油桃大面积出现畸形果是什么原因?

2025-03-14 14:26:56
推荐回答(1个)
回答(1):

油桃畸形是因为微型螨类对幼果的伤害,缺磷,硼素失调所致。
  1、桃瘿螨畸果病:是桃树上发现的1种新病害。因果面凹凸不平,群众称疙瘩桃。 病原为下心瘿螨,属微型螨类。落花后,幼小果实开始受害,果面出现不规则的暗绿色斑块。随着桃果膨大,病部桃毛逐渐变褐、倒伏、脱落,病部生长受阻而呈现深绿色凹陷状。后期,病果呈凹凸不平、着色不均匀的“猴头”状,病部果肉为深绿色。果实膨大期受害,果面发生纵横裂口,有的裂口长而深。严重受害果,果肉木质化,不堪食用。感病桃树,部分叶芽坏死,开花后期常呈现有花无叶的“干枝梅”状。
   2、油桃硼素失调:桃树缺硼可使新梢在生长过程中发生“顶枯”,也就是新梢从上往下枯死。在枯死部位的下方,会长出侧梢,使大枝呈现丛枝反应。在果实上表现为发病初期,果皮细胞增厚,木栓化,果面凹凸不平,以后果肉细胞变褐木栓化,成为畸形的“疙瘩果”。
  3、油桃缺磷: 幼圳及附近未成熟叶呈暗绿色,成熟叶呈青铜色或暗红色,老叶的叶脉间出现淡绿色的斑纹,茎及叶柄带紫色,新梢变细,叶片呈舌状,果实畸形。

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