西樂生石灰(Ceresan Lime)防治稻熱病之效果(預報)
Other Title
Effect of Ceresan-Lime on the Control of Rice Blast Disease
Journal
農業研究
Journal Volume
6
Journal Issue
3
Start Page
41
End Page
46
Date Issued
1956-10-04
Date
1956-10-04
Author(s)
簡錦忠
C.C. Chien
Abstract
1. Ceresan石灰防治稻熱病之效果，較石灰波爾多液為佳，但距病原接種日期越久，效力越低。先撒佈藥劑而後酒水，共保護作用可達3天，石灰波爾多液則不及之。
2. 穗稻熱病之防治，兩種藥劑撒佈3次者共效果較2次者為高。
3. 撒佈Ceresan石灰者與對照區比較，其產量可減少20~40%之損失，石灰波爾多液為10~25%。
4. 當出穗前後撒佈Ceresan石灰，與對照區比較，對穗稽熱病之被害率可減少45~70%，石灰波爾多液者約20~65%。僅于出穗後撒佈一次者，其效果則不及前者。
5. 節稻熱病之防除，當出穗前後撒佈者較為有效。
6. 無論出穗前抑後僅撒佈Ceresan石灰一次者，與對照區比較，其產量均可減少10～13%之損失，石灰波爾多液則不及之。
This paper deals with the comparative studies on the effectiveness of Ceresan-lime (0.6% Ethyl Mercury Chloride, Hg. 0.25%) and Bordeaux mixture of 4-8 formula (4 g. of Copper sulphate, 8 g. of stone lime, and 1,000 cc of water) for the control of rice blast. According to laboratory and field trials which showed that Ceresan-lime dusting (30 kg per ha.) is more effective for controlling the disease than Bordeaux mixture (4000-5000 litre per ha.) spraying.
Leaf blast could be well controlled by three applications of Ceresan-lime before heading stage of rice. For the purpose of protecting the neck of ears and the node of culms become infested with the disease, then dusting should be held before and after heading stage.
Publisher
農業試驗所
Type
journal article
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