POPULASI DAN PERSENTASE SERANGAN LARVA Spodoptera exigua Hubner PADA TANAMAN BAWANG DAUN DAN BAWANG MERAH DI DESA AMPRENG KECAMATAN LANGOWAN BARAT

Abstract

ABSTRACK
This research aims at indentifying the ratio of the population and the percentage of Larva.
attack on leeks and shallot plant. This research was taken in Ampreng Village, Langowan
subdistrict, Minahasa Regency. This research had been taking for two month, i.e. that is
March to April 2016 . The research was taken by using the survey method on leeks and
shallot plants in Ampreng village, Langowan subdistrict. The researcher had used the
diagonally slicing method i.e determining 5 sub plots on the location of taking the sample.
Taking the sample had been done by using the interval of time along one week for three times
of observation. The finding of the research showed the average of the highest population of
Larva S. exigua went to Shallots i.e 1.44 tails, meanwhile the population of Larva on leeks
only got 0,67 tail. The highest average of Larva S. exigua attack went to Shallots plants, i.e.
28,07 %, meanwhile leek plant only 14,81 %. The result of the independent analysis test
“sample T-test†showed there are found the real differences of the population and the
percentage of Larva S. exigua attack on leeks and shallot plants.
Kata kunci : Population, Percentage, Leek, Shallot, S. exigua