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Allelopathic Potential of Winter Cereal Cover Crop Mulches on Grass Weed Suppression and Sugarbeet Development

^a Agron. Lab., Technol. and Educ. Inst. of Thessaloniki, 541 01 Thessaloniki, Greece
^b Weed Science Lab., Technol. and Educ. Inst. of Larissa, 411 10 Larissa, Greece
^c Agron. Lab., School of Agric., Aristotle Univ. of Thessaloniki, 541 24 Thessaloniki, Greece
^d Agron. Dep., Univ. Farm, Aristotle Univ. of Thessaloniki, 570 01 Thermi, Greece

View larger version (19K): [in a new window]   Fig. 1. Total monthly rainfall and mean monthly temperature during the experiment.

View larger version (14K): [in a new window]   Fig. 2. Inhibitory effect (% of water control) of the cover crop species on germination and root length of sugarbeet and large crabgrass. Columns within each graph with different letters indicate significant difference at P < 0.05.

View larger version (18K): [in a new window]   Fig. 3. Inhibitory effect of cover crop species on shoot number and fresh weight of barnyardgrass. Columns within each graph and each sampling with different letters indicate significant difference at P < 0.05. WAP = weeks after planting.

View larger version (18K): [in a new window]   Fig. 4. Inhibitory effect of cover crop species on shoot number and fresh weight of bristly foxtail. Columns within each graph and each sampling with different letters indicate significant difference at P < 0.05. WAP = weeks after planting.

View larger version (17K): [in a new window]   Fig. 5. Inhibitory effect of cover crop species on shoot number and fresh weight of large crabgrass. Columns within each graph and each sampling with different letters indicate significant difference at P < 0.05. WAP = weeks after planting.

View larger version (32K): [in a new window]   Fig. 6. Effect of 11 winter cereal cover crop mulches and three grasses (barnyardgrass, bristly foxtail, and large crabgrass) on sugarbeet yield. BAth = Athinaida barley; BThe = Thessaloniki barley; RAlb = rye Albania; RGre = rye Greece, RGer = rye Germany; TNio = Niovi triticale; TThi = Thisvi triticale; TVro = Vronti triticale; TVri = Vrito triticale, TArt = Artemis triticale, TCat = Catria triticale.

View larger version (19K): [in a new window]   Fig. 7. Inhibitory effect of cover crop species on sugarbeet yield. Columns within each graph with different letters indicate significant difference at P < 0.05.