Chapter 13 STEM BORERS Wu Junxiang Li Yiping Junxw@nwsuaf.edu.cn lyp2003@126.com
Wu Junxiang Junxiang Li Yiping Junxw@nwsuaf.edu.cn Junxw@nwsuaf.edu.cn lyp2003@126.com lyp2003@126.com Chapter 13 STEM BORERS
Chapter 13 STEM BORERS Lecture Outline >Corn borers Rice borers >Other stem borers >Monitoring and Management
Lecture Outline Lecture Outline ¾ Corn borers Corn borers ¾ Rice borers Rice borers ¾ Other stem borers Other stem borers ¾ Monitoring and Management Monitoring and Management Chapter 13 STEM BORERS Chapter 13 STEM BORERS
Corn Borers Chinese byname is玉米钻心虫or箭杆虫， belong to Lepidoptera,Pyralidae.2 species recorded in China: Asian corn borer Ostrinia furnacalis Europe corn borer O.nubilalis Asian corn borer is predominant in China
Chinese byname is 玉米钻心虫 or 箭杆虫, belong to Lepidoptera, Pyralidae. 2 species recorded in China: Asian corn borer Ostrinia furnacalis Europe corn borer O. nubilalis Asian corn borer is predominant in China. Corn Borers
图16玉米螟 1.址成虫，2.雄成虫13卵块，4，幼虫15，麵：6，幼虫为害玉米首嫩精心 叶秋，7幼虫为害果穗8幼虫为害玉米茎
成虫（左：，右：8） 卵块 一代幼虫 越冬代幼虫
1.Distribution Asian corn borer:Asia and Oceania; Nationwide distribution in China; Europe corn borer:Europe,Northwestern Africa,Western Asia and Northern America; Predominant species in Yili,Xinjiang; Occasionally found in Ningxia,Inner Mongolia and Hebei,but Asian corn borer is more predominant
Asian corn borer: Asia and Oceania; Nationwide distribution in China; Europe corn borer: Europe, Northwestern Africa, Western Asia and Northern America; Predominant species in Yili, Xinjiang; Occasionally found in Ningxia, Inner Mongolia and Hebei, but Asian corn borer is more predominant 1. Distribution 1. Distribution
2.Damage *Polyphagous pests, more than 200 host plants recorded. *Mainly cause damage t through boring plants as larvae.During seedling stage of corn or sorghum,bore leaves to produce“花叶”， During seedling stage of millet,bore young leaves to produce“枯心”.After rice shooting and heading stages,larval damage influences nutrient transportation in plants,causing plants to produce non-rich grains.Also,larval damaged plants are easily pushed down by strong winds
Polyphagous pests, more than 200 host plants recorded. Mainly cause damage through boring plants as larvae. During seedling stage of corn or sorghum, bore leaves to produce “花叶”. During seedling stage of millet, bore young leaves to produce “枯心”. After rice shooting and heading stages, larval damage influences nutrient transportation in plants, causing plants to produce non-rich grains. Also, larval damaged plants are easily pushed down by strong winds. 2. Damage 2. Damage
王米螟幼虫危害玉米穗
被害状（花叶，连珠孔） 幼虫为害玉米穗 谷子茎被害状
3.Life Cycle 1-6 generations/year in China.2-3 in Northeast and mid-downstream of Yellow River;3-4 in mid-downstream of Yangtsz River;5-6 in Huanan area. Overwinter as grown larvae in stems,ear centers and root stubbles of corns
1-6 generations/year in China. 2-3 in Northeast and mid-downstream of Yellow River; 3-4 in mid-downstream of Yangtsz River; 5-6 in Huanan area. Overwinter as grown larvae in stems, ear centers and root stubbles of corns. 3. Life Cycle 3. Life Cycle