双效灵是一种新型的氨基酸类杀菌剂,室内毒力测定结果表明,它对西瓜枯萎病菌无明显的抑制菌丝生长作用,但对其小孢子具有一定的抑制能力,EC_(50)为75.3ppm。用它浸种后对西瓜幼苗具有明显的促进生长作用,幼苗主根长度增加,侧根数增多,幼苗平均株高显著高于对照,植株体内过氧化物酶活性也提高。 As a new type of amino acid fungicide, the dual toxicity test showed that it has no obvious inhibitory effect on mycelial growth of Fusarium oxysporum f. 75.3 ppm. After it was soaked, it could promote the growth of watermelon seedlings. The length of main roots increased and the number of lateral roots increased. The average seedling height of seedlings was significantly higher than that of the control, and the peroxidase activity in the plants also increased.