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1973年在嘉兴地区晚稻穗瘟仍是大流行的一年,发病面积比1972年扩大。但由于各地大力采取以农业防治为基础结合进行药剂防治的综合措施,基本上控制了穗瘟猖獗成灾,为确保晚稻丰收起了一定的作用。稻瘟病的流行必须有稻体内诱病因素的增大、侵染性病原物的大量积累和适于病菌繁殖侵染的气候条件三者的相互配合。1973年晚稻穗瘟之所以酿成流行,主要也是这三个因素同时得到满足引起的,而发病特点是发病面广,为害期长,发生较迟,迟插田重于早插田。
In 1973, the rice blast in the area of Jiaxing was still a pandemic for a year, and its area of incidence expanded more than in 1972. However, due to the vigorous adoption of comprehensive prevention and control measures based on agricultural prevention and control in all parts of the country, the control of pandemic epidemic has basically been brought under control. This has played a certain role in ensuring the harvest of late rice. The prevalence of rice blast must have the combination of the increase of the disease-inducing factors in rice, the accumulation of infectious pathogens and the climatic conditions suitable for the propagation of germs. The reason why the late rice blast caused epidemic in late 1973 was mainly caused by the simultaneous satisfaction of these three factors.