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Crop rotations with Mi gene resistant and susceptible tomato cultivars for management of root-knot nematodes in plastic houses

机译:具有Mi基因抗性和易感番茄品种的轮作,用于管理塑料房屋的根结线虫

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Four crop rotations including the Mi resistant tomato cv. Monika (R) and the susceptible cv. Durinta (S), were assessed for three consecutive cropping seasons in three unheated plastic houses located in north-eastern (Barcelona), east (Eivissa) and south-western (Cadiz) Spain. Tomatoes were cultivated from March to July 2005 (1), 2006 (2) and 2007 (3) at Barcelona and Eivissa, and from March to July 2006 (1), September 2006 to February 2007 (2) and March to July 2007 (3) at Cadiz. The crop sequences in the rotation were R"1R"2S"3, R"1S"2S"3 S"1R"2S"3 and S"1S"2S"3. Nematode population densities in soil and roots, reproduction indices, and tomato yield were compared for each cropping cycle and rotation. Average pre-plant nematode densities (Pi) at the beginning of the study were 247, 7, and 172 juveniles per 250cm^3 of soil at Barcelona, Eivissa and Cadiz, respectively. The Mi resistant tomato cv. Monika suppressed M. javanica at Barcelona and Eivissa, and M. arenaria and M. incognita at Cadiz, and prevented nematode population increases by more than 90% compared with the susceptible cv. Durinta. At Barcelona, the 3-year average tomato yield increased by 2.6kg m^-^2 in the rotations including at least one resistant tomato crop, and by 6.1kg m^-^2 when the resistant cultivar was cropped for two consecutive years. However, no differences in yield were found at Eivissa due to low Pi, nor at Cadiz where the resistant cultivar was poorly adapted to the agroclimatic conditions of the area.
机译:四个轮作,包括抗Mi番茄。 Monika(R)和易感简历。在西班牙东北(巴塞罗那),东部(艾维萨)和西南(加的斯)的三个未加热的塑料房中,对Durinta(S)进行了连续三个种植季节的评估。从2005年3月至2005年7月(1),2006(2)和2007(3)在巴塞罗那和Eivissa以及从2006年3月至7月(1),2006年9月至2007年2月(2)和3月至2007年7月( 3)在加的斯。轮作中的作物顺序为R“ 1R” 2S“ 3,R” 1S“ 2S” 3 S“ 1R” 2S“ 3和S” 1S“ 2S” 3。比较了每个种植周期和轮作的土壤和根系中的线虫种群密度,繁殖指数和番茄产量。在研究开始时,巴塞罗那,Eivissa和加的斯的每250cm ^ 3土壤平均线前密度(Pi)分别为247、7和172个幼虫。耐Mi番茄简历。莫妮卡(Monika)在巴塞罗那和依维萨(Eivissa)压制了爪哇分枝杆菌(M. javanica),在加的斯(Cadiz)压制了粉刺分枝杆菌(M. arenaria)和隐身分枝杆菌(M. incognita),与易感性简历相比,线虫种群增加了90%以上。杜林塔。在巴塞罗那,轮作(包括至少一种抗性番茄作物)的3年平均番茄产量提高了2.6kg m ^-^ 2,而当连续两年种植抗性品种时,其三年平均番茄产量提高了6.1kg m ^-^ 2。然而,由于磷含量低,在艾维萨(Eivissa)或在加的斯(Cadiz)均未发现产量差异,因为抗病品种对该地区的农业气候条件适应性很差。

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