KAJIAN BIOAKTIVITAS FORMULASI AKAR WANGI DAN SEREH WANGI TERHADAP HAMA BUBUK JAGUNG SITOPHILUS SPP. PADA PENYIMPANAN BENIH JAGUNG

Abstract

Seed storage is the important part of quality seed production attempts and it is hoped will keep seed quality for such periode in storage. Biotic factor which hugely role in damage and decrease of quality seed corn for storaging is post-harvest pests, espescially corn weevil Sitophilus spp. The study was aimed to know the effects of some formulations and doses of fragrant root and citronella grass to corn weevil Sitophilus spp. and the corn seed in storage. Fragrant root and citronella grass at doses 5-20% in solution (extract) formulation had contact and feed toxicity to corn weevil Sitophilus spp., otherwise in powder and original (non extract) formulation just had feed toxicity. Fragrant root and citronella grass at doses 5-20% in various formulation could depress the population of Sitophilus spp., but the fragrant root caused higher mortality than the citrobella grass, and at the dose 20% could give highest mortality than the 5% and 10%. Application of fragrant root and citronella grass at doses 5-20% in all of the formulations (original, solution and powder) could decrease the lost weight of corn seed, but did not influence the growth potential of corn seed. Key words : corn seed, Sitophilus spp., fragrant root, citronella grass