ESTD PERPUSTAKAAN UNTAD
ESTD PERPUSTAKAAN UNTAD
| JudulPOTENSI CENDAWAN Verticillium Lecanii (Zimm) ISOLAT PALOLO SEBAGAI AGENSIA PENGENDALIAN HAYATI KEPIK PENGHISAP BUAH KAKAO Helopeltis Spp. (HEMIPTERA: MIRIDAE) |
| Nama: NOVA ALVIANITA PANGGALO |
| Tahun: 2020 |
| Abstrak This study aimed to determine influence of Verticillium lecanii of palolo isolates at different suspension baseddilutionsonHelopeltis spp. Percentage mortality, its population density and its intensity of attacks. A preliminary test for designing field experiment was conducted at the Laboratory of Plant Pest and Disease of Tadulako University using four treatments of suspense ondilutions of V. lecanii 10-3,10-5, 10-7, and 10-9 with three replicates.The field experiment was then implemented in cocoa plantation located at Makmur village of Palolo in Central Sulawesi Province of Indonesia. Six plots 15 x 20 m each contained 50 cacao plants where samples were randomly observed based on the presence of Helopeltis spp attack. The suspension dilutions of V. lecanii were applied four times by two week intervals. The results of this study show that the 10-5 suspension dilutions of V. lecanii are effective in causing high Helopeltis spp. mortality ranging from 53.33% to 83.33%. Statistical analysis using t-test showed that the V. lecanii 10-5 suspension treatment in field conditions isvery significant in reducing the population of Helopeltis spp. ranging from only 2.11 adultsplot-1to 5.56 adultsplot-1. It also decreases the intensity of the Helopeltis spp.attacks by less than 25% while the attack in the treatment with no application of V. lecaniivaries from 25% -50%. Key Words: Biological control, Cocoa plantation, Helopeltis spp., and Verticillium lecanii (ZIMM) |