农学 >>> 农学总论 作物学 园艺学 土壤学 植物保护学 农药学 林学 畜牧学 兽医学 水产学
搜索结果: 1-15 共查到农学 Aphid相关记录20条 . 查询时间(0.079 秒)
Prociphilus (Meliarhizophagus) fraxinifolii (Riley, 1879) (Hemiptera: Eriosomatidae) is an alien species in Europe that has been spreading quickly there. This paper presents the origin and current occ...
Maximum aphid numbers on wheat are positively related to the length of the period elapsed from immigration to the population peak. We predicted that maximum abundances on late maturing cultivars would...
Russian wheat aphid is an important pest in many wheat growing countries of the world. Different resistance genes to the pest have previously been identified. However, some biotypes of the pest are vi...
Experiments on the preying capability of different stages of larvae of coccinellid and syrphid flies on the mustard aphid, Lipaphis erysimi (Kalt.), were conducted in a laboratory during the winter ...
As an alternative to synthetic pesticides, chitosan has received much attention as a biopolymer active against some agricultural pests. The, insecticidal activity of chitosans of four molecular weig...
Rhopalosiphum padi is a polyphagous species with a nearly worldwide distribution. Biological parameters of this aphid on six commonly grown wheat cultivars in the Fars province including Chamran, Da...
Population growths of three aphid species colonising winter wheat stands, Metopolophium dirhodum, Rhopalosiphum padi and Sitobion avenae, were analysed by regression method. The calculations were base...
We identify and characterise α-amylases of the two aphid species, A. fabae and A. gossypi. To do this, α-amylases of the two insect species were extracted and their activities were determined using ...
A study was conducted at Wheat Research Institute, AARI, Faisalabad, Pakistan during 2004-05 and 2005-06 to understand dynamics of aphid infestation as affected by weather and wheat sowing time. Dai...
Over 1999-2002 a research was carried out in the region of Bydgoszcz, at Minikowo, Mochełek and Topolno, on the dynamics of the occurrence and harmfulness of bean aphid (Aphis fabae complex) on ...
In laboratory studies there was observed no positive effect of azadirachtin on PVYN retention in Myzus persicae (Sulz.) which, having contracted the pathogen, were starved and next they were feeding ...
1. The study was carried out to find out the influence of adapted fertilization and insecticide application on reproductive potential and formation of dispersing morphs of mustard aphid, Lipaphis erys...
Functional responses of 2 female coccinellid predators, Scymnus levaillanti and Cycloneda sanguinea, to the cotton aphid, Aphis gossypii, at various temperatures were studied under laboratory conditi...
The greenbug, Schizaphis graminum (Rondani), and bird cherry-oat aphid, Rhopalosiphum padi L., are aphid pests of wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), sorghum (Sorghum bicolor L....

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...