施药

Willowleaf knotweed(Polygonum bungeanum Turcz.), Heartleaf cocklebur(Xanthium strumarium L.) at the dosage of 300～450 g/hm~2.The control effects of weed plant were 83%～89%,and those of fresh weight were 93%～98%.The opti...

适宜的施药时期为春小麦出苗后4~5叶期，阔叶杂草基本出齐，株高不超过5 cm，适宜的用药量为15%噻磺隆可湿性粉剂不低于300 g/hm2，在此推荐剂量下对春小麦安全。

So in the whole process of pesticide, maintain drug evenness is very important.

所以在整个施药过程中，保持药物的均匀度是非常重要的。

When applying pesticide, ware protects glove, face guard etc., avoid pesticide contacting skin, the eye and the clothes.

施药时戴好防护手套、面罩等，避免药物接触皮肤、眼睛和污染衣物。

When applying pesticide, ware protects glove, face guard etc., avoid pesticide contacting skin , the eye and the clothe.

施药时戴好防护手套、面罩等，避免药物接触皮肤、眼睛和污染衣物。

Methods:To select the nature habitant of mosquito larva density,to spray the pesticides to the water.

选择野外具有一定蚊幼虫和蛹密度的滋生场所，采用液体喷雾方法，水面喷雾施药，观察蚊幼虫和蛹的下降率；同时观察水生植物和鱼类的死亡等影响因素。

In the action of Dimilin, the diversity levels of Lepidoptera and Orthoptera insect of the treatment plot had a certain degree decline, and the diversity degrees of Hymenoptera insect and spider had a large increase, thus insect community in the treatment stand tended to be relatively stable.

在时间过程中，施药区鳞翅目和直翅目昆虫的多样性水平有一定程度的下降，但下降程度不如对照区大，膜翅目和蜘蛛的多样性水平则有较大程度的上升，因此林内昆虫群落趋于相对稳定。

The mortality and control effect are all over 99% after 7d,15d and 30d respectively, a small number of trees were infected coconut leaf beetle again after 90d and 120d respectively, most trees were found eggs and pupas after 150d , and the control effect had a slight decline, but will not cause a substantive impact on growth of center coconut leaves.

施药后第7天、15天、30天和60天害虫虫口减退率和防效均大于99%，第90天和120天个别植株重新感染少量的椰心叶甲成虫和幼虫，第150天后有一半以上的植株感染椰心叶甲成虫和幼虫，其中个别植株已经产生卵和蛹，防效产生轻微下降，但不会对椰树心叶的生长造成实质性的影响。

Ha and 2 times at 7 days interval would provide a good efficacy of rice bacterial leaf blight and rice bacterial leaf streak.

hm^2，间隔7d左右，连续施药两次，对水稻白叶枯病、水稻细菌性条斑病均有较好的防治效果。

Bt cotton and corn may affect natural enemies indirectly by decreasing the population of lepidopteran insects that serve as hosts of parasitoids or predators. Population densities of predators in Bt fields were significantly higher than those in non-Bt fields treated with insecticides for control of target pests.

杀虫剂用量的减少，降低了对天敌的杀伤力，Bt田中捕食性天敌的种类和数量均显著高于常规施药田；但Bt田内靶标害虫数量的减少和质量的降低，在一定程度上影响了寄生性天敌的种类和数量。

The Malathion was not detectable in ripe rice with once prescription of Carbofuranin and Malathion powder pesticide in the condition of Chinese natural environment.

在中国自然环境条件下用3%克马颗粒剂施药1次，收获的稻米未检出马拉硫磷。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。