Interplanting grasses into alfalfa controls weeds in older stands
AuthorsTimothy S. Prather
W. Thomas Lanini
Jerry L. Schmierer
W. Mick Canevari
Rose L. Krebill-Prather
Authors AffiliationsT.S. Prather is Assistant Professor and Extension Specialist, Weed Ecology, Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, and former UC IPM Weed Ecologist, Statewide IPM Project; W.T. Lanini is CE Weed Ecologist, Department of Vegetable Crops, UC Davis; S. Orloff, W.M. Canevari, K. Hembree, S. Mueller and W. Bendixen are Farm Advisors, Siskiyou, San Joaquin, Fresno, Fresno and Santa Barbara counties, respectively; R. Vargas is County Director and Farm Advisor, Madera County; J.L. Schmierer is Agronomy Farm Advisor, Colusa County; W.M. Canevari, is Farm Advisors, Siskiyou, San Joaquin, Fresno, Fresno and Santa Barbara counties, respectively; S. Mueller is Farm Advisors, Siskiyou, San Joaquin, Fresno, Fresno and Santa Barbara counties, respectively; W. Bendixen is Farm Advisors, Siskiyou, San Joaquin, Fresno, Fresno and Santa Barbara counties, respectively; R.L. Krebill-Prather is Sociologist, Statewide IPM Project, UC Davis.
Hilgardia 54(6):37-41. DOI:10.3733/ca.v054n06p37. November 2000.
Interplanting grasses into alfalfa effectively uses grass competition to reduce the amount of weeds in alfalfa hay. The increased production offsets a lower price for the hay content, making the alfalfa-grass hay equally profitable to alfalfa hay sprayed with herbicide. This technique avoids plant-back restrictions from use of some herbicides. Alfalfa weevil populations can be reduced below threshold levels, providing additional benefit from the technique. The percentage of growers interplanting did not change but nearly half of the 24% of growers using interplanting are new users of the technique. Cooperative Extension was viewed as the most useful source for interplanting information by 64% of farmers surveyed.
Bendixen WE, Lanini WT. Interplanting cereals and grasses during the last year of an alfalfa stand. In Proc. Calif. Weed Conf 1993. Fremont, CA: 101.
Lanini WT, Orloff SB, WE Bendixen, et al. Influence of oat (Avena sativa) interseeding on weed suppression in the final year of an alfalfa (Medicago sativa) stand. Weed Technol 1999. 13pp.399-403.
Roncoroni EA, Lanini WT. Influence of grass interseeding on weed suppression in the final year of an alfalfa stand. In Proc. Calif. Weed Conf 1992. Fremont, CA:
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