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Solutions for the control of the sugar beet cyst nematode Heterodera schachtii - experiences with nematode resistant sugar beets in the Rhineland.

机译:控制甜菜囊肿线虫Heterodera schachtii的解决方案-莱茵兰抗线虫甜菜的经验。

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In 1998 the first nematode resistant sugar beet variety was registered in Germany. Since then another means for biological control of nematodes is available besides the cultivation of resistant catch crops. In the present field trials the new variety reduced nematodes by up to 80%. It was not resistant to rhizomania. Because of the lower yield when attack is absent, the susceptibility to leaf diseases, and the difficulties with beet harvesters the variety should only be cultivated above a thresholdof 800-1000 eggs/larvae per 100 ml soil. Additionally there should be a change in the crop rotation between resistant and susceptible varieties in combination with resistant catch crops to avoid the development of resistance breaking pathotypes.
机译:1998年,第一个抗线虫抗性甜菜品种在德国注册。从那以后,除了种植抗病性农作物以外,还有另一种用于防治线虫的生物方法。在目前的田间试验中,新品种将线虫减少了多达80%。它对根瘤菌没有抵抗力。由于在缺乏攻击时产量较低,对叶片疾病的易感性以及甜菜收割机的困难,因此,每100 ml土壤中应仅在800-1000个卵/幼虫的阈值以上种植该品种。另外,在抗病品种和易感品种与抗病性农作物结合起来的作物轮作中应有所变化,以避免发生抗性破坏病原体。

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