Folia Horticulturae

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Changes in weed community infesting common bean crop

Piotr Chmielowiec*, Andrzej Borowy**

**PlantiCo Horticultural Breeding and Seed Company
**Strugi, 96-516 Szymanów, Poland
**Department of Vegetable Crops and Medicinal Plants
**Faculty of Horticulture, Agricultural University in Lublin
**St. Leszczyńskiego 58, 20-068 Lublin, Poland
**e-mail: katwarz@agros.ar.lublin.pl

In three-year field experiment common bean (Phaseolus vulgaris L.) ‘Bona’ was cultivated for harvest of green pods and dry seeds. Weed species, their growth stages, number and fresh weight were determined every two weeks starting from the third week after sowing till harvest of beans. 38 weed species, mainly annual dicotyledonous were found and Amaranthus retroflexus, Chenopodium album, Echinochloa crus-galli and Galinsoga parviflora dominated in the experiment. Majority of weeds emerged during the first three weeks after sowing, some of them germinated in two following weeks and then their number decreased gradually. Fresh weight of weeds increased rapidly from the third till fifth - seventh week and then much slower during the next few weeks and finally it decreased as a result of decaying of some weed species. All annual weeds attained fruiting stage and some species finished their vegetation till time of harvest of bean seeds.

Chmielowiec P., Borowy A., 2005. Changes in weed community infesting common bean crop. Folia Horticulturae 17/1: 3-10.