Weed extracts as potential biopesticides against Cabbage black rot in an upland of Southern Philippines

Abstract

In vivo and in vitro experiments were conducted to evaluate different plant parts of Solanum biflorum Lour. in combination with Lantana camara Linn. as biopesticide against black rot of cabbage. There were nine treatments replicated three times. The least disease severity rating was consistently observed in T4 (fruits of S. biflorum + leaves of L. camara) which was comparable to T1 (Kocide) at 14, 21 and 28 Days After Treatment (DAT). Highly significant variation was observed among means on the number of harvested heads, weight of cabbage and adjusted yield per hectare. Furthermore, T1 (Kocide) and T4 (fruits of S. biflorum + L. camara leaves) had the most number of harvested heads comparable to T6 (roots of S. biflorum + leaves of L. camara). On the adjusted yield per hectare, T1 (Kocide) had the highest yield of 16,800 kg/ha which differed significantly from the other treatments. Among the extracts, T4 (fruits of S. biflorum + leaves of L. camara had the highest mean of 9,600 kg/ha comparable to T6 (roots of S. biflorum) with 9,200 kg/ha. Based on the results, the fruits of S. biflorum and L. camara leaves proved effective in the control of black rot of cabbage.