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: 1-13 共查到农学 Natural enemies相关记录13条 . 查询时间(0.109 秒)
Key scale insects that have long been considered as having high economic importance in Tunisia and for which several research studies and pest management programs have been undertaken include the meal...
The set of 7 flowering plant species (Anethum graveolens, Calendula officinalis, Centaurea cyanus, Fagopyrum esculentum, Foeniculum vulgare, Tagetes patula and Vicia faba) was compared for their attra...
Predation by natural enemies was studied as mortality factors of Hylesinus fraxini in 2006–2007. Predation by birds was not recorded and predation rate by insect reached 0.1%. Only one insect predator...
Occurrences of pea aphids and their natural enemies (syrphids, mummies caused by entomopathogenic fungi Beauveria sp. and by the parasitic wasp Aphidius ervi) were compared in monocultures and mixtu...
The paper deals with the occurrence, development and natural enemies of the cecidogenous aphid Pemphigus gairi Stroyan (Pemphigidae). The aphid abundantly occurred on leaves of Populus nigra and P. ni...
The present study aimed to investigate the prey preference of the omnivorous bug Dicyphus tamaninii Wagner (Heteroptera: Miridae) among 5 different prey species, and its interaction with 3 different n...
A study from 2002 documented the occurrence of natural enemies (parasitoid wasps, predatory fl ies, entomopathogenic fungi) associated with colonies of the Russian wheat aphid, Diuraphis noxia (Kurdju...
Laboratory and field investigations were conducted to identify the natural enemies of Mikania micrantha H.B.K. and to evaluate their efficacy as biocontrol agents. During a survey on the distributio...
This study was carried out from 1991 to 1993, in Van province (Erciş, Edremit, Gevaş), which aimed to find out the population fluctations, some biological characteristics and natural enemie...
Centaurea solstitialis L., yellow star thistle, is an annual weed that belongs to the family Asteraceae. In Turkey, this weed can be found in pasture areas, along roadsides, in cultivated areas and i...
A field experiment was conducted to study the effect of different nitrogen fertilizer rates i.e. 200, 100 and 0 kg N/ha in paddy fields at International Rice Research Institute, Manila, Philippines. B...
Three species of rice leaf folders occur in Madurai district viz., Cnaphalocrocis medinalis (Guenee), Marasmia patnalis (Bradley) and Marasmia ruralis (Walker) among which the former was dominant. T...
To investigate the impact of different cropping systems, the pests, their hymenopteran parasitoids and predatory ground beetles present in two spring rape crops in Estonia, in 2003, were compared. One...

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...