Agricultural weeds have rapidly adapted to intensive herbicide selection and resistance to herbicides has evolved within ecological timescales. Yet, the genetic basis of broad-spectrum generalist herbicide resistance is largely unknown. This study aims to determine the genetic control of non-target-site herbicide resistance trait(s) that rapidly evolved under recurrent selection of the novel li...

A wild population of a plant species, especially a cross-pollinated species, can display considerable genetic variation. Genetic variability is evident in differential susceptibility to an herbicide because the population can show continuous phenotypic variation. Recent, recurrent selection studies have revealed that phenotypic variation in response to low herbicide rates is heritable and can r...

This article describes how to diagnose injury symptoms from herbicides commonly used in sugarcane and rotational crops southern Florida based on their mode of action. information is intended help growers pinpoint sources off-target movement, carryover, or improper use herbicides. Written by Calvin Odero, Matthew VanWeelden, Christian Kammerer, published the UF/IFAS Agronomy Department, May 2023.

To study the long-term usefulness of genetically-modified agriculture via herbicide-tolerant crops, a simulation model is built by focusing on the fundamental environmental feedback mechanisms. The most critical mechanism is the evolution of resistance in weeds via natural selection. Agricultural sustainability is investigated under different policies and scenarios, in comparison with conventio...

Experiments were conducted in a laboratory and an outdoor mesocosm system to evaluate the liquid AVAST!® fluridone formulation for control of Eurasian watermilfoil (Myriophyllum spicatum). In addition, physiological assays were used to monitor plant injury during herbicide exposure. Eurasian watermilfoil was planted in 52-L aquaria, grown to precanopy condition (21 days), then dosed with 0, 10,...

In order to investigate physiological and biochemical changes of wheat under stress residue of Imazethapyr herbicide (Imazethapyr), an experiment was conducted in a completely randomized design with four replications in greenhouse conditions at university of Mohaghegh Ardebili. The treatments consisted of five dose levels of herbicide Imazethapyr (0, 0.011, 0.022, 0.033 and 0.044 micrograms of ...

Green pigweed [Amaranthus powellii S.Wats.] is a prolific annual dicot weed that prominent of crop production in northeastern North America. interference has been documented to reduce corn yields up 54% the absence control strategies. In 2021, green biotype from field near Dresden, Ontario, Canada was determined be resistant MCPA, mecoprop, dichlorprop-p, aminocyclopyrachlor (synthetic auxins),...