縞葉枯病對水稻產量之影響

Assessment the Rice Yield Reduction Caused by Infection of Rice Stripe Virus

邱明德(Ming-Teh Chiu)

《高雄區農業改良場研究彙報》 13卷1期 (2001/12) Pp. 1-9

https://doi.org/10.6958/RBKDAIS.200112.0001

摘要

七十四年第一期作單本植盆栽接種試驗結果台南5號插秧後15，30，45，60及75日接種水稻縞葉枯病毒之罹病株產量損失分別為100，100，100，82及74%；台農67號分別為100，100，100，75及60%。相同試驗七十四年第二期作以台農67號試驗結果插秧後15，30，45，60及75日接種之植株產量損失分別為100，90，48，42及35%；七十五年一期作分別為100，100，100，91及50%。田間多本植接種試驗七十五年第一期作試驗結果台南5號插秧後15，30，45及60日接種引起產量損失率分別為100%，92%，49%及16%；台農67號則分別引起100、78、53及23%。相同試驗七十五年第二期作試驗結果台南5號插秧後15，30，45，60及75日接種引起產量損失率分別為100，99，60，43及37%；台農67號則分別引起100，93，65，54及38%之產量損失。七十五年第一期作調查田間水稻縞葉枯病病徵出現時期與產量損失之關係，結果顯示插秧後55日（分蘗盛期）、67－88日（孕穗期）、98日（抽穗期）、110日（乳熟期）、118日（糊熟期）及141日（黃熟期）發病之罹病株產量損失分別為88、78、77、58、39及27%。插秧期對水稻產量損失之影響於75年第二期作假旗南分場進行，結果早植稻比中、晚植稻罹病率高，其罹病率分別為68.0、17.7及4.7%，顯然早植稻之水稻產量損失較中、晚植稻嚴重。

關鍵字

稻縞葉枯病 ； 感染時期 ； 產量損失

並列摘要

Tainan 5 and Tainung 67 were single-plant transplanted and inoculated with rice stripe virus by viruliferous small brown planthoppers at different growth stages to study the effect of virus infection on rice yield. The experiments were conducted in pot under screenhouse conditions in the 1st and 2nd crop seasons of 1985 at Kaohsiung District Agricultural Improvement Station (DAIS). In the 1st crop season 1985, the test plants inoculation with RSV at 15, 30, 45, 60 and 75 days after transplanting(DAT) resulted in 100, 100 ,100, 82 and 74% losses of rice yield for Tainan 5 and 100, 100, 100, 75 and 60% for Tainung 67. In the 2nd crop season of 1985, Tainung 67 inoculation with RSV at 15, 30, 45, 60 and 75 DAT resulted in 100, 90, 48, 45 and 35% losses of the rice yield, In the 1st crop season 1986, Tainung 67 inoculated with RSV at 15, 30, 45, 60 and 75 DAT resulted in 100, 100, 100, 91 and 50% yield losses respectively. Similar experiments conducted in the field at Kaohsiung DAIS in the 2nd crop season of 1986, test plants inoculated with RSV at 15, 30, 45, 60 and 75 DAT resulted in 100, 99, 60, 43 and 37% losses of rice yield for Tainan 5 and 100, 93, 65, 54 and 38% for Tainung 67. In the 1st crop season of 1986, the effect of rice stripe disease symptom expression stage on the yield of naturally infected plants was studied. Tainung 67 was planted at 7 plants per hill and infected plants were tagged, individually, the yield reduction was 88, 78, 77, 58, 39 and 27% when symptoms appeared at 55 DAT (maximum tillering stage), 67-88 DAT (booting stage), 98DAT(heading stage), 110 DAT(milking stage), 118 DAT(dough stage) and 141 DAT(ripening stage)respectively. In the 2nd crop season of 1986, seedling transplating stage effect on the susceptibility of RSV of rice plants was evaluated at Chie-nan branched station of Kaohsiung DAIS, results indicated the infection rate of RSV of early transplanting , middle transplanting and latter transplanting plants were 68.0, 17.7 and 4.7% respectively. Apparantly the rice seedling transplanting at earlier stage caused higher infection of RSV and resulted in serious yield losses.

並列關鍵字

Rice stripe disease ； Infection stage ； Yield reduction