The Relationship between Climate and Rice False Smut Occurrence and its Prevention and Control Techniques in Southern Mountain Area of Zhejiang Province

doi:10.3969/j.issn.1006-8082.2018.05.020

Abstract

Abstract:

The occurrence rules and harm rules of rice false smut （RFS）（Ustilaginoidea virens）, and it’s prevention and control techniques were made clear through 10 years observation, investigation combine with field trials. Zhongzheyou 1, Zhongzheyou 8 and Yongyou 1540 have good resistance to RFS in the field and suitable for planting in the southern mountain area of Zhejiang province. The occurrence degree of RFS is closely related to the climatic conditions from the period of booting-heading to early filling, the condition with suitable temperature （26℃~28℃） and high humidity （RH over 80%） are particularly favorable for the occurrence of RFS. The fertilizer application dosage, especially nitrogen fertilizer application dosage had a great influence on the occurrence of RFS. The varieties with big panicle and more spikelets are susceptible to RFS. Spraying two times of pesticides is best for prevention RFS, and the better way is alternate apply the pesticides in two spray times.

Key words: rice false smut, occurrence degree, climate, varieties, chemical control, control efficiency

摘要：

通过10年的观察、调研，并结合田间试验，明确了浙南山区青田县水稻稻曲病发生、为害规律，防控技术和方法。结果表明，中浙优1号、中浙优8号、甬优1540等品种在田间能较好抗（耐）稻曲病，适宜在浙南山区种植；稻曲病的发生程度与孕穗-破口期至灌浆初期的气候条件密切相关，适温（26℃~28℃）高湿（80%以上）条件特别有利于该病害发生；施肥特别是氮肥对稻曲病有加重或减轻作用；穗大粒多着粒密度大的品种（组合）易感稻曲病。防治稻曲病以打2次药预防效果最好，防治药剂最好轮换使用。

关键词: 稻曲病, 发生程度, 气候, 品种, 防治药剂, 防治效果

CLC Number:

S435.111.4+6

饶汉宗1,谢子正2,李阳3,石磊4,黄世文5*. 浙南山区单季杂交稻稻曲病发生与气候的关系及防控[J]. 中国稻米, DOI: 10.3969/j.issn.1006-8082.2018.05.020 .

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