辽宁地区苹果炭疽病发生规律和防治研究

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在辽宁地区,苹果炭疽病菌主要以菌丝在苹果树上的小僵果、死果台、粗皮、爆皮枝等部位越冬。翌年在适宜温湿度条件下产生分生孢子,进行传播侵染。越冬后的分生孢子已失去萌发力,落地病果在初侵染中不起什么作用。病菌可以直接穿透表皮侵入果实。苹果在幼果期即感病,此时不抗侵入但抗扩展,潜育期长达一个月左右。七月中旬以后病害大量发生,直至9月中旬持续为害。根据果园中病菌孢子出现期,约在6月15至25日喷施第一次药,以后每隔20天左右连续喷施160~200倍波尔多液或锌铜石灰液三次,可以有效地控制炭疽病的为害。1964年和1965年,在辽宁地区进行大面积防治试验表明效果良好,可以大面积推广。 In Liaoning Province, apple anthracnose mainly in the apple tree mycelium small dead fruit, dead fruit Taiwan, bark, bark branches and other parts of the winter. The following year in the appropriate conditions of temperature and humidity produce conidia, spread infection. After the winter conidia have lost the germination force, the floor disease in the initial infection can not afford any effect. Germs can penetrate the skin directly into the fruit. Apple in the young fruit that is susceptible, but not anti-invasive anti-expansion, the incubation period of up to a month or so. A large number of diseases occurred after mid-July and continued to be harmful until mid-September. According to the orchard in the emergence of spores of bacteria in about June 15 to 25, spraying the first drug, after every 20 days or so continuous spraying of 160 to 200 times Bordeaux mixture or zinc copper lime liquid three times, you can effectively control anthrax Disease damage. In 1964 and 1965, a large-scale prevention and control experiment in Liaoning Province showed that the effect was good and could be popularized in a large area.
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