水稻三代三化螟严重发生情况下的"两查两定”及防治技术的探讨
수도삼대삼화명엄중발생정황하적"량사량정”급방치기술적탐토
Discussion on the implementation of the Program of “Observe Twice and Determine Twice” in case of the serious occurrence of the Third Generation of Tryporyza incertulas and the Control
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