to study the effect of different weed control methods in tomato, an experiment was conducted as completely randomized block design with three replications at the research farm of university of tehran (karaj) in 2008. the treatments consisted of post emergence (at recommended rate) or pre emergence (reduced rate in combination with mulch) application of metribuzin, rimsulfuron and sulfosulfuron,...

Herbicides are usually applied multiple times by growers for season long weed control in Florida citrus (Citrus sp.). Rimsulfuron, a sulfonylurea herbicide has been recently registered for control of certain grasses and broadleaf weeds in citrus. To increase the weed control spectrum and reduce application cost, citrus growers often prefer to tank mix herbicides. Field experiments were conducte...

Registered dose of herbicides may be higher than rate required for controlling weed species depending on growth stages. In order to study the effect of individual post-emergence application of 2,4-D plus MCPA and three sulfonylurea herbicides at four- to six-true leaf stage of weeds, experiments were conducted in 2011 at the greenhouse of Agricultural Faculty of Ferdowsi University of Mashh...

Many countries are now facing the problem of increase in resistant biotypes weeds. The spread herbicide-resistant weeds across agrophytocenoses poses a threat decrease effectiveness use herbicides agricultural fields. In order to develop anti-resistant compositions for protection maize (Zea mays L.) crops, we studied effects interaction and efficiency weed control greenhouse field experiments. ...

A Section 3 registration is being requested for ShadeoutJ which contains the herbicide, rimsulfuron. This registration is for a new use of rimsulfuron to control weeds in tomato fields. The proposed tolerance for rimsulfuron on tomatoes is 0.1 ppm. The critical acute No-Observed-Effect Level (NOEL) was 500 mg/kg/day based on a ruffled fur and transient weight losses in rats after a single expos...

one of the most important adverse environmental effects of herbicide application in production systems is possible damage to non-target plants, such as crops that are grown in rotation. nicosufuron+rimsulfuron (ultima) is a sulfonylurea herbicide that recently registered for use in maize fields in iran. its residues may be present more than a season in certain conditions. to measure nicosufuron...

Panicoid grasses are major weeds of maize and sugarcane as well as of several other important grains, including sorghum, pearl millet, and foxtail millet. Pot trials were conducted to study the activity and potential interactions of topramezone in mixture with recommended rates of rimsulfuron or nicosulfuron on three annual panicoid grasses (i.e. Echinochloa oryzoides, E. phyllopogon, and Panic...