摘要:
盆栽和田间接种测定结果表明,芦笋芽出土后1～5d为最易受病菌侵染期,随着生长日数递增,植株抗侵染力增强,指数回归方程:Y=80.148×0.957X,r=-0.8489,呈明显负相关。甲基托布津对茎枯病菌毒性测定结果,每升含有效成份1.4g,器孢子均丧失发芽力,直线回归方程Y=-9.7137+2.6931X,r=0.9749.器孢子在1.4～0.47g/l浓度的平板培养基上培养3d,抑菌圈直径为7.3～6.3mm;菌丝体在1.4～0.23g/l浓度的培养基上培养7d,菌丝体均无生长,对照组生长直径为56mm。
Abstract:
The sensitivity of Phoma asparagi Sacc.infecting in asparagus to the fungicide,thiophanate methy1,was tested.The results showed that the sensitive period of asparagus infected by P.asparagi was in 1～5 days after germinating.The resistant ability of the plant to P.asparagi was higher and higher as the asparagus was growing up,of which the exponential regression formula was Y=80.148×0.957X,r=0.8489.The flatted test showed that the pycnidiospores could not germinate in thiophanate methy1 with the concentration of 1.4g/l,of which to germinating rate the regression was Y=-9.7137+2.6931X,r=0.9749.The girdle width of P.asparagi was 7.3～6.3mm,when it grew in the medium with 1.4～0.23 g/l thiophanate methy1 for 3 days,on which the mycelium cultured for 7 days didn’t grow.
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