棉蚜

LC50 of common cutworm to Bt insecticide was 1170PPm. Investigation in field displayed that larval densities in two Bt cotton lines were nosignificant difference from conventional cotton line.

室内生测和大田试验表明，与常规棉泗棉3号相比，Bt棉6K19和BG1560对棉蚜的存活率、生活历期及繁殖力均无显著影响，Bt棉与常规棉田棉蚜的发生动态及为害情况也一致。

The producing time of sexuparae aphids by the cotton specialized aphids was earlier than that by the cucumber specialized aphids, whereas the apterous aphids produced by cucumber specialized aphids were significantly more than those by cotton specialized aphids.

结果表明：两寄主专化型棉蚜在产生有性世代能力上存在显著差异，表现为棉花型棉蚜在诱导后代中产生有翅蚜、雄性母和雌性母的比率显著高于瓜型棉蚜，并且雌、雄性母产生的时间明显早于瓜型棉蚜。

The results indicated that Erigonidium graminicola, C.sinica were the major natural enemies affecting Aphis gossypii, followed by Tetragnathidae, Chrysopa septempunctata and Therdion octomaculatum.(6) The temporal and vertical niche breadth and overlap of Aphis gossypii and its natural enemies were analyzed.

从时间和空间两个角度对棉蚜与天敌种群的生态位宽度及其重叠情况进行分析，表明草间小黑蛛、大草岭、肖峭蛛等天敌在时间上和空间上均与棉蚜有较高的重叠度，可视为棉蚜主要天敌。

The Erigonidium graminicola, Chrysopa septempunctata, Tetragnathidae and Tromobidiidae had high overlap grad with Aphis gossypii were its main natural enemies.(7)Investigations on the spatial construction and distribution of Aphis gossypii and Erigonidium graminicola at different period from 2002.4 to 2002.11. The results indicated that the semivariogram of them could be described by spherical model.

结果表明：从 2002年 4月至 2002年 11月，棉蚜种群和草间小黑蛛种群半变异拟合函数均为球形，即表明二者空间分布均为聚集型：棉蚜变程为7.33叶2.4几草间小黑蛛变程为6.47－20.88，表明二者可在相近的范围内形成聚集区，草间小黑蛛种群对棉蚜种群在空间位置上有追随效应。

The result of experiment on different chemical control shows the best chemicals for cootrol Eriosoma lanigerum in the part trees above ground is 40%omethoate adding 1‰ washing powder (the ratio is 1:800). Applying 0.25 kg fortified benzene to the root of each tree can kill Eriosoma lanigerum in the root. In the past three years, chemical control as first, complementary with the measures of integrated control and quarantine techniques, the percentage of suffered trees in Malus pumila garden of 40.8 hm2 in Yimen County has decreased from 48.5%to 2.65%.

不同药剂的防治试验结果表明：40％的氧化乐果1：800倍液加1％o的洗衣粉是防治苹果地上部分棉蚜的较佳药液；另每株根施0.25kg高丙体内吸粉剂对根部的苹果棉蚜具有较好的杀灭作用。3年来，以化学防治为主，辅以配套的综合防治及检疫技术措施，使易门40.8hm2苹果园的植株受害率由48.5％降至2.65％，取得了较好防治效果。

Moreover, the obligative parthenogenesis individuals had been found in the cucumber specialized aphids, but not in the cotton specialized aphids.

瓜型棉蚜在诱导条件下产生无翅孤雌蚜的比率显著高于棉花型棉蚜，并且发现有不产生有性世代的营专性孤雌生殖个体，而在棉花型棉蚜中没有发现。

With the results of monitoring the spatial patterns of cotton aphid populations in various stages, there are distinct spatial heterogeneity in the distribution of cotton aphid under large and small scales in different stages.

通过对大尺度和小尺度下不同阶段的棉蚜变异函数模型的拟合，得出大尺度和小尺度棉蚜空间分布在棉蚜种群不同发生阶段具有空间异质性，研究区域内，小尺度下棉蚜种群的空间异质性格局中平均有77.6%是由棉蚜种群内部的空间自相关造成的，而大尺度下这个比例达85%。

The results showed that the effective period on cotton aphid was only 5 days by using spraying method, while cotton seed mixed with a larger dosage of Carbofuran lasted 10 days.

结果表明：喷雾法施药，久效磷在棉苗中对棉蚜的有效控制期为5天；克百威粒剂拌种施药，用药量虽大，但对棉蚜有效控制期仅为10天；涂茎法施药，药剂用量少，棉苗中药剂浓度高，对棉蚜的有效控制期可达12天以上。

The results sh~wed that there were significant differences between sexual forms and parthenogenetic forms of cotton aphid with characteristic bands appeared.

棉蚜性蚜人工诱导的试验结果表明：14C和 18'C下能诱导性蚜产生，而 22℃下诱导则不产生性蚜，可以估计棉蚜性蚜产生的临界温度约为 20'C左右。14℃、18℃下随光照时间的缩短棉蚜性蚜比例有提高的趋势。

The year trend of cotton aphid could be simulated with a three cubed polynomial. Furthermore, Cotton's year periodicity could be divided into two periodicities, front 55 d first periodicity, the other latter 128 d, and a new periodicity's function was also given with new phase angle.

棉蚜种群数量的趋势性曲线可以用一个多项式来拟合；棉蚜的在一年之内的周期可以分为两段：前55d可看作一个周期，后128d可看作一个周期，并根据周期相角重新给出棉蚜种群数量的周期函数。

This brought fixed cost, but it also is meant at the same time use a source to won't make you singlehanded assume a problem.

这带来了一定的成本，但它同时也意味着使用开源不会让你独力承担问题。

He gained a small fortune in real estate.

他在房地产上发了一笔小财。