Producting condition of the toxic components from Myrothecium roridum and it's toxicity to various plants

Abstract

The toxic components producted by Myrothecium roridum showed different intensity of toxicity against various plants including Slidago altissima L., Artemisia princeps Pamp., Rumex crispus L. and Setaria viridis (L.) P. etc. Trifolium repens L., Cayytatia japonica (Thunb.) Gagn. and Oenothera odorata Cav. are very sensitive against the toxic components and Plantago asiatica L., Houttuynia cordata Thunb., Miscanthus sinensis Anders and Pheiob-lastus • numilis (Mitford) Nakai are non-sensitive. The results suggest that the toxic components have selective toxicity to various plants. Optium medium and temperature for production of the toxic components is potato sucrose agar medium and 25-30°C. The components are extracted easily with water and sterilized at 80 °C for 3 minutes. The toxicity of the components against plants depends on concentration of the solution and addition of spreader. These results support that the components apply for the herbicide. © 1998, The Japanese Society of Sericultural Science. All rights reserved.