Exotic insect pests can produce both short-and long-term effects on forest ecosystems.
外来害虫可以对森林生态系统产生短期和长期的影响。
Scientists have made genetic modifications to cotton to increase its resistance to insect pests.
科学家对棉花进行了基因改造，以增强其对害虫的抵抗力。
According to farmers' report, the amount of insecticide needed per acre to control insect pests was only slightly lower for those who tried the modified seed than for those who did not.
根据农民的报告，试验转基因种子的人与没有试验的人相比，每英亩用于控制害虫的杀虫剂用量只是稍微少一点。
Grain storage of insect pests.
贮藏谷物的害虫。
They are highly destructive insect pests.
他们是破坏性极大的有害昆虫。
Blaustein: We would have a heck of a lot more insect pests around.
布劳斯汀：我们身边会多出许多许多害虫。
Corn is attacked by a number of plant parasites and insect pests.
玉米受到一些植物寄生虫和虫害的侵害。
In exchange, they enrich the soil, pollinate flowers, and gobble up insect pests.
作为交换，他们丰富的土壤，花授粉，并吞噬害虫。
The future of bio-control technology of crops diseases and insect pests was prospected.
展望了农作物病虫害生物防治技术的发展前景。
Use the trap insect pests prevention and control should be combined with chemical control.
利用诱捕器防治害虫应与化学防治相结合。
It is necessarily to monitor crop diseases and insect pests in integrated pest managerment.
农作物病虫害监测是有害生物综合防治必不可少的环节之一。
The peach leafhopper (Typhlocyba sudra) is one of the important insect pests of peach tree in Guiyang.
桃一点小叶蝉在贵阳是桃和碧桃的重要害虫之一。
Often very annoying weeds, goldenrods crowd out less hardy plants and act as hosts to many insect pests.
杂草和秋麒麟草通常令人生厌，它挤走不那么顽强的植物，并找来很多害虫。
The Chinese kept tiny fossilized fish in their food stores to keep away insect pests called silverfish .
中国人在储存食物的处所放上一小块鱼化石来驱走所谓的蠹虫。
Some crops have been genetically engineered to contain Bt, a bacterium that controls certain insect pests.
一些作物已经进行基因改造而包含蓝四氮唑，也就是控制某些病虫害的一种病菌。
Occurrence Rule and Control Measure of Main Diseases and Insect Pests on Liriope spicata ( Thunb ) Lour .
与麦冬主要病虫害发生规律及防治措施> > 相似的文献。
A similar idea already exists in agriculture, where farmers use non-harvested 'trap crops' to lure insect pests.
当农夫用非收割的诱虫作物诱骗昆虫时，一个类似的方法已经用于农业。
The insufficient ventilation also causes poor plant growth and the insect pests of scale insects and spider mites.
通风条件不足，也能导致植物生长不良和发生较为严重的蚧虫类、红蜘蛛类等危害。
This paper is a study of heavy smoke agent of pesticide using in field control on plant diseases and insect pests.
本文研究了农药重烟剂防治田间农作物病虫害的可能性，并对应用技术和使用方法进行了探索。
Conventional cotton production relies heavily on chemical pesticides to control caterpillars and other insect pests.
常规棉生产严重依赖化学杀虫剂来防治毛虫和其他虫害。
Bioactivities and functional modes of plant extracts against insect pests were systematically studied in this paper.
本文系统研究了植物提取物对主要蔬菜害虫的生物活性及作用方式。
There have been many reports on the diseases and insect pests on yellow peach, but most of them are not practical knowledge.
锦绣黄桃是桃树之一，有关它的病虫害防治的报道较多，但未见实用技术知识内容。
Cold storage treatments for fresh fruit and vegetables are approved around the world for a range of quarantine insect pests.
全世界批准对新鲜水果和蔬菜进行冷藏处理以对付一些检疫性害虫。
The results showed that: (1) There were 59 species of insect pests (24 species) and natural enemies (35 species) in this corn field.
结果表明：（1）在棉区夏玉米田共有害虫和天敌59种，其中害虫24种，天敌35种。
The economic thresholds of insect pests are the most important distinguish basis in the scientific management system of forest pests.
在森林害虫科学管理决策专家系统中，害虫危害的经济阈值是最重要的判别依据。
Bamboos amass in Anji bamboo Genus Garden with large varieties, long periods of forming bamboo and various diseases and insect pests.
安吉竹种园竹林面积集中，竹类品种多，出笋延续时间长，病虫害种类多而且活动规律复杂。
This paper attempts to draw a general relationship between crop yield loss and chewing injury of reproductive organs by insect pests.
本文试从分散的材料中概括出主要大田作物繁殖器官被害与产量损失之间的一般关系。
This paper attempts to draw a general relationship between crop yield loss and chewing injury of reproductive organs by insect pests.
本文试从分散的材料中概括出主要大田作物繁殖器官被害与产量损失之间的一般关系。
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