Preliminary Trial of 11 New Hybrid Maize Genotype to The Resistance on Java Downy Mildew (Peronosclerospora maydis)

Abstract

Abstract-Maize or corn (Zea mays L.) belongs to the family of grasses (Poaceae).Maize is grown globally and one of the most important cereal crop in the world. In many countries, corn is the main agricultural crop, and are used as food, feed and industrial raw materials. Together with rice and wheat, corn included in the cereals that provide about 65% carbohydrates and 50% protein that humans need. For this purpose, many developing countries, especially in Asia and Africa are in a strong effort to increase their corn yields through the use of better seeds. Although in Indonesia, corn is the second important food crop after rice, however, with the rapid growth of the livestock industry, corn is a major component (60%) in feed ingredient. It is estimated that more than 55% of the corn used for feed in Indonesia. Java Downy Mildew (Peronosclerospora maydis) is the main disease that is concerned by maize corn growers. This disease often resulting in substantial losses for farmers, even reach 100% in susceptible genotypes. Therefore screening trial on 11 new prospective hybrids was conducted with the expectation that these new cultivars can be classified in the criteria "less resistant or higher" according to the criteria of modified Reid. Of the 11 new hybrid cultivars, 3 new hybrids (27.3%) classified in the criteria "very resistant", 4 new hybrids (36.4%) classified in the criteria "resistant", 2 new hybrid (18.2%) classified in the criteria "less resistant", and 2 other new hybrids (18.2%) classified in the criteria "less susceptible".

Growth Performance and AMMI Yield Stability Analysis of Five New Maize Hybrid Populations

“…The second application of urea was done at 30 days after planting at a rate of 150 kg ha -1 . The dose of urea used was an optimum level for growth and yield of maize hybrid variety for natural non-acidic soil [17].…”

Evaluation of Manure Types in Improving the Performances of New Maize Hybrids in Coastal Land

“…Fertilizer of urea, TSP, and KCl at the rate of 150 kg ha -1 , 100 kg ha -1 , and 50 kg ha -1 , respectively, were sidedressed after the seeds were sown. The rate of urea was a half of the optimum dozes for the growth of maize hybrid variety for natural non-acidic soil [20]. Reseeding was conducted at seven days after planting to replace nongerminating seeds.…”

Potensi Fungisida Perlakuan Benih terhadap Perenosclerospora sp. penyebab Penyakit Bulai Jagung

“…Hikmahwati et al (2019) mengatakan bahwa gejala serangan bulai jagung mampu mengakibatkan tanaman jagung tumbuh kerdil, klorosis atau kehilangan zat hijau daun yang pada akhirnya mengakibatkan kematian sebelum jagung dapat berproduksi. Hal tersebut selaras dengan pernyataan (Setyawan et al, 2016) bahwa penyakit ini dapat mengakibatkan kegagalan panen jagung hingga 100 %, bahkan serangan bulai ini sudah menyebar hingga ke seluruh pelosok Indonesia hingga dunia khususnya pada jagung lokal yang rentan terhadap penyakit tersebut.…”