一、第一代水稻螟虫的测报方法:1.以二化螟发生为主的地区(多为单双混栽稻区)以二化螟的数量占优势,幼虫初期集中危害早稻本田(分蘖期)植株的叶鞘(又称苞叶),造成“枯鞘”(又称黄苞叶),进而分散蛀入植株心叶危害,咬坏生长点,形成“枯心苗”。因此,以防治枯鞘内的初龄幼虫为主。 First, the first generation of rice stem borers reporting method: 1. The occurrence of Chilo suppressalis dominated areas (mostly single and double mixed rice area) to the number of Chilo suppressalis dominant, early larvae focus on early rice Honda (tillering stage ) Plant leaf sheath (also known as husk), resulting in “dry sheath ” (also known as yellow bract leaves), and then scattered into the plant heart leaf damage, bite the growth point, the formation of Therefore, to prevent the first instar larvae within the dead sheath.