STEM RICE BLIGHT AND SECRETS FOR ITS PREVENTION
Abstract
The occurrence of rice blight, as has been known since ancient times, varies with the weather (atmospheric temperature, sunshine, and rainfall), variety of rice, cultivation and control methods. The foremost condition for the frequent occurrence of stem rice blight is at the time when the susceptibility of the stem to rice blight is high. The points of invasion of stem blight bacteria that cause stem rice blight are stem joints, interlodes, and husks. It appears that when these sections have nitrogen the invasion of bacteria is easy and of long duration. This sort of condition is brought about when large quantities of nitrogen fertilizer are used and the effects of nitrogen is delayed due to the low temperature during summer, or when sunshine is inadequate because of rain after the ear-appearance period. In the case of early cultivation, stem rice blight tends to occur at the times of somewhat low temperature, while in the case of late cultivation at the time of somewhat high temperatures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 02, 1966
- Accession Number
- AD0833633
Entities
People
- Ono Kosaburo
Organizations
- United States Army Biological Warfare Laboratories