Weed communities in agronomic fields are dominated by annual species. Summer annuals initiate growth each spring from seeds found in the upper soil profile (Figure 1). In most fields, a small percentage of the emerging plants survive and contribute new seeds to the soil seedbank. Historically, most research of the annual weed life cycle has focused on seed dormancy and emergence (A), effect of ...

Prosopis juliflora (Sw.) DC. (Fabaceae Mimosoideae), commonly known as Ghaf Bahri or Velvet Mesquite, an introduced exotic tree species in Oman is considered as a noxious weed. Efforts to contain this tree are labor intensive and expensive. Therefore, an efficient use of this species for socioeconomic and environmental benefits in Oman must be considered seriously. This study initiates a feasib...

This study investigates the seasonal variation of germination ability of buried seeds of Monochoria vaginalis (Burm.f.) Presl var. plantaginea Solms. The ®eld-collected seeds were buried in a ̄ooded or an upland ®eld and then exhumed monthly. The exhumed seeds were germinated under four temperature regimes. The seeds exhumed from the ̄ooded soil were dormant at the beginning of burial and proceed...

Charlock (Sinapis arvensis L.) is a serious weed of agriculture, especially in spring sown crops.  Genus Glaucium Mill. belongs to Papaveraceae and members of this genus have several alkaloids in laticiferes. The present research focuses on effects of aquatic extract of Glaucium oxylobum, G. elegans and G. grandiflorum on many physiological factors of Charlock. Laboratory studies were conducted...

In this work we present the synthesis, structural and spectroscopic characterization of Co(2+) coordination compounds with ethyl 4-methyl-5-imidazolecarboxylate (emizco). The effects of emizco, the metal salts CoCl(2).6H(2)O, CoBr(2), Co(NO(3))(2).6H(2)O and their metal coordination compounds [Co(emizco)(2)Cl(2)], [Co(emizco)(2) Br(2)].H(2)O, [Co(emizco)(2) (H(2)O)(2)(NO(2))(2).2H(2)O were eval...

Native grasses are an important design component in secondary roughs of golf courses due to minimal maintenance requirements and aesthetics. However, problems with seed germination and subsequent establishment limit their use. Two 2-year studies on ‘Cimarron’ little bluestem were conducted in 2000 and 2002 at Mississippi State University. In each study, seed was planted at five rates: 12.7, 25....

Blubaugh, Carmen K. Ph.D., Purdue University, May 2015. Undercover Predators: Vegetation Mediates Foraging, Trophic Cascades, and Biological Control by Omnivorous Weed Seed Predators. Major Professor: Ian Kaplan. Weed pressure is the most costly challenge that vegetable growers face, requiring more labor investment than other production inputs. Vertebrate and invertebrate seed predators destroy...

Weed seeds may maintain their viability when passing through the digestive tract of cattle and can be therefore dispersed by animal movement or the application of manure. Whether different cattle types of the same species can cause differential weed seed fate is largely unknown to us particularly under non-grazed systems similar to Holstein-Friesian dairy farming. We investigated the effect on ...