獼猴桃枝枯病,也叫失水性枝枯病,是一種由氣候因素引起的生理性病害,是在果樹沒有人為造成肥害或藥害,以及病理性根腐病、枝腐病、潰瘍病等情況下,發生的結果枝或營養枝突然萎蔫枯死現象。
一、發病症狀 zhuyaozaishuguanwaiweibujieguozhichuxianzhitiaoyepianweinian,jierzhengzhishishuikusi,danjieguomuzhizhengchang。zaiyigeyuanzhong,zhengyuanhuozhengzhufabingjiaoshao,wangwangshijubuyuanhuoyizhushangjubuzhichuxianzhiku。
二、發病時間 一般發生在獼猴桃新梢迅速抽生期,即4-5月春夏交替期。此期北方地區在春旱情況下,往往是幹熱風盛行期,給獼猴桃這種闊葉果樹帶來一定影響。
三、發病規律 一般在春季持續性幹旱時易誘發此病。發生的兩個條件:一是春旱,二是強風。在春旱情況下,若出現6級以上強風,持續5小時以上,獼猴桃樹即可發病。4年nian以yi上shang未wei遮zhe陰yin封feng行xing的de幼you齡ling果guo樹shu發fa病bing較jiao重zhong,因yin為wei該gai樹shu齡ling期qi樹shu生sheng長chang勢shi較jiao強qiang,對dui水shui分fen要yao求qiu較jiao迫po切qie,而er根gen係xi分fen布bu較jiao淺qian,吸xi收shou功gong能neng有you限xian,抗kang旱han性xing相xiang對dui較jiao差cha,一yi旦dan強qiang風feng天tian氣qi出chu現xian,發fa病bing嚴yan重zhong。南nan北bei行xing果guo園yuan受shou害hai較jiao重zhong,東dong西xi行xing向xiang次ci之zhi,邊bian圍wei行xing嚴yan重zhong,園yuan內nei行xing次ci之zhi。其qi原yuan因yin在zai於yu關guan中zhong地di區qu春chun夏xia東dong西xi風feng向xiang居ju多duo,不bu同tong行xing向xiang內nei外wai樹shu行xing受shou風feng麵mian受shou風feng力li不bu一yi所suo致zhi。另ling外wai,處chu於yu風feng口kou地di區qu或huo零ling散san果guo園yuan受shou害hai較jiao重zhong,相xiang對dui集ji中zhong連lian片pian園yuan或huo避bi風feng園yuan很hen少shao發fa生sheng,此ci與yu受shou風feng強qiang度du直zhi接jie關guan聯lian。
四、防治措施 yishizaozhaixin。zhuyaozhenduiwaiweijieguozhikongzhidingduanyoushi,jiasuzhitiaomuzhihua,jianshaoyingfengmian,tigaokangfengxing。ershiguifanbangzhi。dongjianhoujieguomuzhibixuzhizhibangfu,qiepailieyouxu,dujuejiaochazhongdieyongji,yifangjieguozhichoushenghoukongjianjuxianmijishengchang,yufengyiwei,zengjiamoca,zaochengshangkou,kangfengnenglixiajiang。sanshizhuyiguanshui。youqizaichunhanfenghaiyanzhongqingkuangxia,tichangguanshui,yijianhuanqiangfengxingchengdedimianzhengfajiyemianzhengtengjiadaduishutishuifenshenglipinghengdepohuai。
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