经济阈值 meaning in English

economic thresholds
economicthreshold

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。
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
When the cucumber plant grew into the 4 - leaf stage , the eil of b . tabaci was 9 . 3159 % ; the et of b . tabaci was about 18 . 4474 adults / plant , or 4 . 6119 adults / leaf
黄瓜幼苗4叶期时，烟粉虱的经济损害水平为9 . 3159 % ；烟粉虱的经济阈值为每株黄瓜有烟粉虱成虫18 . 4474头，即平均每片黄瓜叶有成虫4 . 6119头。
Via investigation and analysis , it discussed relation between occurrence of wheat yellow dwarf and yield . morbidity and grades standard was determined as well as wheat dwarf economic threshold
摘要通过系统调查与分析，探索了小麦黄矮病的发生程度与产量的关系，确定了其发病程度与分级标准，研究出了小麦黄矮病的经济阈值。