yield loss

The apparent infection rate equations in different disease development stages for RSB, and the model of yield loss assessment were set up.

不同品种受纹枯病为害所致损失不同，组建了不同品种的产量损失估计模型，施氮量对同等病情程度的损失影响不显著。

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The decrease of number of available tillers was the main factor in the components of yield loss.

在产量损失构成中，有效分蘖数的减少为主要因素。

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The results show that no significant effect was discovered on the yield loss for the second generation black-striped leaf bug, the economic injury levels were calculated to be 27 and 37 bugs per 100 plants for the third and the fourth generation.

四代中黑盲蝽的危害损失随虫口密度的增加而增加。④三、四代中黑盲蝽的经济损害允许水平分别为百株虫量27头和37头。

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The yield loss caused by the disease was 20%~ 50% in irrigated field, and 10%~ 25% in nonirrigated farmland.

该病造成的产量损失，在水田一般为20%～50%，旱地一般为10%～25%。

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Investigations revealed that sooty moulds caused various damage to tropical fruit crops on Hainan Island, 9.8 Per cent yield loss was resulted from extremely severe disease.

在海南等地的调查、测定结果表明，煤烟病对热带果树有一定为害性。在特别重病的情况下，芒果产量损失9.8%；

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Studies on yield loss cause with cotton verticillium wilt in field

棉花黄萎病田间为害损失研究

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The result showed that the main damage influence of diseases and worm was thick of ear, grains of row and the weight of one hundred grains, the grade of disease and the amount of worm had significant positive correlation to yield loss;

研究表明，病虫为害主要影响穗粗、行粒数和百粒重产量构成因素，病级和虫量与产量损失呈显著正相关；

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Wheat yield loss in relation to density of armyworm ( mythimna seperata) larvae and wheat development stage

粘虫（Mythimna seperata）为害小麦的产量损失和幼虫密度及生育期的关系

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The results showed that flase smut affected the seed setting percentage of rice decreased most significantly, which was the major cause for the yield loss.

结果表明，稻曲病对水稻结实率下降的影响最大，这是引起产量损失的主要原因；

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Then at the 6 point will lead to a higher pregnancy rate. The Grains and grain weight decreased and the blasted rate and yield loss rate of rice increased with the increase of disease grains each ear.

水稻稻曲病随着每穗稻曲球数增加，穗粒数、粒重及千粒重下降，秕谷率上升，产量损失率增加。

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Due to extent areas in medium-large basins, their erosion, transport, sediment process crisscrossed, and natural processes in basin rounded soil and water loss system became complicated, time and spatial variability of sediment yield factors enhancing.

中大流域由于流域面积很大，使得流域的侵蚀、输移、沉积过程交错，流域的这一完整的水土流失体系的自然过程复杂化，侵蚀产沙因子时间和空间的变异性很大。

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The major problem in Cu CMP is dishing, serious dishing will cause the yield loss.

铜化学机械抛光是近些年发展最快的一种工艺,铜碟形是铜化学机械抛光工艺中的主要问题之一.

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Studies on Yield Loss and Control Index of Rice Kernel Smut

水稻稻粒黑粉病为害损失测定及防治指标的研究

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Current yield increased or decreased to take account of the capital gain or loss on redemption.

赎回证券时,将当前收益率的涨跌情况纳入资本利得或损失的计算内.

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Study of garlic leaf blotch ( cladosporium allii) ⅳ. yield loss assessment and fungicide control experiments

大蒜叶斑病（Cladosporium allii）的研究Ⅳ.产量损失估计及药剂防治试验

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Water stress in shooting and bearing period had the largest yield loss, following with the tillering stage and heading stage.

拔节孕穗期遭受水分胁迫在单阶段胁迫中减产幅度最大，分蘖期、抽穗开花期紧随其后，分蘖、拔节孕穗期连续中度胁迫减产幅度超过任一时期。

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In order to examine the effect of alternative tillage practices on crop yield, water conservation and soil loss, a field study was conducted over a period of 6 years.

在模拟降雨和自然降雨条件下研究长期（6年）定位耕作措施对豫西旱区坡耕地水分保持、土壤流失以及冬小麦产量的影响。

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Studies on Yield Loss and Dynamic Economic Threshold of Cowpea Aphid Aphis craccivora Koch on Cowpea, Vigna sp .

豆蚜危害豇豆损失率及动态经济阈值研究。

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Sclerotinia sclerotiorum, one of the most destructive plant pathogenic fungi, causes white mould disease, resulting in huge yield loss every year, and thus is a serious problem requiring to be solved urgently in agricultural production.

核盘菌（Sclerotinia Sclerotiorum）是一种破坏力极强的致病真菌，引起菌核病，导致严重的经济损失，是农业生产上迫切需要解决的重要问题。

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Study on forecast for epidemical tendency and yield loss of SOYBEAN FROGEYE LEAF SPOT

大豆灰斑病流行趋势预测及产量损失研究

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Whereas, the faint negative effectiveness to yield loss was from the stem diameter, ratios of effective plants and fresh bast fibre.

百蔸虫量主要通过株高及鲜皮厚间接影响产量，而通过茎粗、有效株及出麻率对产量损失率有微弱的负效应。

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Stem rot disease ( Sclerotinia sclerotiorum) is a major disease of oilseed rape, which caused by Sclerotinia sclerotiorum usually resulting in 5% of seed yield loss in general year and 30% or even more loss in the year with crop being seriously infected.

菌核病是油菜的重要病害，它是由核盘菌（Sclerotinia Sclerotiorum）侵染植株引起的茎、枝腐烂，导致油菜产量损失。一般年份可致减产5%左右，发病严重年份可导致油菜减产30%或更多。

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, and YS ( yield strength) and the value of YS/ UTS increase through the followed artificial ageing with obvious loss of elongation.

而其后的人工时效处理能明显提高合金的屈服强度和屈强比，但也明显降低了延伸率。

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Study on yield loss assessments of tomato and cowpea damaged by leafminer in greenhouse and its economic thresholds

棚室番茄和豇豆受斑潜蝇为害的产量损失测定及其防治指标研究

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The reasons for yield loss of hidden damaged plants and dead stalk plants were that the sterile grain percentage increased and 1000-grain weight decreased.

隐害株和死秆株造成产量损失的原因是空秕率上升和千粒重下降。

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