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广东省西南部南方水稻黑条矮缩病越冬调查初报

2014-04-29陈冰颜松毅梁盛铭陈观浩

农学学报 2014年3期

陈冰 颜松毅 梁盛铭 陈观浩

摘 要:摸清南方水稻黑条矮缩病病原越冬情况,为南方水稻黑条矮缩病的预测预报和综合治理提供科学依据。2013年3—4月采用普查和抽查相结合的方法,对地处广东省西南部的化州市南方水稻黑条矮缩病病原越冬情况进行调查和研究。结果表明:化州市存在大面积、高密度的南方水稻黑条矮缩病越冬区域,越冬面积0.37万hm2,平均病丛率13.3%,最高达68.3%。初步分析出该年度再生稻发生南方水稻黑条矮缩病与气候条件和上年田间病毒源有关。明确了南方水稻黑条矮缩病在化州地区冬季再生稻可顺利越冬,研究结果可为南方水稻黑条矮缩病的有效防治提供技术支撑。

关键词:南方水稻黑条矮缩病;越冬;再生稻;白背飞虱

中图分类号:S435.111.4 文献标志码:A 论文编号:2013-0591

A Preliminary Investigation on Southern Rice Black-streaked Dwarf Virus Overwintering

in Southwest Guangdong

Chen Bing1, Yan Songyi1, Liang Shengming2, Chen Guanhao2

(1Meteorological Bureau of Huazhou, Huazhou 525100, Guangzhou, China;

2Forecast Station of Plant Diseas and Insect Pests of Huazhou, Huazhou 525100, Guangzhou, China)

Abstract: Ascertain the southern rice black-streaked dwarf virus overwintering conditions, which is conducive to provide scientific basis of the prediction and comprehensive management for the rice. In this paper, the author carried out census and spot check combination method to study the SRBSDV overwintering in Huazhou, Guangdong Province from March to April in 2013. The results illustrated that, there was a large and high-density overwintering area about 0.37×104 hm2 in Huazhou, and the average diseased bundle rate was 13.3% while the highest was up to 68.3%. This paper also showed that, the SRBSDV occurrence of the ratooning rice was related to the climate condition and the previous year field virus source. It confirmed that the SRBSDV could overwintering successfully while parasitizing winter ratoon rice in Huazhou, which provided technical support for the SRBSDV prevention.

Key words: SRBSDV; Overwintering; Ratoon; Sogatella furcifera

0 引言

南方水稻黑条矮缩病(southern rice black-streaked dwarf υirus,SRBSDV)是近年来在中国新发现的由白背飞虱传播的水稻病毒病[1-2]。近几年,该病在化州市发生面积迅速扩大,为害程度明显加重,已成为化州市水稻的主要病害,严重威胁水稻生产安全。为更好地开展南方水稻黑条矮缩病的预报和有效治理,明确南方水稻黑条矮缩病在广东省西南部越冬以及越冬毒源的数量和作用至关重要。南方水稻黑条矮缩病是由华南农业大学周国辉教授于2008年鉴定并命名的一种水稻病毒病,属呼肠孤病毒科(Reoυiridae)斐济病毒属(Fijiυirus)第2组的一个新种[1],他分析了该病发生特点和危害趋势[2]。刘万才等[3]和郭荣等[4]分析了南方水稻黑条矮缩病发生现状,并提出了防控对策。……

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