As animal grazing has intensified within Kentucky and the surrounding region problematic weeds such as tall ironweed, spiny amaranth, horsenettle, buttercup, common cocklebur, and thistles have been increasing. These weeds become prominent in pastures because they have spines, thorns, or are unpalatable to animals. Animals selectively graze and avoid these weedy plants and with intensive grazin...

Holoparasitic broomrape weeds (Orobanche and Phelipanche spp.) are a major biotic constraint limiting the production of important food crops. Parasitism caused by spp. is considered to be serious threat, particularly in Mediterranean region. In this study, species collected from infested fennel fields Sid L’Mokhtar Central West Morocco was described identified morphologically molecularly. For m...

Weed management must be based on integrated plant protection methods that minimise economically unacceptable loss of crop yield but preserve the contribution of weeds to biodiversity. The on-line decision support system “Weeds” has been developed to assist in achieving this balance by the selection of appropriate herbicides and the calculation of appropriate doses to control the weeds present i...

The existence of aquatic weeds in waterways causes several major problems. Some of them are the obstruction of water flow and navigation, island formation, increase of water losses due to evapotranspiration, and difficulty of water arrival to canal ends. This paper aims to discuss the resulting velocity profile changes due to aquatic weeds. Also, it examines the effect of such weeds on the chan...

Palmer amaranth (Amaranthus palmeri) is known to be glyphosate-resistant and one of the most common and troublesome weeds in Arkansas cotton production. Glufosinate is known to provide good control of 1-4 inch Palmer amaranth, but control of larger weeds is erratic. The lack of control provided by glufosinate on large weeds may be caused by coverage issues. The objective of this study was to ev...

parasite weeds are the most important yield reducing factors, and among them dodder (cuscuta campestris l.) is an obligate parasite of many plant families. in order to find a suitable biocontrol agent for dodder a study was conducted based on a randomized complete design with four replications at research greenhouse of faculty of agriculture, ferdowsi university of mashhad, iran during 2007-200...

Uncontrolled weeds cause considerable losses in the grain yield of pigeonpea. Field experiments were conducted for seven years from 1998 to 2004 on a loamy sand soil to study the effect of weed management on weeds, growth and grain yield of pigeonpea. In some years, weed dry matter was higher than in others, due to variation in rainfall received. Two hand weedings, pendimethalin in integration ...

ABSTRACT Xanthomonas campestris pv. campestris (X. campestris) infects a large number of cruciferous plants, including weeds. California has one of the largest and most diverse populations of wild cruciferous plants in the world. Although considerable information is available on the genetic diversity of X. campestris in commercial crop plants, nothing is known about the diversity in strains inf...

Weeds are a nuisance in a variety of land uses. The increasing prevalence of both herbicide resistant weeds and bans on cosmetic pesticide use has created a strong impetus to develop novel strategies for controlling weeds. The application of bacteria, fungi and viruses to achieving this goal has received increasingly great attention over the last three decades. Proposed benefits to this strateg...

Weeds pose a major threat to world agriculture by reducing detrimentally crop yield and quality. However, at the same time, weeds are major interacting components of the agroecosystems. Abundance and diversity of weeds vary significantly among the several communities. In order to evaluate each community’s structure and the interactions among them, several population indices are used as key tool...