山东水稻稻纵卷叶螟一般发生3～4代,而为害最重的是2代(全国3代),今年2代稻纵卷叶螟显著多于往年,须重点防治。一、农业防治1.选用抗(耐)虫的良种。在高产、优质的前提下,应选择叶片厚硬、主脉紧实的品种类型,使低龄幼虫卷叶困难,成活率低,达到减轻为害的目的。 Shandong rice leafroller generally occurs 3 to 4 generations, while the damage is the second generation (nationwide 3 generations), the second generation of rice leafroller this year significantly more than in previous years, should focus on prevention and treatment. First, the prevention and treatment of agriculture 1. Selection of resistant (resistant) insects of the species. Under the premise of high yield and good quality, the varieties with thick and firm leaves and tight main veins should be selected so that young larvae are difficult to roll leaves and have low survival rate to reduce the damage.