贵州新引进柑橘品种对炭疽病的抗性鉴定

Identification of Disease Resistance of Different Introduced Citrus Varieties to Anthracnose in Guizhou

为明确贵州新引进的14个柑橘品种对炭疽病的抗病能力,采用离体叶片法测定了其对柑橘炭疽病的抗病性。结果表明,14个参试柑橘品种在接种4d和5d后,抗病性存在差异。其中,天草在接种4d和5d后的病情指数分别为0和0.46,佛拉的病情指数分别为52.78、79.17,濑户佳的病情指数分别为1.85、2.78,若瓦的病情指数分别为4.63、9.26。2次的调查结果都说明天草的病情指数最小,抗病性最强,表现为免疫或高抗;佛拉的病情指数最大,抗病性最弱,表现为感病;濑户佳、若瓦均表现高抗。

The detached leaf disease resistance identification method was used to assess the resis-tance of 14 kinds of introduced citrus varieties to citrus anthracnose in Guizhou.The results showed that there were some differencees between the 14 kinds of citrus cultivars in disease resistance at 4 and 5 days after inoculation.The disease index of Amakusa was 0 and 0.46,Fola was 52.78 and 79.17,Setoka was 1.85 and 2.78,Nova was 4.63 and 9.26,respectively,after 4 and 5 days.The results of two surveys revealed that the disease index of Amakusa was the minimum,and its disease resistance was the strongest,showing immunity or high resistance.The disease index of Fola was the maximum,and its disease resistance was the weakest,showing high susceptibility.Setoka and Nova were all highly resistant.