Cucumber mosaic virus (CMV) and lily symptomless virus (LSV) were readily detected from bulb scales of infected Maximowicz's lily (Lilium leichtlinii var. maximowiczii Baker) plants by enzyme-linked immunosorbent assay (ELISA). However, tulip breaking virus (TBV) was not efficiently detected from them by ELISA. The concentration of CMV and LSV appeared to be higher in the outer and inner bulb scales than in the middle ones. To detect both viruses reliably in Maximowicz's lily bulbs, it was necessary to homogenize two or more outer and/or inner bulb scales and to test the extracts by ELISA.
南西諸島の土壌に生息するPythium菌を,キュウリ種子などによる捕捉法と直接接種法を用いて分離し,種と分布を調査した。供試した21ヵ所の土壌から計207菌株,1試料当たり1∼6種のPythium菌を分離し,H-Zs(糸状胞子嚢から遊走子を形成するが,生殖器官は未形成の一群)を含む14種に分類・同定した。最も多く分離されたのは,P. aphanidermatum,次いでP. sylvaticum, P. vexans, P. delienseなどであった。
Two compounds which were identified as fervenulin and toxoflavin were isolated as toxins produced by Pseudomonas glumae, the causal agent of bacterial grain rot of rice. These toxins produced a chlorotic spot on leaves of rice seedlings at a concentration of about 10μg/ml or more. It was also observed that the growth of leaves and roots of rice seedlings was reduced when they were treated with these toxins.