نتایج جستجو برای: plant pathogen
تعداد نتایج: 452140 فیلتر نتایج به سال:
In an experiment that directly manipulated grassland plant species richness and composition, decreased plant species richness (‘‘diversity’’) increased pathogen load (the percentage of leaf area infected by species-specific foliar pathogens across the plant community) in 1998. Pathogen load was almost three times greater in the average monoculture than in the average plot planted with 24 grassl...
The glassy-winged sharpshooter, Homalodisca vitripennis (Germar) (Hemiptera: Cicadellidae), is an important insect vector of the xylem-limited plant pathogen Xylella fastidiosa Wells et al. that causes diseases in numerous plant species including food and feedstock crops, ornamentals and weeds. Both the pathogen and the vector are native to the Americas, and H. vitripennis has demonstrated high...
Huanglongbing, or citrus greening, threatens the global citrus industry. The presumptive pathogens, 'Candidatus Liberibacter asiaticus' and 'Ca. L. americanus' can be transferred from citrus to more easily studied experimental hosts by using holoparasitic dodder plants. However, the interaction between 'Candidatus Liberibacter' spp. and the dodder has not been studied. We combined quantitative ...
objective(s) malva sylvestris l. (malvaceae), an annual plant, has been already commonly used as a medicinal plant in iran. in the present work, we evaluate some bioactivities of the plant extracts. materials and methods the aired-dried plant flowers and leaves were extracted by soxhlet apparatus with n-hexane, dichloromethane and methanol. the antimicrobial, cytotoxic, and phytotoxic of the pl...
Why do some exotic plant species become invasive? Two common hypotheses, increased resource availability and enemy release, may more effectively explain invasion if they favor the same species, and therefore act in concert. This would be expected if plant species adapted to high levels of available resources in their native range are particularly susceptible to enemies, and therefore benefit mo...
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