两种益微菌对枯萎病菌抑制能力的离体和活体测定

CAPACITY OF TWO BENIFICIAL MICROORGANISM INHIBITING FUSARIUM OXYSPORUM F. SP. VASINFECTUM IN VIVO AND VITRO

本文采用平板测定与生测法相结合，针对棉花枯萎病菌，将益微菌ＡＢ３０４－２、ＡＢ２７２与病原菌导入植物体中，测定益微菌的抑制能力。结果表明，在平板培养基中，对枯萎病菌具有较强抑菌能力，被抑制枯萎病菌的分生孢子数减少；在植物体中，两种益微菌对棉花枯萎病菌具有较强抗扩展能力；在盆钵试验中，两种益微菌的初步防效为９１．４９％和８８．６１％。

Inhibitory activity of 2 benificial microorganism, AB3042 and AB272, to Fusarium oxysporum f.sp.vasinfectum, were assessed in petri dish and on plant. They showed strong antagonistic activity in petri dish, and the antifungal mechanism was mainly deformation of hyphae and reduction of conidia, and strong antiexpansion activity on plant, to F.oxysporum f.sp.vansinfectum. In pot experiment, they gave 91.49% and 88.61% control.