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All Journal Jurnal Sumberdaya Hayati Jurnal Entomologi Indonesia
Okky Setyawati Dharmaputra
Institut Pertanian Bogor SEAMEO BIOTROP
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Keanekaragaman serangga hama pala (Myristica fragrans) dan tingkat kerusakannya di penyimpanan Dharmaputra, Okky Setyawati; Sunjaya, Sunjaya; Retnowati, Ina; Nurfadila, Nijma
Jurnal Entomologi Indonesia Vol 15 No 2 (2018): July
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5994/jei.15.2.51

Abstract

Pest attack in nutmeg is a cause of major damage both in the field and in storage. Information on the diversity of pest insects in storage, harvesting methods, and good drying needs to be known to reduce the level of damage to nutmeg. This study aims to determine the diversity of insect pests and the percentage of nutmeg damage due to various postharvest treatments. Nutmeg was packed in jute bag and stored for four months under warehouse conditions. Each jute bag containing nutmeg is treated based on the origin of nutmeg (picked from a tree or picked up on the ground), drying method (sunshine or fogging), and shell or without shells with each treatment replicated three times. Sampling of numtag was conducted after four month to calculate the number of each insect species found, determine the insect population, and determine the percentage of damaged seeds. Four insect species were found in nutmeg kernels in almost various treatments. They were Araecerus fasciculatus ((Degeer) (Coleoptera: Anthribidae), Carpophilus dimidiatus (Fabricius) (Coleoptera: Nitidulidae), Oryzaephilus surinamensis (Linnaeus) (Coleoptera: Silvanidae), and Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae). The dominant species was A. fasciculatus. The percentage of damaged kernels derived from nutmeg kernels fallen on the ground, dried either using sun-drying or smoke-drying, either in-shell or without shell, were higher than the kernels derived from ripe fruitswith various treatments. The recommendation of this research result is good postharvest handling of  nutmeg to prevent insect infestation should be conducted by collecting nutmeg derived from ripe fruits picked from the trees, nutmeg in-shell either sun-dried or smoke-dried, and storing nutmeg in-shell.
Produksi Jamur Merang (Volvariella volvacea (Bull. ex. Fr) Sing). pada Dua Jenis Limbah Kapas: Production of Straw Mushrooms (Volvariella volvacea (Bull. ex. Fr) Sing). on Two Types of Cotton Wastes Sudirman, Lisdar Idwan; Rosita, Iros; Dharmaputra, Okky Setyawati
Jurnal Sumberdaya Hayati Vol. 10 No. 4 (2024): 2024
Publisher : Departemen Biologi, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsdh.10.4.229-237

Abstract

One of the substrates for the growth of straw mushrooms is cotton waste. Based on the cellulose content, trash cotton and dust cotton were selected as substrates. This research was conducted twice at the dry season. The 3,000 g production substrates were a mixture of trash cotton and straw in a ratio of 2:1 (T2J1) and 1:1 (T1J1), dust cotton and straw in a ratio of 2:1 (D2J1) and 1:1 (D1J1). Previously, cotton and straw with the addition of 8% rice bran and 3% lime were composted separately, then mixed, pasteurized and inoculated with 2.5% of spawn. The D2J1 substrate produced higher number and bigger of fruit bodies, with the biological efficiency (BE) of 21.22 and 23.03% for the first and the second experiments, while the BE of T1J1 were only 16.76% and 5.84% and those of D1J1 were 15.63% and 12.45%, those of T2J1 were 16.76% and 0.22% for the first and second experiment respectively. The lowest BE value in these experiments due to incomplete vegetative phase, along with the contamination of Trichoderma sp. In conclusion, the production of straw mushroom fruiting bodies depends on the type of cotton and its ratio to straw.
Co-Authors Ina Retnowati Lisdar Idwan Sudirman Nijma Nurfadila, Nijma Rosita, Iros Sunjaya Sunjaya