Allelopathic Potential of Hope White Lupine (<i>Lupinus albus</i>) Herbage and Herbage Extracts

TL;DRAbstract

The allelopathic potentials of Hope white lupine ( Lupinus albus L.) herbage and herbage extracts were evaluated. The emergence and growth of cotton ( Gossypium hirsutum L. ‘Deltapine 45A’), soybean [ Glycine max (L.) Merr. ‘Lee 68′], and six weed species under greenhouse conditions were measured after seeding directly into a moist, silt loam soil into which dry Hope lupine herbage, collected at second bloom, had been incorporated at rates from 500 to 8000 ppm (dry herbage/dry soil, w/w). At the lower rates, incorporated Hope white lupine stimulated the emergence of large crabgrass [ Digitaria sanguinalis (L.) Scop.]; at the higher rates, cotton emergence was inhibited. Cotton and soybean fresh weights were stimulated at incorporation rates up to 2000 ppm, but were inhibited at higher concentrations. The growth of johnsongrass [ Sorghum halepense (L.) Pers.] and large crabgrass was stimulated at most incorporation rates. Stimulated plants were chlorotic and had longer internodes. Emerg

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