نتایج جستجو برای: سفیدبالک پنبه bemisia tabaci

تعداد نتایج: 4196  

2013
Huipeng Pan Qi Su Xiaoguo Jiao Long Zhou Baiming Liu Wen Xie Shaoli Wang Qingjun Wu Baoyun Xu YouJun Zhang

The impact of symbionts on their insect hosts depends on their infection density. In the current study, we investigated the effects of host plants (cucumber, cabbage, and cotton) on the relative amount of symbionts Portiera and Hamiltonella in the whitefly Bemisia tabaci (Gennadius) Q. The relative amounts of symbionts in 3 host plant B. tabaci Q populations with the same genetic background wer...

Ali Rajabpour, Fatemeh Yarahmadi Leila Ramezani Nooshin Zandi Sohani

Objective: Sweet potato whitefly, Bemisia tabaci Gen. (B. tabaci), is one of the most important pests of various greenhouse crops in Iran. Nowadays, chemical insecticides are broadly used for control of the pests that causes risk to consumer's health. For the first time, contact toxicity of Pelargonium roseum Andrews and Artemisia sieberi Besser essential oils on B. tabaci and its possible appl...

2012
Maria Jose Rodríguez-López Elisa Garzo Jean Patrick Bonani Rafael Fernández-Muñoz Enrique Moriones Alberto Fereres

BACKGROUND The whitefly Bemisia tabaci (Genn.) causes dramatic damage to plants by transmitting yield-limiting virus diseases. Previous studies proved that the tomato breeding line ABL 14-8 was resistant to B. tabaci, the vector of tomato yellow leaf curl disease (TYLCD). This resistance is based on the presence of type IV glandular trichomes and acylsucrose production. These trichomes deter se...

2004
A. C Cohen

Geocoris punctipes (Say), a predaceous lygaeid not previously documented as a whitefly predator, was tested in the laboratory as a natural enemy of the sweet potato whitefly, Bemisia tabaci (Genn.). Its stalking behavior with whiteflies as prey was similar to that observed with aphids. A previously unobserved behavior was noted that involves the predators using salivary secretions to fasten the...

2014
Fang-Zhou Ma Zhi-Chuang Lü Ren Wang Fang-Hao Wan

With advancing global climate change, the analysis of thermal tolerance and evolutionary potential is important in explaining the ecological adaptation and changes in the distribution of invasive species. To reveal the variation of heat resistance and evolutionary potential in the invasive Mediterranean cryptic species of Bemisia tabaci, we selected two Chinese populations-one from Harbin, N Ch...

2017
Tianni Gao Zhaolei Wang Yü Huang Nemat O. Keyhani Zhen Huang

The emergence of insecticide resistant insect pests is of significant concern worldwide. The whitefly, Bemisia tabaci, is an important agricultural pest and has shown incredible resilience developing resistance to a number of chemical pesticides. Entomopathogenic fungi such as Isaria fumosorosea offer an attractive alternative to chemical pesticides for insect control, and this fungus has been ...

2002
Francisco J. Morales

Introduction The whitefly Bemisia tabaci Genn. (Homoptera:Aleyrodidae) has caused millions of dollars worth of crop losses in tropical and subtropical agricultural regions in the five continents of the world (Brown, 1994). Besides the direct damage caused by B. tabaci (plant nutrient loss; physiological disorders; honey dew excretions, etc), the sweet potato or cotton whitefly is an efficient v...

Journal: :Mycologia 2007
Nathalie Gauthier Cécile Dalleau-Clouet Jacques Fargues Marie-Claude Bon

The hyphomycete Paecilomyces fumosoroseus (Pfr) is a geographically widespread fungus capable of infecting various insect hosts. The fungus has been used for the biological control of several important insect pests of agriculture. However knowledge of the fungus' genetic diversity and population structure is required for its sustainable use as a biological control agent. We investigated length ...

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