敌委丹种子处理对小麦幼苗生长及茎基腐病的防治效果

Seeding Growth and Control Effect of Difenoconazole Seed Treatment on Wheat Crown Rot

通过室内试验,研究了敌委丹对小麦种子萌发、促生防病效果。结果表明,敌委丹在合适的浓度下拌种,有促进种子萌发和提高种子活力的效果。当药剂用量为3 mL/kg时,小麦发芽势、发芽指数和活力指数分别为94.72%、34.12和1.46。敌委丹拌种对小麦幼苗有促进生长的效果,当药剂用量为3 mL/kg时,小麦幼苗最大根长和地下部分鲜重分别为20.6 cm和2.21 g/10株,株高和地上部分鲜重分别为22.5 cm和4.83 g/10株。敌委丹拌种对小麦茎基腐病具有良好的防治效果,拌种后小麦茎基腐病的病情指数与对照相比显著降低,药剂用量为5 mL/kg时,发病率仅为9.33%,病情指数为6.58,防效高达90.93%。

The effect of difenoconazole on wheat seed germination and seedling growth for controlling disease was studied through laboratory test.The results showed that difenoconazole could promote seed germination and improve seed vigor under the appropriate concentration.When the dosage of reagents for 3 mL/kg,wheat germination potential,germination index and vigor index were 94.72%,34.12 and 1.46,respectively.Seed coating by difenoconazole had promoted seedling growth effect,which wheat seedling the largest root length and underground part fresh weight were 20.6 cm and 2.21 g/10 strains,and which plant height and fresh weight above ground were 22.5 cm and 4.83 g/10 strains when the dosage of reagents for 3 mL/kg.Seed coating by difenoconazole had good control effect to wheat crown rot,which the disease index reduced significantly compared to contrast.The incidence,disease index and control effect were only 9.33%,6.58 and 90.93%when the dosage of reagents for 5 mL/kg.