Pre-emergence herbicide residues were detected in domestic wells sampled near Tracy, CA. This study sought to determine the source of contamination by comparing soil distribution of diuron [N'-(3,4-dichlorophenyl)-N,N-dimethylurea] and hexazinone [3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione] in an agricultural field where the soil was a cracking clay to infiltration ...

Field and greenhouse experiments were conducted during 2005 and 2006 at Stoneville, MS, to determine control of ragweed parthenium with several preemergence (PRE) and postemergence (POST) herbicides registered for use in corn, cotton, peanut, rice, and soybean. Norflurazon, pendimethalin, clomazone, diuron, fluometuron, pyrithiobac, dimethenamid, flumetsulam, imazaquin, s-metolachlor, metribuzi...

The California Department of Pesticide Regulation initiated regulations on pesticide use in 1989 to mitigate groundwater contamination by atrazine [6-chloro--ethyl-'-(1-methylethyl)-1,3,5-triazine-2,4-diamine] and subsequently for simazine (6-chloro-,'-diethyl-1,3,5-triazine-2,4-diamine), diuron ['-(3,4-dichlorophenyl)-,-dimethylurea], bromacil [5-bromo-6-methyl-3-(1-methylpropyl)-2,4(1,3)-pyri...

The Environmental Hazards Assessment Program of the California Department of Food and Agriculture conducted a well survey in Tulare County to determine the presence of the herbicides simazine, atrazine, prometon, bromacil and diuron in well water. These herbicides were chosen because of their use on crops grown in Tulare County and on rights-of-way throughout the state. Twelve sampling areas we...

Farmers have increased the production of food by using chemical substances such as diuron; however, these components affect water quality and species found in ecosystems. Macrobrachium acanthurus M. olfersii postlarvae present estuary Río Jamapa, Veracruz were collected to measure LC50 LD50 herbicide Karmex (diuron: (3-(3,4-dichlorophenyl)-1,1-dimethylurea [DCMU]). The captures prawns made with...

The intensity of the "steady-state" fluorescence of "aerobic" Anacystis nidulans is variable under prolonged illumination with orange (590 mmu) or blue (440 mmu) light for both normally photosynthesizing and DCMU-poisoned cells. In general, orange light illumination causes an increase of the fluorescence intensity followed by a decrease, while blue light causes an increase until a steady level ...

The use of biostimulants in the bioremediation polluted soils order to eliminate/reduce toxic effects pesticides on soil is currently a very common environmental practice. In this study, we studied effect three obtained from sewage sludge by way an enzymatic hydrolysis and fermentation process diuron-contaminated for 55 days under laboratory conditions. During period time, activities, bacterial...

After the United Nation’s International Maritime Organization banned the use of organotins in antifouling products, organic booster biocides were introduced as alternatives to these compounds. The purpose of this study was to measure concentrations of the antifouling agent Irgarol 1051, its major metabolite M1 (aka GS26575), and other antifouling pesticides (diuron, chlorothalonil, dichlofluani...

Herbicides, Photosynthesis, Highand Low-Affinity Binding, Thylakoids, Algae Highand low-affinity binding o f photosystem II herbicides to isolated thylakoids of Spinacia oleracea and to intact cells o f the unicellular green alga Ankistrodesmus braunii were investigated. Complete mutual displacement o f bound diuron-type herbicides (e.g. diuron, atrazine, terbutryn) by either diuronor phenol-ty...