Inhibition of Velvetleaf (Abutilon theophrasti) Germination and Growth by Benzyl Isothiocyanate, a Natural Toxicant!
نویسندگان
چکیده
/ Abstract. Benzyl isothiocyanate (BITC) was extracted from mature papaya (Carica papaya L.) seeds and applied to imbibed velvetleaf (Abutilon theophrasti Medic. #3 ABUTH) seeds. Complete inhibition of germination occurred at a concentration of 6 x l(f4 M BITC, and only 28% (compared to controls) of the seeds germinated after 4 days exposure to the 4 x l(f4 M treatment. Corn (Zea mays L. 'DeKalb XL-66') was unaffected even at higher concentrations; however, 72% of imbibed soybeans [Glycine max (L.) Merr. 'Tiger'] germinated in 6 X l(f4 M BITC. When this natural inhibitor was applied to etiolated velvetleaf seedlings at 4 x 1(f4 M, 100% died in 2 days. Additional index words. Carica papaya, phytotoxin, germination inhibitor, ABUTH.
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