Competition between Barnyardgrass (Echinochloa crus-galli) and Redroot Pigweed (Amaranthus retroflexus)
- 1 January 1984
- journal article
- research article
- Published by Cambridge University Press (CUP) in Weed Science
- Vol. 32 (2) , 218-222
- https://doi.org/10.1017/s0043174500058847
Abstract
Growth and competition of barnyardgrass [Echinochloa crus-galli (L.) Beauv. ♯ ECHCG] and redroot pigweed (Amaranthus retroflexus L. ♯ AMARE) were studied at different seed proportions, seed burial depths, and soil moisture levels. After 7 days, emergence from 1-, 2-, 4-, and 8-cm depths was 96, 90, 83, and 27% for barnyardgrass and 84, 73, 62, and 0% for redroot pigweed, respectively. Barnyardgrass was more competitive than redroot pigweed. Intraspecific competition of barnyardgrass was greater than interspecific competition from redroot pigweed. Increasing planting depth from 1 to 4 cm and increasing soil moisture from 30 to 50% (low) to 100% (high) of field capacity reduced the competitive ability of redroot pigweed.Keywords
This publication has 9 references indexed in Scilit:
- Weed Seed Decline in Irrigated Soil after Six Years of Continuous Corn(Zea mays)and HerbicidesWeed Science, 1984
- Weeds and Water in World Food ProductionWeed Science, 1977
- Soil Moisture Effects on Competitive Ability of WeedsWeed Science, 1970
- Weed Emergence from Two Soils at Various Moistures, Temperatures, and DepthsWeeds, 1967
- Growth and Development of Barnyardgrass in MassachusettsWeeds, 1966
- Ecological and Physiological Study of Echinochloa crusgalli (L.) Beauv. and the Response of Its Biotypes to Sodium 2,2‐dichloropropionate1Agronomy Journal, 1964
- Emergence of Barnyardgrass, Green Foxtail, and Yellow Foxtail Seedlings from Various Soil DepthsWeeds, 1962
- Evaluation of the Emergence Force Exerted by Seedlings of Small Seeded Legumes Using Probit Analysis1Agronomy Journal, 1956
- The Emergence of Grass and Legume Seedlings Planted at Different Depths in Five Soil Types1Agronomy Journal, 1939