总结了物理机械防治技术，进行了内吸药剂打孔注射法和树冠喷雾防治试验。
Summarized the physical machinery preventing and controlling technology by carrying on the experiments of medicament drilling to a hole and crown atomization.
总结了物理机械防治技术，进行了内吸药剂打孔注射法和树冠喷雾防治试验。
Summarized the physical machinery preventing and controlling technology by carrying on the experiments of medicament drilling to a hole and crown atomization.
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