Natural products are one of the resources for discovering novel pesticide leads. Here, by molecular hybridization between natural enamino diketone skeleton and reported herbicide lead compound I, a series 3-(1-aminoethylidene)-6-methyl-2H-pyran-2,4(3H)-dione derivatives (APD) were rationally designed, synthesized tested herbicidal activity in greenhouse. The bioassay results showed that most ta...

Abstract Complaints of control failures with acetolactate synthase (ALS)- and protoporphyrinogen oxidase (PPO)-inhibiting herbicides on redroot pigweed ( Amaranthus retroflexus L.) were reported in conventional soybean [ Glycine max (L.) Merr.] fields North Carolina. Greenhouse dose–response assays confirmed that the Camden County Pasquotank populations less sensitive to ALS- PPO-inhibiting com...

Amaranthus retroflexus L. (Amaranthaceae), Redroot pigweed, is native to North America, but has become a weed of agriculture worldwide. Previous research into competition with food crops found it significantly reduces yields. Additionally, taxonomy, biomass allocation, physiological responses light intensity, water stress, elevated CO2, and herbicide resistance have been investigated. To extend...

the potential mycoherbicide alternaria alternata was isolated from one lesion on a leaf of amaranthus retroflexus which had been inoculated with conidia of the fungus. the isolate was cultured on v-8 agar medium. hyphal tip isolates (hti) were derived from young germ tubes of single spores and cultured on a semidefined culture medium with a c:n ratio of 15:1. amplified fragment length polymorph...

Plant defensive metabolite Alkaloid were screened for analyzing their antimicrobial property. The present study quantified the alkaloids present in selected members of tribe Amarantheae. Maximum percentage of alkaloids are shown by Amaranthus tricolor L., Aamaranthus viridis L. and Amaranthus caudatus L. (88.8%) and the least were shown by Amaranthus spinosus L. and Amaranthus dubius Mart. (5.8...

Weed seed persistence in the soil seedbank is central to weed population dynamics; however, limited knowledge of mechanisms regulating seed survival in soil remains an obstacle to developing seed-bank management practices. Weed seeds are rich in carbon and nitrogen, and therefore may represent an important nutritional resource to soil microbes. The objective of this study was to test the hypoth...

Amaranthus retroflexus L. and Chenopodium album are noxious weeds that have a cosmopolitan distribution. These species successfully invade adapted to wide variety of diverse climates. In this paper, we evaluated the morphology biochemistry 16 populations A. 17 C. Seeds from collected Spain, France, Iran were grown together at experimental field agriculture research University Mohaghegh Ardabili...