1) Research of Trees' Resistance Against Longicorn
树种对天牛的抗性
2) resisiting tree species
抗性树种
3) cold-resistant tree species
抗寒性树种
4) Poplar longicorn
杨树天牛
1.
Species and Control Methods of Poplar Longicorn in Huaibei;
淮北地区杨树天牛种类及防治方法
2.
A data base management system for poplar longicorn was set up.
建立了杨树天牛数据库管理系统，数据分为标准地数据和虫情普查数据，后者根据范围又分为县、乡、村级数据。
3.
Within the outbreak region of poplar longicorn the occurring number of poplar longicorn in different stands with different structure, composition and climate factors were approached by the theory of quantification.
运用数量化理论对杨树天牛发生区内不同林分结构、树种组成和气候因素下的发生量预测，表明林分结构。
5) resistance species of poplar
杨树抗性品种
补充资料：树种
1.树木的种类。如针叶种﹑阔叶种等。 2.树木的种子。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条