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All Journal G-Tech : Jurnal Teknologi Terapan
Rifqi Adisonda
Universitas Nahdlatul Ulama Purwokerto, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering

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Pengaruh Agens Hayati Terhadap Insiden Penyakit Bulai pada Jagung Ratna Dwi Hirma Windriyati; Nur Kholida Wulansari; Rifqi Adisonda
G-Tech: Jurnal Teknologi Terapan Vol 8 No 1 (2024): G-Tech, Vol. 8 No. 1 Januari 2024
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/gtech.v8i1.3701

Abstract

Downy mildew control with synthetic fungicides adversely affects it. The use of biological agents is an alternative because it is safer and environmentally friendly. The purpose of the study was to determine the effect of seed treatment using biological agents on corn seed viability, downy mildew and plant growth. Group Randomized Design (RAK) research method with three treatments and repeated 9 times. The treatment is K (without treatment), B (Bacillus subtilis and B. polymixa) and T (Trichoderma hamatum). B and T treatments were able to increase the viability of corn seeds as well as the length of roots and headers. Treatment B was more able to suppress the incidence and intensity of downy mildew compared to control and T. Treatment of the two biological agents was able to increase the number of leaves of corn plants and was not able to increase plant height, stem diameter and plant root weight.
Application of Bacillus spp. and Potassium Fertilizer Against Corn Downy Mildew Disease Ratna Dwi Hirma Windriyati; Rifqi Adisonda
G-Tech: Jurnal Teknologi Terapan Vol 10 No 3 (2026): G-Tech, Vol. 10 No. 3 July 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i3.10422

Abstract

Downy mildew is an important disease in corn cultivation caused by Peronosclerospora spp. There are many different pathogen species such as P. maydis, P. sorghi. Losses reach 50-80% in corn fields. The use of synthetic fungicides has a negative impact because it destroys natural enemies, resulting in pathogen resistance and plant residues. Balanced biological agents and fertilization are solutions to replace chemical fungicides. The aim of this study was to obtain the best dosage of Bacillus sp. and potassium fertilizer to suppress downy mildew and corn growth. The research method used a factorial Randomized Block Design (RBD). The dosage of Bacillus sp. was B0 (0 g), B1 (15 ml), B2 (20 ml). The dosage of potassium fertilizer (KCl) was 3 K0 (0 g/plant), K1 (6 g/plant), K2 (9 g/plant). There were 9 treatment combinations, 3 replications, so there were 27 treatment units. Plant height, number of leaves, temperature, humidity, disease incidence and disease intensity were observed. The treatment of the biological agent Bacillus spp. and the best potassium fertilizers are B1K0, B2K0 and B2K2 which are able to suppress the incidence of corn downy mildew disease, but are not yet able to produce plant height and number of corn leaves.
Co-Authors Nur Kholida Wulansari Ratna Dwi Hirma Windriyati