economic thresholds meaning in Chinese

经济阈值

Economic threshold for the control of apple fruit borer
桃小食心虫的防治标准
Economic threshold of the rice stem borer
水稻二化螟防治标准
The experiment was conducted to estimate the economic injury level ( eil ) and economic threshold ( et ) of b . tabaci
摘要研究了烟粉虱在黄瓜上的经济损害水平和经济阈值。
Preliminary study on occurring regulation of henosepilachna vigintioctomaculata in yulin area and its economic thresholds
榆林地区马铃薯二十八星瓢虫发生规律及防治指标初步研究
Relationship between the population density of schizotetranychus nanjingensis with the bamboo output and the determination of economic threshold
南京裂爪螨种群密度与新竹产量的关系及经济阈值的研究

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