Studies on the fungicidal action and its physico-chemical properties of phenylmercuric 8-oxyquinolinate

Phenylmercuric 8-oxyquinolinate의 살균작용 및 이의 이화학적 성질에 관한 연구

In order to investigate the fungicidal activities against various plant pathogenes, diminishing effect of plant transpiration, phytotoxicities, vapor effect and the rate of reduction by ultraviolet rays of phenylmercuric 8-oxyquinolinate(P.M.Q), this experiments were undertaken under various laboratory conditions. 1. Inhibitory activity on the spore germination of this chemical was shown less effective than that of P.M.A..(Table 2, Table 3, Table 4, Table 5 and Table 6) Also, P.M.Q. was resulted a somewhat higher inhibitory activity on the hyphae growth than P.M.A. (Table 7). 2. In the diminishing effect of plant transpiration, 8-hydroxyquinoline sulfate(oxine sulfate) was more strong inhibitory at first than P.M.Q., while, at last, P.M.Q. was more strong inhibitory in comparison with oxine sulfate(Table 8, Fig. 1 and Table 9). 3. P.M.Q. was shown less injury on the germination of rice plant seeds and the emergence of their roots than P.M. A.(Table 10). Injuries was not observed on the rice seedlings and soy-bean seedlings sprayed with 40 ppm of this chemical. 4. P.M.A. had more inhibitory effects on the mycelial growth of phytopathogenes than P.M.Q. on the vapor effect (Table 11, Fig. 2). 5. Biological activity and chemical decomposition rate of P.M.A. were greatly reduced by exposure of this compound to ultraviolet rays. But, P.M.Q. was only slightly affected by similar treatment(Table 12, Fig. 3, Table 13 and Fig. 4). From the above results, this chemical will be a promising fungicide adding fungitoxicities against various phytopatho genes, diminishing effect of plant transpiration and physico-stability.

Phenylmercuric 8-Oxyquinolinate의 광범위한 식물병원균에 대한 살균작용, 식물의 수분증산억제작용, 식물에 대한 약해작용, Gas작용 및 자외선에 의한 경시변화에 관해 실험을 행하였으며, 그 결과를 요약하면 다음과 같다. (1) 포자발아억제작용은 P.M.A.보다 약간 불량한 결과를 보이며, 균사생장억제작용은 P.M.A. 보다도 양호하였다. (2) 식물의 수분증산억제작용은 초기에는 8-Hydroxyquinoline sulfate가 P.M.Q.보다도 강한 억제작용을 나타내었으나, 끝에 가서는 반대로 P.M.Q가 Oxine sulfate보다도 강한 작용을 나타냈다. (3) 수도종자의 발아, 발근에 미치는 영향은 P.M.A. 보다 약해가 적었고 수도 및 대두의 유식물의 경엽(40ppm 처리)에도 약해가 없었다. (4) 식불병원균에 대한 Gas효과에 의한 살균력은 P.M.A.보다 적었다. (5) 자외선에 의한 영향은 생물학적인 변화와 화학적인 변화가 거의 일치하였으며 P.M.Q.는 P.M.A.보다도 훨씬 자외선에 안정하였다. 이상의 결과로 보아 본약제는 광범위한 식물병원균에 대해 살균작용을 가지고 있고 식물의 수분증산도 억제시키며 이화학적인 안정성을 가진 유망한 살균제가 될 것으로 생각된다.