Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal Bioma : Berkala Ilmiah Biologi Biosaintifika: Journal of Biology & Biology Education Tropical Plantation Journal
Budihardjo, Kadarwati
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Education

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
A Study on Barn Owl Population (Tyto alba var. javanica) in Reducing Rat Attacks and Parthenocarpy in Oil Palm Fresh Fruit Bunches Budihardjo, Kadarwati; Wirianata, Herry; Primananda, Septa
Bioma : Berkala Ilmiah Biologi Vol. 21, No 2, Tahun 2019
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (529.548 KB) | DOI: 10.14710/bioma.21.2.100-105

Abstract

In mature oil palms, rat attacks fruit bunches, causing significantly reduction in the potential yield and the quality of oil palm fruit bunches. Rat is also known to consume the post anthesis male flowers which act as the breeding sites for the eggs and larvae of Elaeidobius kamerunicus pollinator beetle. Indirectly, the pollinator beetle population can be reduced in high rat infestation area, affecting the pollination and increasing the percentage of parthenocarpic fruit bunches. The barn owl (Tyto alba var. javanica) is a rat biological control agent in the oil palm plantations. The study conducted at PT. Mustika Sembuluh in Central Borneo shows that barn owl (T. alba) population is significantly correlated with both rat attacks and parthenocarpic percentage of oil palm fruit bunches in oil palm plantation
Indigenous Trichoderma harzianum as Biocontrol toward Blight Late Disease and Biomodulator in Potato Plant Productivity Purwantisari, Susiana; Sitepu, Harum; Rukmi, Isworo; Lunggani, Arina Tri; Budihardjo, Kadarwati
Biosaintifika: Journal of Biology & Biology Education Vol 13, No 1 (2021): April 2021
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v13i1.26706

Abstract

Indigenous Trichoderma has widely used in late-blight epidemic areas in Magelang, Indonesia as biocontrol and biomodulator. But it application still lacks of scientific proof, even though it is potently to be developed. Therefore, this study aims to identify and evaluate indigenous Trichoderma application in eradicating late blight and increase productivity. This research was an experimental posttest-only using six experimental plots, with P0 plot with no treatment. The solution was made by dissolve indigenous Trichoderma solid-starter into water (m/v), then used for treatment. The treatment plots including: two groups of sprayed-only plots with doses of 100 g/ 10 L of solution for P1 and 150 g/ 10 L of solution for P2; and two group treated with sprayed-poured method using doses of 100 g/ 10 L of solution for P3 and 150 g/ 10 L of solution for P4. The positive control group was P5 group, treated using chemical pesticides and tuber booster. The microscopic identification revealed that the local bioagent was Trichoderma harzianum species. Application of T. harzianum in P4 was significantly increased the productivity. However, it was not effective in increasing growth, but able to reduce the intensity of late blight disease. The research revealed that native Trichoderma is able to be used as anti-infectious agent and potentially improve the quality of potato plants. In the future, this research may worthwhile for farmers to develop and produce trustworthy and proven Trichoderma-based biocontrol and help them increase the potato production economically.
The Effectiveness of Progressive Pruning on Looses Production Nugraha, Bima Sakti Novi Tri; Wirianata, Herry; Budihardjo, Kadarwati
Tropical Plantation Journal Vol 4, No 2 (2025): TROPICAL PLANTATION JOURNAL
Publisher : Akademi Komunitas Perkebunan Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56125/tpj.v4i2.64

Abstract

Oil palm canopy is formed every month as many as 1-3 fruits, depending on the age and growth of the plant. Each oil palm canopy supports the formation of leaf/frond positions that are arranged in a spiral. Progressive pruning of the main shoots is carried out directly by harvest workers (not the Special Main Shoot Work Team) and is carried out simultaneously when cutting the fruit while still referring to the basic principle of the number of productive fronds that must still be maintained according to the provisions (leaf area index). This study aims to determine the role of the progressive pruning system in minimizing looses (bunches and looses fruit) in oil palm plantations. The basic method used in this study is a quantitative descriptive method using t-test analysis, the parameters used are the looses of bunches and looses fruit. The conclusion of the study is that the progressive pruning system can reduce losses of oil palm fruit (bunches) and loose fruit, compared to the periodic pruning system at the overall looses point of the three looses point chains, namely at the main, plate and market.
Co-Authors Arina Tri Lunggani MG Isworo Rukmi Nugraha, Bima Sakti Novi Tri Primananda, Septa Sitepu, Harum Susiana Purwantisari Wirianata, Herry Wirianata, Herry