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为探讨无机盐和有机盐对南方根结线虫的作用方式,在室内利用沙柱法和染色法测定了二者对南方根结线虫2龄幼虫迁移能力及侵入番茄根部能力的影响。结果表明,随着各盐处理浓度的增加,南方根结线虫2龄幼虫的迁移能力和侵入能力显著降低。在4μg/m L KSCN、C6H8O7、KCl、KH2PO4、KHCO3和Mn SO4·H2O沙柱中,15 d后2龄幼虫的平均迁移距离最小,分别为0、0.33、0.52、0.53、0.55和0.58 cm,而对照为0.94 cm。2龄幼虫在Ba NO3、K2HPO4、KHCO3、Cs Cl和KSCN各浓度沙柱中的平均迁移距离均小于0.94 cm。2μg/m L NH4NO3、KH2PO4、(NH4)2CO3、Cs Cl、(NH4)2SO4、Na SCN和NH4SCN处理15 d后,2龄幼虫对番茄根部的侵入率最低,分别为1%、2.33%、1.33%、2%、2%、1%和1.67%。表明对2龄幼虫侵入番茄根部抑制效果最明显的盐为NH4NO3、KH2PO4、(NH4)2CO3、Cs Cl、(NH4)2SO4、Na SCN和NH4SCN。
In order to investigate the mode of action of inorganic salts and organic salts on Meloidogyne incognita, the effects of both on the migratory ability of second instar larvae of Meloidogyne incognita and their ability to invade tomato roots were determined by sand column method and staining method indoors. The results showed that with the increase of salt concentration, the 2nd instar larvae of M. incognita were significantly reduced in migration and invasiveness. The average migration distance of 2nd instar larvae after 4 d was 0, 0.33, 0.52, 0.53, 0.55 and 0.58 cm respectively in 4μg / mL KCSN, C6H8O7, KCl, KH2PO4, KHCO3 and MnSO4 · H2O sand columns. While the control was 0.94 cm. The average migratory distances of 2nd instar larvae in sandstone columns of Ba NO3, K2HPO4, KHCO3, CsCl and KSCN were all less than 0.94 cm. The second instar larvae had the lowest invasion rates of tomato roots after treated with 2μg / m L NH4NO3, KH2PO4, (NH4) 2CO3, CsCl, (NH4) 2SO4, Na SCN and NH4SCN for 1 and 2.33%, 1.33 %, 2%, 2%, 1% and 1.67%. The results showed that the inhibitory effect of 2nd instar larvae on tomato root was NH4NO3, KH2PO4, (NH4) 2CO3, CsCl, (NH4) 2SO4, Na SCN and NH4SCN.