The paddy borer is the chief pest of rice in China, causing an annual loss not less than 10% in average years before liberation.
稻螟是我国长期以来的一种严重害虫，解放前因螟害常年损失稻谷10%以上。
Moreover, it is important also to improve cultural practices, regulate the growth stage of rice and deteriorate the living conditions of the paddy borer in order to avoid or reduce borer injury.
另一方面力求改进栽培技术、调节水稻生育期，恶化螟虫的生活条件，避免或减轻螟害。
The damage process of paddy stem borer to rice plant can be regarded as a single input-single output system.
三化螟为害水稻的过程可以看作一个单输入——单输出系统。
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