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All Journal JURNAL BUDIDAYA PERTANIAN Jurnal Agrosilvopasture-Tech
Siahaya, Victor G
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Agriculture, Biological Sciences & Forestry

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Journal : Jurnal Agrosilvopasture-Tech

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Kepadatan Populasi dan Intensitas Kerusakan Sexava coriacea L. pada Tanaman Kelapa di Halmahera Barat - Maluku Utara Mosu, Kristofel R; Siahaya, Victor G; Masauna, Esther D
Jurnal Agrosilvopasture-Tech Vol 2 No 2 (2023): Jurnal Agrosilvopasture-Tech
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/j.agrosilvopasture-tech.2023.2.2.338

Abstract

The purpose of the study was to obtain dense data on the population of Sexava coriacea pests and the amount of damage intensity to coconut plants in West Halmahera, North Maluku. The method used is a survey and interview of farmers, where the sample villages are determined proportionally to the villages with the highest number of coconuts. Determining the level of population density begins by determining each of the two leaf sheaths facing west and east. Counting insects (imago or nymphs) found on predetermined fronds as many as 600 fronds. The extent of damage was obtained by taking five leaf sheaths, for a total of 750 leaf sheaths. The results showed that the insect pest found was Sexava coriacea L. The average dense population of S. coriacea in Kie Ici village ranged from 18-77 nymphs per tree, a total of 325 heads, an average of 1.63 heads per midrib of coconut leaves, Naga village ranged from 4-36 nymphs per tree, a total of 275 heads, an average of 1.38 heads per midrib of coconut leaves, Maritango village ranges from 10-34 nymphs per tree, a total of 200, an average of 1.00 per midrib of coconut leaves. The average percentage of attacks and damage rate in Maritango village was 32.4% (medium), Naga village 42.8% (medium), and Kie Ici village 48.4% (medium). Natural enemies found in the field are spiders (Arachnida), weaver ants (Oecophylla smaragdina), and suuku birds (Centropus goliath Bonaparte).
Efektivitas Esktrak Akar Kenikir (Cosmos caudatus Kunth) dan Pepaya (Carica papaya L) dalam Menekan Terbentuknya Puru Akar Nematoda pada Tanaman Seledri (Apium graveolensL) Asty, Nur; Siahaya, Victor G; Umasangaji, Aminudin
Jurnal Agrosilvopasture-Tech Vol 2 No 2 (2023): Jurnal Agrosilvopasture-Tech
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/j.agrosilvopasture-tech.2023.2.2.354

Abstract

This study aims to test the effectiveness of root extracts of kenikir and papaya plants in suppressing the rate of root-knots formation, as well as the number of root-knots formed on celery plants. The method used was a factorial experiment in a randomized block design with two factors, namely the type of antagonist plant root and the dosage, with five replications. The results showed that the treatment of papaya root extract (Carica papaya L.) had a significant effect on all parameters, but the HSD test was only significantly different on the number of root knots. The highest average number of root knots in control plants was 67.2 (A1B0), and the lowest was 4.6 (A1B5). The treatment of kenikir root extract (Cosmos caudatus Kunth.) significantly affected all parameters, but the HSD test was only significantly different on plant height and number of root knots. The average plant height in the control was 31.4 cm (A2B0), and in the treatment 40.6 cm (A2B5). The highest average number of root knoots was 50.8 (A2B0), and the lowest was 1.0 (A2B5). Carpain secondary metabolites in papaya root extract, and phenylpropanoids in kenikir root extract played a role in suppressing the growth of root-knot nematodes. Coniferyl alcohol in kenikir root extract is thought to play a role in increasing the height of celery plants. Kenikir root extract was better than papaya root extract in suppressing the growth of root-knot nematodes.
Co-Authors Asty, Nur Masauna, Esther D Mosu, Kristofel R Umasangaji, Aminudin