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 s...

Pollen pistil interaction studies were carried out in six sunnhemp genotypes. viability percentage of the genotypes ranged from 0.0 to 93.5% and pollen germination 84.0% at four different floral stages starting bud opening a flower. The viable grains present later three flower for globose type anthers, while two heart shaped anthers. Stigma receptivity was high very during S3 S4 stages. Artific...

O presente trabalho baseia-se na hipótese de que o cultivo diferentes coberturas vegetais poderia suprimir banco sementes plantas daninhas, além melhorar as condições do solo e incrementar a produtividade. objetivo deste foi avaliar daninhas com vegetais. delineamento experimental utilizado em blocos casualizados nove tratamentos quatro repetições. Os foram constituídos pelas vegetais: crotalár...

While mixed-species cover crops are gaining worldwide popularity, their utility in the ‘plough-out’ period tropical sugar cane systems has not been investigated. Field trials investigating weed suppression (one season only), biomass production and nitrogen accumulation of single-species were conducted over two seasons on a commercial sugarcane farm Australian tropics. Mixed-species showed stron...

The host suitability of five of the most common weed species occurring in maize (Zea mays L.) fields in South Africa to Pratylenchus zeae was tested. Based on the number of nematodes per root unit, mealie crotalaria (Crotalaria sphaerocarpa) was a good host; goose grass (Eleusine indica), common pigweed (Amaranthus hybridus), and thorn apple (Datura stramonium) were moderate hosts; and khaki we...