番茄肥害症狀 番fan茄qie發fa生sheng肥fei害hai初chu期qi,葉ye片pian表biao麵mian出chu現xian褪tui綠lv的de白bai色se或huo灰hui白bai色se不bu規gui則ze斑ban點dian,隨sui病bing情qing發fa展zhan,斑ban點dian擴kuo大da。葉ye片pian上shang有you的de枯ku斑ban邊bian緣yuan為wei灰hui白bai色se,內nei部bu葉ye肉rou來lai不bu及ji褪tui綠lv,呈cheng顏yan色se較jiao深shen的de枯ku綠lv色se,後hou期qi穿chuan孔kong。與病害不同的是,枯斑不會無限擴大。在高溫、幹旱條件下病情發展十分迅速,葉緣枯焦。
防治措施 番fan茄qie肥fei害hai產chan生sheng的de原yuan因yin主zhu要yao是shi化hua肥fei一yi次ci施shi用yong量liang過guo大da,根gen係xi受shou害hai,吸xi收shou功gong能neng降jiang低di,使shi葉ye片pian受shou到dao影ying響xiang,導dao致zhi肥fei害hai。番fan茄qie發fa生sheng肥fei害hai不bu僅jin造zao成cheng大da量liang的de浪lang費fei,而er且qie還hai影ying響xiang番fan茄qie的de正zheng常chang生sheng長chang,防fang治zhi番fan茄qie病bing害hai應ying提ti前qian動dong手shou。根gen據ju番fan茄qie不bu同tong生sheng長chang期qi對dui肥fei料liao的de需xu求qiu不bu同tong進jin行xing測ce土tu配pei方fang施shi肥fei,避bi免mian使shi用yong單dan一yi肥fei料liao,施shi肥fei要yao均jun勻yun,施shi肥fei後hou應ying立li即ji澆jiao水shui或huo隨sui水shui施shi肥fei,使shi肥fei料liao盡jin快kuai溶rong解jie到dao土tu壤rang中zhong,降jiang低di了le肥fei料liao的de濃nong度du,有you利li於yu番fan茄qie的de吸xi收shou。增zeng施shi有you機ji肥fei,盡jin量liang減jian少shao化hua肥fei用yong量liang,增zeng施shi有you機ji肥fei料liao,有you條tiao件jian的de可ke以yi把ba生sheng物wu菌jun肥fei配pei合he有you機ji肥fei施shi用yong。
補救措施 出現肥害症狀後立即澆水,一般澆水2-3次後肥害即可解除,同時噴施“天達-2116”等植物營養液,增強番茄的抵抗力。
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