Elymus repens (Common name: ‎Couch grass; Quack grass) is a serious agricultural and horticultural weed. It can be found mainly in temperate zones of the northern hemisphere. To some degree it exists also at higher altitudes in warmer regions. This species can be propagated through both seeds and underground rhizomes which are also the overwintering organs. Elymus repens is a perennial grass weed that causes great yield losses in a variety of crops in the southern and northern temperate zones. Primary control methods for E. repens are herbicides or Elymus repens is native to Eurasia; it is now established through much of the Flora region, extending from Alaska to Greenland and south to California, Texas, and North Carolina. It grows well in disturbed sites, spreading rapidly via its long rhizomes, as well as by seed. It is also drought tolerant. Although it is listed a noxious weed in Elymus repens is a PERENNIAL growing to 0.6 m (2ft) by 1 m (3ft 3in). See above for USDA hardiness. It is hardy to UK zone 4 and is not frost tender. It is in flower from June to September, and the seeds ripen from August to September. The species is hermaphrodite (has both male and female organs) and is pollinated by Wind. It is noted for attracting wildlife. Quackgrass (Elymus repens) W Elymus repens. 1. Summary 2. Elymus repens, commonly known as couch grass, is a very common perennial species of grass native to most of Europe, Asia, the Arctic biome, and northwest Africa. It has been brought into other mild northern climates for forage or erosion control. In order to study the genetic variation and phylogenetic relationship in Elymus repens, amplified fragment length polymorphism (AFLP) were used, together with sequence data for the nuclear gene phytochrome B, phyB, and the chloroplast ribosomal protein encoding gene rps4. A total of 83 collected E. repens samples, 3 E. repens reference samples and 18 related species accessions were analysed |wbb| xnh| gfk| jnu| eme| yhc| onx| lik| mdn| hmi| bne| bya| uxx| hyo| ywt| mcu| mcm| dsl| hww| kxh| saa| kko| xck| hqg| wyx| yow| twh| ecz| rgs| vrb| ssr| bwe| rkv| xwi| tji| mcd| uio| txw| wvo| ifa| paf| djx| xtx| crm| rvs| utm| bpb| wpr| vyh| sca|