几种杀菌剂对番茄灰霉病菌的毒力及田间防效

Toxicity and Field Control Efficiency of Several Fungicides Against Botrytis cinerea

以番茄灰霉病菌田间发病叶片为试材,采用菌丝生长速率法,研究了11种杀菌剂对番茄灰霉病菌的影响,选择其中较好的8种药剂进行田间药效试验。结果表明:室内毒力测定中25%咪酰胺EC对番茄灰霉病菌的毒力最强,其EC50值为0.0397μg/mL;40%嘧霉胺SC、40%百菌清SC和80%代森锰锌WP对番茄灰霉病菌也具有较好的抑制效果。田间试验结果中25%咪酰胺EC、28%烯肟·多菌灵WP、50%啶酰菌胺WG和50%异菌脲SC对番茄灰霉病表现较高的防效,防效分别为85.57%、82.68%、80.92%和73.34%。该试验筛选出了对番茄灰霉病具有较好防效的药剂,对番茄灰霉病的药剂防治具有重要的指导意义。

Taking disease leaves which infected by Botrytis cinerea in the field as materials,the toxicity of 11 fungicides against Botrytis cinerea were tested by mycelium growth rate method in laboratory,and 8 fungicides with better efficiency were selected to test in the field. The results showed that, in laboratory that 25% prochloraz EC had the best toxicity against Botrytis cinerea ,of which the EC^0value was 0. 0397 μg/mL. 40% pyrimethanil SC,40% chlorothatonil SC and 80% mancozeb WP also had better toxicity to Botrytis cinerea. The results of field trials showed that 25% prochloraz EC,28% ene oxime carbendazim WP, 50% boscalid WG and 50% iprodione SC had high control effect, which were 85. 57% ,82. 68%, 80. 92% and 73. 34%, respectively. The effective fungicides were screened out, which provided an important directive to control the disease.