Effect of Chemical Elements on the Growth of Crop Pathogens (II). Effect of Hg-, Ni-, Sn-, Pb-, Fe-, and Al-Salts on Rice Blast and Sheath Spot Fungi
Other Title
化學元素對作物病原菌之影響(第二報) Hg, Ni, Sn, Pb, Fe, Al 等元素對稻熱病及稻紋枯病菌發育之影響
Journal
農業研究
Journal Volume
13
Journal Issue
3
Start Page
38
End Page
43
Date Issued
1964-09-05
Date
1964-09-05
Author(s)
S.C. Hsu
T.C. Dough
徐水泉
杜自彊
Abstract
The effects of some inorganic saltes on the growth of rice blast and sheath spot fungi were investigated. Among the salts tested, HgCl2 shows the strongest fung-icidic effect. Nickel salts also has inhibitory effects on both fungi, but the effect decreases rapidly as the concentration is decreased.
Ferrous- and lead-salts at 10-3 mol concentration inhibit slightly the growth of rice blast fungus, while Al- and Sn—salts show little effect. Aluminum- and lead- salts seem to affect the density of mycelium of sheath spot fungus, but Fe-and Sn-salts show no effect.
In both [previous and [present experiments, chlorides are most effective for inhibiting the growth of both fungi.
Fungicidal effects of the salts so far tested on rice blast fungus decreases in the following order:
Cd>Hg>Co>Cu>Ni>Zn>Fe>Pb>Al>Sn>Mn
The order for sheath spot fungus is as Follows:
Cd>Hg>Co>Ni>Cu>Zn>Al>Pb>Fe>Sn>Mn
為明瞭各種化學元素對作物病原菌發育之影響如何，而舉辦本試驗。所得結果，希望可供為農藥資源開發及植病防治上之參考資料。
在本試驗之第一報，曾使用 Cd, Co, Cu, Zn，及Mn等五種重金屬元素為材料並已報告(1)，故本試驗仍依照第一報之設計及方法，繼續檢討 Hg, Ni, Sn, Pb, Fe，及AI等元素對稻熱病菌及稻紋枯病菌發育之影響。玆將所得之結果摘錄如下：
(l） 本試驗使用之六種元素中，氯化汞對稻熱病菌及稻紋枯病菌發育之抑制力最強。
(2) Ni化合物在10-3 Mol 濃度時，能抑制稻熱病菌及稻紋枯病菌之發育。
(3) Pb及Fe兩元素在10-3 Mol濃度時稻熱病菌菌絲之發育稍有影響，但AI及Sn在10-3濃度時仍無任何影響。
(4) AI及Pb在10-3 Mol濃度時對稻紋枯病菌菌絲發育密度有抑制現象。但Fe與Sn對菌絲密度之影響並不顯著。
(5）本試驗採用之三種鹽類中，以氯化物之抑制力最大。此與第一報之結果相同。
(6）本試驗使用之六種元素，對稻熱病菌之發育抑制力之順序是 Hg > Ni > Fe > Pb > AI > Sn，而對稻紋桔病菌之順序則是 Hg > Ni > AI > Pb > Fe > Sn ，兩者因病原菌之不同略有差異。
Publisher
農業試驗所
Type
journal article
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