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甜瓜列当为寄生性杂草,也叫瓜列当、埃及列当,在新疆以东疆、南疆、伊犁地区发生较为严重,寄生率一般为30%～40%,严重时达到100%。瓜列当根形成吸器侵入寄主根内,吸取寄主作物体内养分和水分,阻断寄主作物生长,使产量降低。甜瓜常因列当导致植株萎蔫,含糖量下降,产量、品质危害极大。一、危害症状瓜列当属于根寄生,按寄生程度分属于全寄生。列当对作物危害,主要表现为吸收寄主水分和养分,
Melon column as parasitic weeds, also known as melon, Egypt, Egypt, when in Xinjiang, east Xinjiang, southern Xinjiang, Ili region more serious, the parasitic rate is generally 30% to 40%, in severe cases reached 100%. Meloid was formed when the inhaler inhalation host root, draw the host plant nutrients and water, blocking the growth of host crops, so that the yield decreased. Melon often lead to plant wilting due to column, sugar content decreased, yield, quality great harm. First, the harmful effects Melon belongs to the root parasitism, according to the degree of parasitism belongs to the entire parasitic. Column when the crop damage, mainly for the absorption of host water and nutrients,