The paddyborer 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。
2
Moreover, it is important also to improve cultural practices, regulate the growth stage of rice and deteriorate the living conditions of the paddyborer 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。
3
The damage process of paddy stem borer to rice plant can be regarded as a single input-single output system.