No abstract

Corn is an important food crop in the world. Downy mildew as a corn main disease causes a decrease of crop yields. Downy mildew can be prevented by seed treatment. The study aims to determine the effect of washing and adding fungicides on seeds to downy mildew attack, growth, and hybrid corn yields. The research conducted in Wedomartani Experimental Field, Ngemplak, Sleman with experiment in June – October 2018. Field experiment with Randomized Complete Block Design (RCBD) was set up, using single factor, which is seeds of P27 variety washed and added fungicides. There are 10 treatments: control, washed seeds, washed seeds + fungicide metalaxyl 3g/kg + dimetomorph 2g/kg, washed seeds + fungicide metalaxyl 3g/kg + dimetomorph 3g/kg, washed seeds + fungicide metalaxyl 3g/kg + dimetomorph 4g/kg, washed seeds + fungicide metalaxyl 3g/kg + dimetomorph 5g/kg, washed seeds + fungicide metalaxyl 5g/kg + dimetomorph 2g/kg, washed seeds + fungicide metalaxyl 5g/kg + dimetomorph 3g/kg, washed seeds + fungicide metalaxyl 5g/kg + dimetomorph 4g/kg, washed seeds + fungicide metalaxyl 5g/kg + dimetomorph 5g/kg. The results showed that control effective to prevent downy mildew attack, increasing growth and hybrid corn yields. Washed seeds cause high level of downy mildew attack, slow growth, and low crop yields. Seed treatments with fungicides is not effective, because give same affect with control.

Water apple citra is a local fruit that contains a complete mineral. Production of water apple citra can be increased through vegetative propagation, one of them is cuttings. The growth of cuttings can be stimulated using plant growth regulators and growing medium. This study aims to determine the effect of plant growth regulators type and growing medium as well as the interaction between these factors. The research was conducted on March until May 2016 at the garden experiment, Faculty of Agriculture, UPN “Veteran” Yogyakarta. This research used Randomize Completely Block Design (RCBD) factorial pattern with three replications. There were two factors studied, the first factor was the type of plant growth regulators consist of root-up, rootone–F, atonic and without plant growth regulatos, the second factor was growing medium consist of the river sand, floral foam, and river sand+compost. The observed data were analyzed by analysis of variance (ANOVA) and continued by DMRT at 5% real level. The results showed that rootone-F could increase percentage of cutting life and root length. Growing medium of river sand+compost could increase percentage of cutting life. There were an interaction due to the combination of treatment on the observation variable such as root length and root volume.was analyzed by using Duncan Multiple Range Test (DMRT) at 5% level. The result showed that there were an interaction between liquid organic fertilizer various and Trichoderma sp. on the plant height at 42 days (the days after planting), the leaves number at 42 days (the days after planting), the root lenght, the roots number, and the crop weight of red cabbage. The treatment combination of cow urine and Trichoderma sp. gave the best crop weight compared to other treatments. There was no significant effect on vitamin C and vitamin A content in the red cabbage.Keyword: water apple citra, plant growth regulators, growing medium

The study aims to determine the effect of planting distance and types of manure on the growth and biomass of Indigofera plants. The study was conducted in practice garden of Faculty of Agriculture UPN “Veteran” Yogyakarta, is a field experiment using a Complete Randomized Group Design consisting of J1: planting distance 1 m x 1 m ; J2: 1 m x 1,25 m ; J3: 1 m x 1,5 m ; J4: 1 m x 1,75 m. The second factor is types of manure, which consist of: M1: cow manure dosage 20 t/ha; M2: goat manure dosage 20 t/ha. The study result shows that there is no interaction between planting distance and types of manure toward growth and biomass yield of Indigofera plant. The planting distance treatment of 1 m x 1 m (J1) and planting distance of 1 m x 1,5 m (J3) gives insignificant influence on all parameters observed at 9 weeks observation after planting. The manure types treatment gives insignificant difference on all observed parameters.Keyword: planting distance, manure, indigofera

The aim of this research was to know the effect of granular organic fertilizer enriched with boiler ash and neem leaves powder on productivity and pest resistance of three red onion cultivars (Allium ascalonicum L.). The research was conducted in coastel sandy soils in Srigading village, Sanden, Bantul, DIY, from June to August 2017. The experiment was arranged in a Completly Randomized Block Design with two factors. The first factor was the doses of granular organic fertilizer (20 ton/ha, 30 ton/ha and 40 ton/ha) and anorganic fertilizer as control. The second factor was red onion cultivars (Super Biru, Crok Kuning and Tiron). Parameters observed included plant height, number of bulblets, number of leaves, pest population, damage intensity, number of bulbs, fresh weight of bulbs, fresh weight of bulbs per plot, economical weight of dried bulbs per plot and economical weight of dried bulbs per hectare. The data were subjected to Anova and followed by Duncan’s Multiple Range Test at 5%. The results showed interaction between red onion cultivars and granular organic fertilizer significantly increased the number of bulblets, number of bulbs, fresh weight of bulbs, fresh weight of bulbs per plot, economical weight of dried bulbs per plot and economical weight of dried bulbs per hectare. The pest founded in this research was Spodoptera exigua. Pest population and damage intensity were not significantly effected by red onion cultivars and granular organic fertilizer treatment. The result showed the application of 40 ton/ha on Crok Kuning cultivar and Tiron cultivar resulted in the highest red onion production.Keywords: granular organik fertilizer, red onion, pest