in order to identify and determine weed population in sugar beet fields, 92 fields from five counties of kermanshah province in iran were selected and evaluated at two growing stages (early may and late september) in 2014. the weed population indices were calculated by counting the number of weeds separated on othe basis of genus and species. for all fields, the latitude, longitude and altitude...

Background: The incidence of allergic and asthmatic diseases has been continuously increased in both industrial and developing countries. Extracts from various known allergens are used for the diagnostic and therapeutic purposes. Objective: To investigate the effects of an extract prepared from Chenopodium album (Ch.A.) pollen to induce allergic asthma in BALB/C mice. Methods: BALB/C mice were ...

Single amino acid substitutions in the D1 protein of photosystem II may cause resistance to various herbicides. In all organisms studied these substitutions are located in or between helices IV and V of the protein. The increasing number of herbicide-resistant organisms necessitates development of a rapid methodology to characterize deviations from the wildtype sequence. Here, two procedures ar...

Chenopodiacea/Amaranthacea pollen is an important cause of respiratory allergy around the world. The problem could be aggravated because in desert or desert-like countries, these weeds are used in greening programmes or as ornamental plants. As climate tendencies should maintain in future decades, relevance of Chenopodiacea/Amaranthacea pollen allergy will go up. Relationship between airborne p...

Neighbors of Se hyperaccumulators Stanleya pinnata and Astragalus bisulcatus were found earlier to have elevated Se levels. Here we investigate whether Se hyperaccumulators affect Se localization and speciation in surrounding soil and neighboring plants. X-ray fluorescence mapping and X-ray absorption near-edge structure spectroscopy were used to analyze Se localization and speciation in leaves...

Abstract The bionomics and distribution of Scythris sinensis (Felder Rogenhofer, 1875) were studied in Hungary from 2004 to 2018. host plant was found be Chenopodium album L. larva feeds on the leaves a loose web. length larval stage varies 12 15 days, that pupal 7 10 days summer generation. species is generally bivoltine Hungary, but southern, warmer areas third partial generation may occur. A...

Soybean field experiments were performed to investigate the weed-suppressing effects of different tillage systems and cover crop mulches at two locations in southwest Germany during 2014 and 2015. The influence of three different tillage systems on weed control efficacy, soybean plant density, and crop yield was determined. In the no-till system (NT), two different cover crops, (rye and barley)...