A.營(yíng)養(yǎng)生長(zhǎng)B.生殖生長(zhǎng)C.過(guò)渡時(shí)期D.結(jié)果期
A.減少病蟲(chóng)來(lái)源B.選用抗病抗蟲(chóng)品種C.切斷病蟲(chóng)傳播途徑D.預(yù)防為主綜合防治
A.劈接B.切接C.嵌芽接D.插皮接