pipashupiguanghuarounen,hanshuiliangjiaoduo,xiajishoulierizhaoshe,shishuganrenpibujubuxibaoshishui,chuqibingbushupiganbieaoxian,suihoukailieqiqiao,zhujiankuoda,xingchengxiangdangdadejiaoban,shendamuzhibu,sihuoshaozhuang,bingbanhuo 病bing株zhu往wang往wang成cheng為wei病bing蟲chong感gan染ran和he產chan卵luan越yue冬dong場chang所suo。果guo實shi發fa生sheng日ri燒shao多duo在zai陽yang麵mian由you果guo皮pi直zhi到dao果guo肉rou灼zhuo癟bie,病bing部bu呈cheng黑hei褐he色se凹ao陷xian,失shi去qu食shi用yong價jia值zhi,且qie以yi後hou往wang往wang導dao致zhi炭tan疽ju病bing的de發fa生sheng。
日燒屬於生理病害,往往發生在枇杷果實成熟前的轉色期。這一階段日平均溫度一般為18~22℃。在無風或有微風的晴天,氣溫驟升高達30~35℃,受陽光直接照射的果實及枝幹易發生日燒,一般樹冠外圍的果實比樹冠內膛或葉叢中的果實更易發生日燒。
防fang治zhi日ri燒shao首shou先xian是shi要yao培pei養yang合he理li的de樹shu冠guan,使shi樹shu幹gan不bu暴bao露lu在zai直zhi射she的de陽yang光guang下xia。在zai夏xia季ji對dui那na些xie易yi受shou陽yang光guang直zhi射she的de枝zhi幹gan塗tu白bai,或huo縛fu草cao於yu樹shu幹gan上shang以yi遮zhe光guang。在zai果guo實shi轉zhuan色se前qian,疏shu果guo後hou套tao袋dai,或huo遇yu高gao溫wen天tian氣qi,於yu午wu前qian對dui樹shu冠guan噴pen水shui均jun能neng有you效xiao地di防fang止zhi果guo實shi日ri燒shao。
lieguowangwangfashengzaiguoshipengdaqi,ruqianqijiuqingshaoyu,turangganhan,turanjiangdayu,guoyuanpaishuibuliangshi,guorouxibaoxunsupengda,guopipolie,zaochenglieguo,shiguoshishiqushangpinjiazhi,erqiejiyiyinqiqitabingjunjishenghekunchongweihai,youfaqitabingchonghai,cibingduofashengzaishengchangwangshengpinzhongjishushiqiangdezhizhu。guopijiaobodepinzhonghuozaipeiditucengguobohuobaoshuibaofeilijiaochadeshazhitu,yechangyifashenglieguo。
預防裂果的措施:一是選擇不易裂果的品種;二是做好抗旱工作,並逐年增厚土層,增加土壤有機質,以增加土壤保水保肥能力;三是在幼果膨大期進行多次根外噴施尿素和磷酸二氫鉀,能減少裂果,在果實轉青白色期噴乙烯利800~1200倍液,有明顯的預防效果,而且可以提早成熟7~10天。在果實疏果後套袋,也可有效地預防裂果。
枇杷根淺,葉大易遭風害。常被台風吹倒,因此在7~9月份台風頻襲期間,於台風登陸前用樹樁、繩索將枇杷樹固定,包可用石塊壓根部,以防台風吹倒,但防止台風的根本辦法是營造防護林。
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