Ginting, Cipta and Prasetyo, Joko and Dirmawati, Suskandini R. and ivayani, ivayani and Timotiwu, P.B. and Maryono, Tri (2020) Identification of Maize Downy Mildew Pathogen in Lampung and the Effects of Varieties and Metalaxyl on Disease Incidence. [Experiment] (Submitted)

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Abstract

Maize downy mildew (MDM) is concidered as a major problem in all maize growing areas in Indonesia including the Province of Lampung. The objectives of this study were (i) to identify the species of Peronosclerospora causing maize downy mildew (MDM) in Lampung, (ii) to determine the influence of varieties on the intensity of downy mildew and (iii) to determine the efficacy of metalaxyl to control MDM on some maize varieties. To identify Peronosclerospora causing MDM, the pathogens were observed under light microscope and scanning electrom microscope. Maize varieties response against pathogens and efficacy metalaxyl were researched in the field with the test plants exposed to plants showing MDM symptoms as the sources of inocula to mimic natural conditions. Three species of Peronosclerospora were found, i.e. P. sorghi, P. maydis, and P. philippinensis. P. sorghi, P. maydis, and P. philippinensis. However, the presence of the Peronosclerospora species reported here is tentative pending further studies with molecular techniques. On both varieties Pioneer 27 (P-27) and NK-22, AUDPC on F1 plants was greater than that on F2 plants. On P-27, the production of F2 was higher that that of F1 plants, but there is no significant difference in production between F1 and F2 of NK-22 variety. Seed treatment using metalaxyl was not effective to control downy mildew of maize.

Item Type: Experiment
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian (FP) > Prodi Proteksi Tanaman
Depositing User: Prof Cipta Ginting
Date Deposited: 30 May 2020 12:52
Last Modified: 30 May 2020 12:52
URI: http://repository.lppm.unila.ac.id/id/eprint/21183

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