Variety and Seeding Time Influence on Flowering Characteristics and Trichodesmine Content in Sunn Hemp (Crotalaria juncea L.)

Background: Sunn hemp (Crotalaria juncea L.) is an important annual legume used as green manure. It contains pyrrolizidine alkaloids, which are apparently effective in suppressing nematodes. pertinent to know the growth stage during alkaloid concentrations become higher. Methods: The period of days necessary for flowering, pod and one pods at different stages five sunn cultivars with May July seeding were investigated. Result: Findings indicated that flowering two occurred later than others, especially seeding. grew 20 mm length 6-11 from flowering. Then maximum size (40 length) only few days. A main seed, trichodesmine, increases grow; then it considerably mature. However, matured hull similar values whole immature pod. These results demonstrate both day-neutral short-day shorten first flower indicate cutting after 10 increasing concentration.