|Title:||新育成抵抗褐飛蝨水稻品種（系）室內抗蟲反應及其田間表現||Other Titles:||Response of Chianon Shen 11 and Some Newly Developed Resistant Selections to Artificial and Natural Brown Planthopper Population||Authors:||鄭清煥
|Issue Date:||2-Dec-1976||Publisher:||農業試驗所||Journal Volume:||25||Journal Issue:||4||Start page/Pages:||259-268||Source:||中華農業研究||Abstract:||
The brown planthopper, Nilaparvata lugens is an important insect pest of rice in Taiwan. The traditional cultivars in this island are susceptible to this pest, therefore yield loss due to its damage are considerable. In order to reduce the pressure of’ the brown planthopper on rice production, a breeding program for development of brown planthopper-resistant variety have been established since 1969 in Chiayi Agricultural Experiment Station. The first resistant variety Chianon shen 11 was named and released for commercial cultivation in 1973. This paper reports some studies on the response of Chianon shen 11 and some other resistant selections to the artificial and natural brown planthopper population under laboratory and field conditions.
The mechanism of resistance of Chianon shen 11 and some resistant selections were identified as mainly due to the fact that the plants being not prefered by the insect. The resistant plants were also found to possessed a relative lower level of antibiotic factor that made the capability of the brown planthopper to survive, multiply and damage on the resistant plants. However, the resistant plants was more tolerance to the insect attacks than susceptible varieties T (N) 1 and Tainan 5. Under field conditions, the population density of brown planthopper on susceptible varieties increased with the growthstage of rice plant and several hundred insect per hill could be recorded after heading stage. On the other hand, the insect population on resistant varieties (selections) were very low throughout the crop season. As a result, while hopperburn appeared in the plots of Susceptible varieties, no appearent damage was observed in the resistant plants. Chemical protection to the susceptible varieties outyielded the unprotected about 35%, but the grain yield of resistant varieties (selections) with or without chemical protection were about the same. This indicated that the newly developed resistant variety can be used as a primary measure for protecting the rice plant from the damage of brown planthopper.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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