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叶斑(褐斑、黑斑)病是花生生产上普遍发生的病害,发病株率85%左右,尤在高温、多湿境遇下更易感染,致使底叶脱尽,甚至整株枯死,一般减产4%,严重的达30%以上,由于病害以气流传播为主,所以研究花生叶斑病菌孢子空中流量与田间病情的消长规律,可为及时预防病害的发生与蔓延,提供理论依据.一、材料和方法试验在花生品种资源圃内进行.空中孢子捕捉仪用长3.5尺,宽0.2尺,厚0.15尺的木杆制成,每隔0.5尺处,以东,南、西、北四个方向凿一小槽(以卡紧玻片为度).
Leaf spot (brown spots, dark spots) disease is a common occurrence of peanut diseases, the incidence of about 85% of the plants, especially in hot, wet conditions more susceptible to infection, resulting in bottom leaves exhausted, and even the whole plant dead, the general cut 4 %, Severe up to 30%, due to disease spread to the main air, so the spores of peanut leaf spot spores air flow and field growth and decline of law, for the timely prevention of the occurrence and spread of disease, provide a theoretical basis. And methodological tests were carried out in the Peanut Variety Resource Center.The aerial spore catcher was made of wood rods of 3.5 feet in length, 0.2 feet in width and 0.15 feet in thickness. Every 0.5 feet, four directions of east, south, west and north Chisel a small slot (in order to card slide for the degree).