Abstract: In this paper, the feeding-deterrent and persistent activities of 12.5% Lantana camara  EC and its mixtures with 7.5% rotenone EC, 1.5% pyrethrum EW, or 0.3% azadirachtin EC against Phyllotreta striolata adults were tested. After treated with 1000-fold dilution of 12.5% L. camara EC for 48 h, the antifeedant rate against P. striolata was 40%, and, with increasing concentration of L. camara EC, the antifeedant rate was increased. After treated with 200-, 400-, and 600-fold dilution of 12.5% L. camara EC for 120 h, the antifeedant rate reached to 76%, 68%, and 43%, respectively. A synergistic effect (AFC₅₀=5.25 μg·ml^-1; CTC=213) and an additive or antagonistic effect (CTC=149 or <100) were observed when the 12.5% L. camara EC was mixed with 7.5% rotenone EC in 5∶5, with 1.5% pyrethrum EW in 1∶9, or with 0.3% azadirachtin EC, respectively. 12.5% L. camara EC had strong antifeedant effect against P.striolata, and had good persistent activity after 200- and 400-fold dilution. It could be also used in combination with 7.5% rotenone EC.

Key words: Tropical rainforest, Seedlings, Light, Stomatal characteristics, Plasticity