1.發(fā)病癥狀如圖5-6-1所示。葉片正面葉片背面圖5-6-1葉片缺錳癥狀2.識(shí)別與防治要點(diǎn)見(jiàn)表5-6。表5-6缺錳癥識(shí)別與防治要點(diǎn)發(fā)病部位葉片發(fā)病條件堿性土或沙土,土質(zhì)黏重、通氣不良、地下水位高的土壤容易缺錳發(fā)病癥狀新梢基部葉片變...[繼續(xù)閱讀]

    1.發(fā)病癥狀如圖5-7-1、圖5-7-2所示圖5-7-1新梢缺硼癥狀圖5-7-2果實(shí)缺硼癥狀2.識(shí)別與防治要點(diǎn)見(jiàn)表5-7。表5-7缺硼癥識(shí)別與防治要點(diǎn)發(fā)病部位癥狀最先出現(xiàn)在幼嫩組織;枝條,葉片和果實(shí)都可表現(xiàn)癥狀發(fā)病條件有機(jī)質(zhì)含量低,土壤偏鹽堿,沙壤...[繼續(xù)閱讀]

    1.發(fā)病癥狀如圖5-8-1～圖5-8-3所示。圖5-8-1缺磷初期癥狀圖5-8-2缺磷中期癥狀圖5-8-3缺磷中后期癥狀2.識(shí)別與防治要點(diǎn)見(jiàn)表5-8。表5-8缺磷癥識(shí)別與防治要點(diǎn)發(fā)病部位癥狀首先出現(xiàn)在較老葉片上發(fā)病條件有機(jī)質(zhì)含量低的貧瘠土壤、酸性土壤...[繼續(xù)閱讀]

    1.發(fā)病癥狀如圖5-9-1～圖5-9-4所示。圖5-9-1不同品種日灼果穗圖5-9-2高溫?zé)釟庾苽~片癥狀圖5-9-3果實(shí)高溫失水癥狀圖5-9-4日灼單果癥狀2.識(shí)別與防治要點(diǎn)見(jiàn)表5-9。表5-9氣灼病和日灼病識(shí)別與防治要點(diǎn)發(fā)病部位果實(shí)、葉片發(fā)病時(shí)期落花后...[繼續(xù)閱讀]

    1.發(fā)病癥狀如圖5-10-1、圖5-10-2所示。圖5-10-1水罐子病發(fā)病癥狀(初期)圖5-10-2水罐子病發(fā)病癥狀(中后期)2.識(shí)別與防治要點(diǎn)見(jiàn)表5-10。表5-10水罐子病識(shí)別與防治要點(diǎn)發(fā)病部位果實(shí)發(fā)病時(shí)期轉(zhuǎn)色期以后發(fā)病癥狀果梗上產(chǎn)生圓形或橢圓形褐色...[繼續(xù)閱讀]

    1.發(fā)病癥狀如圖5-11-1所示。圖5-11-1高溫干旱導(dǎo)致植株體內(nèi)缺肥缺水引發(fā)的葉片黃化現(xiàn)象2.識(shí)別與防治要點(diǎn)見(jiàn)表5-11。表5-11高溫干旱導(dǎo)致缺肥缺水引發(fā)黃化識(shí)別與防治要點(diǎn)發(fā)病部位葉片發(fā)病時(shí)期6～7月發(fā)病條件干旱缺水、缺肥引發(fā)的黃化...[繼續(xù)閱讀]

    1.發(fā)病癥狀如圖5-12-1所示。圖5-12-1遮陰型黃化癥狀2.識(shí)別與防治要點(diǎn)見(jiàn)表5-12。表5-12遮陰型黃化識(shí)別與防治要點(diǎn)發(fā)病部位葉片發(fā)病條件遮陰型黃化病多發(fā)生在新梢底層的第一片或第二片葉,由于葡萄在生長(zhǎng)中,頂端優(yōu)勢(shì)強(qiáng),新梢底層的第...[繼續(xù)閱讀]

    1.發(fā)病癥狀如圖5-13-1所示。圖5-13-1高溫高濕產(chǎn)生氣生根癥狀2.識(shí)別與防治要點(diǎn)見(jiàn)表5-13。表5-13高溫高濕產(chǎn)生氣生根的識(shí)別與防治要點(diǎn)發(fā)病部位葡萄老蔓基部節(jié)發(fā)病時(shí)期生長(zhǎng)后期發(fā)病癥狀高溫高濕下生長(zhǎng)迅速的葡萄節(jié)上易發(fā)生氣生根,髓...[繼續(xù)閱讀]

    1.發(fā)病癥狀如圖5-14-1所示。圖5-14-1不同品種裂果狀2.識(shí)別與防治要點(diǎn)見(jiàn)表5-14。表5-14生理性裂果識(shí)別與防治要點(diǎn)發(fā)病部位果實(shí)發(fā)病時(shí)期生長(zhǎng)后期發(fā)病癥狀果實(shí)裂果發(fā)病條件土壤板結(jié),排水差的黏質(zhì)土壤及易澇、易旱的土壤上,葡萄容易發(fā)...[繼續(xù)閱讀]

    1.發(fā)病癥狀如圖5-15-1所示。圖5-15-1生理性落花落果2.識(shí)別與防治要點(diǎn)見(jiàn)表5-15。表5-15生理性落花落果識(shí)別與防治要點(diǎn)發(fā)病部位果穗發(fā)病時(shí)期花前1周的花蕾和開(kāi)花后子房的脫落稱(chēng)為落花落果,落花落果率在80%以上者,稱(chēng)為落花落果病發(fā)病...[繼續(xù)閱讀]