 165.2/female on Jia 23 and 87.5/female on IR64. The survival rates of BPH on different rice varieties were: Xiushui 48, 100%; Xiushui 620, 44% and Jia 23, 28.22%. There exist positive relationship between relative intake amount of BPH (Area of honeydew excreted by BPH) and resistance grade of rice variety, cumulative insect-days per hill, surviv- al rate, oviposition amount of BPH. 2) The rates of population increase of/BPH on different resistant va- rieties were 0.1221 on Xiushui 48; 0.0880 on Xiushui 620 and 0.0830 on Jia 23-2.3) The K values of logistic models on the tested varieties were: Xiushui 48, 81.58 and Xiushui 620, 30.54.4) The intrinsic control rate in this experiment was Xiushui 48, 81.58% and Xiushui 620, 30.54.4) The intrinsic IR64, 86.32%, 5) The field control rates of several varieties to BPH were: Xiushui 48, 0%; Xiushui 620, 77.23% and Jia 23-2, 76.68%.更多还原