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2001年西安地区猕猴桃普遍发生一种新病害,致使上年结果枝大量腐烂、枯死,严重影响了新枝的萌发,对猕猴桃生产造成极大威胁,广大果农十分焦急,为此,我们开展了大量调查研究工作,现将初步调研情况汇总如下,以供交流参考。 1 新病害症状 该病最早发现于2001年2月13日,最初发病部位主要集中在上年结果枝上距基部约20厘米的结果部位。早期枝条外部症状不明显,但此时皮下已发生严重病变,病部皮层淡水渍状、浅褐色,用手
In 2001, a new disease occurred commonly in kiwifruit in Xi’an, resulting in a large number of decay and death in the last year, which seriously affected the germination of new shoots and posed a great threat to the production of kiwifruit. The majority of farmers were anxious. Therefore, we conducted a large number of investigations Research work, the preliminary investigation is summarized below, for the exchange of reference. A new disease symptoms The disease was first discovered in February 13, 2001, the initial site of the disease was mainly concentrated in the results of the previous year about 20 cm from the base of the results of the site. Early symptoms of external branches is not obvious, but at this time there have been serious subcutaneous lesions, diseased cortex freshwater-like, light brown, hand