利用Benzimidazoie藥劑防治洋菇腫柄病之研究

The Use of Benzimidazole Fungicides in Control of Mycogone Disease of Cultivated Mushroom

巴斯丁（Bavestin）及萬力（Benlate）二苯駢咪唑（Benzimidazol）類殺菌劑，室內藥劑試驗，0.25PPm濃度對洋菇腫柄病菌菌絲生長即具抑制力，5ppm濃度即可致死。此二藥劑亦阻害洋菇菌絲之生長，0.25ppm濃度其阻害率為1.8%，8Oppm濃度其阻害率為86%。光電比色法分析此二藥劑於菇體上之餘毒量，每坪覆土使用5克藥劑，第一採收期菇體餘毒量為5.55ppm，第三採收期餘毒量3.01ppm，第五採收期餘毒量3.85ppm。每坪覆土使用1克藥劑，第一採收期菇體餘毒量0.42PPm，第三採收期餘毒量0.075ppm，第五採收期餘毒量0.02ppm，藥劑處理覆土與採收期間隔愈久其菇體餘毒量愈低。濾紙盤法測定菇體餘毒量，本試驗施用於每坪覆土之藥劑量1〜5克，於洋菇採收期分析菇體餘毒量均低於5ppm。

Laboratory tests on the effect of Bavestin and benlate on the Mycogone perniciosa showed that 0.25ppm concentration of these two fungicides inhibited ) the growth of mycelia and a concentration of 5ppm was the lethal dosage. These two fungicides also inhibited the mycelial growth of the mushroom. The inhibition of the mycelial growth of the mushroom was increased as the concentration of the fungicide increase. The residues of these two fungicides in the fruiting-body of mushroom was determined by colorimetric method. When 5 g pet ping of these two fungicides were applied in casing soil, the residues of these two fungicides was 5.55ppm in the fruiting-body in first flush; 3.01 ppm in the third flush; and 3.85 ppm in 5th flash. When lg/ping of these two fungicides applied on casing soil, residues of these two fungicides was 0.42 ppm in 1st flush, 0.075 ppm in 3rd flush and 0.02 ppm in 5 th flush. The residues of the fungicides in the fruiting body of mushroom was also determined by the paper disc method. The results showed that the residues was below 5 ppm during all harvest period in all concentration of the two fungicides applied in casing soil.