Volume 15, Issue 9 · IJARST · ISSN 2319-1783 / 2320-1126

The Effect of Fungicide Addition and Application Methods on The Intensity of Downy Mildew in Maize

The Effect of Fungicide Addition and Application Methods on The Intensity of Downy Mildew in Maize is an open-access, peer-reviewed research paper by Nawang Anjarwati, A’isyah Surya Bintang, Florentina Kusmiyati, Chaieydha Noer Afiefah, and Fatimatuzzahratul Ghifari, published in Volume 15, Issue 9 of the International Journal of Advanced Research in Science and Technology (IJARST), a UGC-approved journal (Print ISSN 2319-1783, Online ISSN 2320-1126).

Author

Nawang Anjarwati, A’isyah Surya Bintang, Florentina Kusmiyati, Chaieydha Noer Afiefah, and Fatimatuzzahratul Ghifari

Abstract

Downy mildew is a disease with high potential for loss in maize, the most widely applied control method is the use of metalaxyl fungicide as seed treatment. However, pathogen resistance was found, so alternative controls are needed. This study aims to examine the effect of adding different active ingredients and fungicide application methods and their interactions on controlling downy mildew in maize. The study used 5x3 Randomized Block Design (RBD). The first factor was the type of active ingredient consisting of 5 treatment levels, namely F0 (Control), F1 (Metalaxyl), F2 (Dimethomorph), F3 (Chlorothalonil + Oxathiopripolin), and F4 (Phenamidone). The second factor was the fungicide application consisting of 3 treatment levels, namely A1 (seed treatment), A2 (spraying), and A3 (seed treatment + spraying). The parameters observed were the incubation period, incidence, intensity, infection rate, AUDPC, chlorophyll at 3 and 5 WAP, plant height, number of leaves, fresh weight, and dry weight. The results of the study showed that the incubation period occurred on average at 20.49 - 22.98 DAI with disease incidence reaching 100% and intensity reaching 28.3 - 40%. AUDPC value of 80.15 - 106.7 is included in the resistant-moderately resistant category with the highest infection rate at 4 WAI ranging from 0.40 to 0.92 plants/week and decreasing to 6 WAI. The conclusion is that the treatment of active ingredients and application methods can used to control downy mildew in Paramita F1 by reducing the rate of infection supported by plant resistance which is categorized as resistant to somewhat resistant.

Keywords: Active ingredient, Downy mildew, Fungicide, Maize

DOI: https://doi.org/10.62226/ijarst20262825

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DOI

10.62226/ijarst20262825

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Nawang Anjarwati, A’isyah Surya Bintang, Florentina Kusmiyati, Chaieydha Noer Afiefah, and Fatimatuzzahratul Ghifari — “The Effect of Fungicide Addition and Application Methods on The Intensity of Downy Mildew in Maize.” International Journal of Advanced Research in Science and Technology (IJARST), Volume 15, Issue 9. DOI: 10.62226/ijarst20262825.

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