Insecticidal activities of crude extact of Metarhizium anisopliae and conida suspension against Crocidolomia pavonana fabricius

Effectiveness of Cordyceps sp. and Beauveria Bassiana Against Large Cabbage-heart Caterpillar, Crocidolomia Pavonana Fabricius (Lepidoptera: Crambidae)

“…Several types of oil may help spread the conidia of the fungi on hydrophobic surface such as on insect cuticles [23,24].This results of this research may also the theory of conidia dispersal with the help of certain oils on the body surface of insect larvae. Research on mass production of spore suspensions of B. bassiana and P. fumosoroseus in Malaysia showed that the two fungi with concentration of 1 x 10 8 spores/mL, equivalent to 3.75 x 10 13 spores/ha.…”

“…The results of the field efficacy test indicated that M. anisopliae formula can still live in the field, beside its presence in the field, is still able to control C. pavonana larvae until the 4 th day after application, both pellet formulations and flour formulations [14]. The results of bioassays of the suspension of M. anisopliase in tween 80 showed that from the day 3, M. anisopliase could produces mycotoxins, the amount of mycotoxins production was directly proportional to the growth period of the fungi, and optimal production occurs on day 7, these mycotoxins include myroridins, destruxins, hydroxyfungerins A dan B, metacytophilin, fusarin C, cytochalasins C and D [23]. Destruxin known to be the most abundant most abundant mycotoxins produced by Metharhizium, however, its virulence varies depend on the variety of species Metharhizium [24], Until now, destruxin, a mycotoxins from M. anisopliase is known to have insecticidal activity, destruxin can reduce insect immunity, however, its mode of action is not widely known [25].…”