scholarly journals PERKEMBANGAN Spodoptera frugiperda J.E Smith PADA TANAMAN JAGUNG MANIS (Zea mays L. Saccharata)

2021 ◽  
Vol 6 (2) ◽  
pp. 104
Author(s):  
Wilyus Wilyus ◽  
Hamdan Maruli Siregar ◽  
Rizki Aulia
Keyword(s):  
Spodoptera Frugiperda ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Population Development ◽  
Corn Plant ◽  
Plant Parts ◽  
Plant Pests ◽  
Corn Plants ◽  
The Right ◽  
The Relationship

This study was conducted to determine the relationship between sweet corn plant phenology and population development and the attack of Spodoptera frugiperda. The research was carried out at the Research Farm and at the Laboratory of Plant Pests, Faculty of Agriculture, Jambi University. The study was conducted on an area of 500 m2 containing 28 plant plots. The sample plants consisted of 4 plots determined systematically. In each sample plot, all plants were used as sample.  plants to calculate the percentage of attacked plants, and the percentage of attacked cobs. S. frugiperda population observations were carried out directly on leaves, stems, flowers and cobs. If there were S. frugiperda faeces on the shoots, stems, and cobs, destructive observations were made where the plant parts were opened, to determine the presence of S. frugiperda in them. The data obtained were tabulated and arranged in the form of tables and figures, then explained descriptively. The results showed that: the population of S. frugiperda in each growth phase continued to increase, the highest population of S. frugiperda was found in the R6 phase or in the physiological ripening phase, which was as many as 21 heads per 12 corn plants; the percentage of attacks of S. frugiperda in each phase continues to increase, the highest percentage of attacks is in phase R6, which is 78.72%;  the attack of S. frugiperda on cobs began to be seen in the R2-R5 phase and was highest in the R6 phase, which was 68.57%. It is necessary to find the right way to control S. frugiferda.

Relationships Between Yield and Crown Disease of Sweet Corn Grown in the Willamette Valley of Oregon

2009 ◽  
Vol 10 (1) ◽  
pp. 9
Author(s):  
Nathan L. Miller ◽  
Cynthia M. Ocamb
Keyword(s):  
Zea Mays ◽  
Image Analysis ◽  
Regression Analysis ◽  
Root Rot ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Analysis Program ◽  
Willamette Valley ◽  
Nodal Roots ◽  
Corn Plants

Sweet corn (Zea mays L.) yields in the Willamette Valley of Oregon declined during the 1990s. Severe root rot affected some plants shortly before harvest, but was absent in other plants that showed secondary symptoms of reduced ear yield and leaf death; necrosis of stalk nodes and crown tissues was found instead. Studies were done to determine if there is a relationship among yield and necrosis of crowns, stalk nodes, nodal roots, radicles, or sub-crown internodes. An image analysis program was used to quantify the grayscale value of crown and node tissues. Regression analysis indicates that plants with darker crown tissues have lower ear weights. Rots of the nodal roots, radicle, or sub-crown internode were poor predictors of ear weight at harvest. When either Fusarium oxysporum or F. verticillioides were isolated from crowns of commercial sweet corn plants, these crowns had significantly darker grayscale values than those from which neither species was isolated; ear weights were also lower when F. oxysporum was isolated from the crown or a stalk node. Accepted for publication 13 July 2009. Published 31 August 2009.

scholarly journals Potassium Silicate, Against Water Stress, in Sweet Corn Plant Growth Traits

2019 ◽  
Vol 11 (5) ◽  
pp. 172
Author(s):  
Ausbie Luis Graça Araújo ◽  
Amanda Maria de Almeida ◽  
João de Jesus Guimarães ◽  
Fernando Soares de Cantuário ◽  
Leandro Caixeta Salomão ◽  
...  
Keyword(s):  
Water Stress ◽  
Soil Water ◽  
Plant Height ◽  
Root Length ◽  
Sweet Corn ◽  
Block Design ◽  
Potassium Silicate ◽  
Stem Diameter ◽  
Corn Plant ◽  
Corn Plants

Water stress in sweet corn plants due effect of climatic events, such as El Niño, is difficult to monitor, leading to considerable losses. Silicon (Si) as an exogenous resistance elicitor may reduce water stress effects. The relationship between sweet corn plant age and its development, under induced water stress and leaf potassium silicate applications were evaluated. This work was carried out with the hybrid Tropical Plus®, in a randomized factorial block design with 15, 30, 45 and 60 kPa as soil water tensions in plots and potassium silicate doses (0, 6, 12 and 24 L ha-1) in subplots. Stem diameter, plant height and leaf number per plant were evaluated at 30, 45, 60, 75 and 90 days after seeding. Root length was measured on the 90th day after seeding. Sweet corn plants submitted to water stress conditions and Si application showed an age-dependent response. Water stress did not decrease stem diameter, plant height and number of leaves per plant sprayed with Si. Root length was longer with 60 kPa soil water tension. Silicon reduced negative impacts of water stress on sweet corn plants.

scholarly journals Aerial, ground and chemigation spray deposition on corn for the control of spodoptera frugiperda (lepidoptera: noctuidae)

2013 ◽  
Vol 37 (2) ◽  
pp. 123-129
Author(s):  
João Paulo Arantes Rodrigues da Cunha ◽  
Ana Paula de Castro Nascimento
Keyword(s):  
Active Ingredient ◽  
Spodoptera Frugiperda ◽  
Zea Mays L ◽  
Spray Deposition ◽  
Sprinkler Irrigation ◽  
Plant Leaves ◽  
Corn Plant ◽  
Set Up ◽  
And Control ◽  
Lepidoptera Noctuidae

Pesticides can be applied by aircraft, ground-sprayers or sprinkler irrigation. However, selecting the best option is complicated by the limited number of studies comparing these techniques. Thus, the objective of this work was to study the chlorpyrifos insecticide deposition applied by aircraft (30 L ha-1), tractor-mounted sprayer (200 L ha-1) and chemigation (70,000 L ha-1) for the control of Spodoptera frugiperda (J.E. Smith) in two corn (Zea mays L.) populations (70,000 and 100,000 plants ha-1). Active ingredient residue on the corn plant leaves was evaluated by gas chromatography, immediately and ten days after the treatments. Armyworm numbers in each plot and control were also evaluated. The experiment was set up in randomized blocks with four replications. Aerial and ground applications of chlorpyrifos led to greater active ingredient deposition in the leaves than chemigation. Neither plant population (70,000 and 100,000 plants ha-1) affected the insecticide deposition in the corn leaves. S. frugiperda control was similar for all three application methods. Chemigation, however, resulted in less deposition on the plants and consequently in a greater insecticide loss to the soil, which should be considered in environmental impact.

RESPON TANAMAN JAGUNG MANIS (Zea Mays L.) TERHADAP PEMBERIAN PUPUK GUANO KELELAWAR DAN PUPUK GUANO WALET

2020 ◽  
Vol 11 (1) ◽  
pp. 33
Author(s):  
SELVY ISNAENI ◽  
SITI NURHIDAYAH
Keyword(s):  
Zea Mays ◽  
Experimental Design ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Block Design ◽  
Corn Plant ◽  
Organic Cultivation ◽  
Randomized Block Design ◽  
Experimental Garden ◽  
Bat Guano

Organic farming has become very important for the continuity of agriculture in Indonesia. In addition to harvesting organic crops is healthy, the process of organic cultivation is also an effort of farmers to make improvementets to soil quality. This research aim to determine how the response to the administration of various doses of bat guano fertilizer and guano swallow fertilizer on sweet corn plant by the addition of phosphate solvent microbes. The study was conducted in the experimental garden of the Faculty of Agriculture, Universitas Perjuangan Tasikmalaya. The experimental design used factorial randomized block design with 3 treatment of bat guano fertilizer dosage and 3 treatments of guano swallow fertilizer dosage, each treatment was repeated 3 times and each treatment was given phosphate solvent with the same dose. The result showed that there was an interaction between guano bat fertilizer and guano swallow at 6 and 8 week after planting leaves in the treatment of K0W1 (0 tons / ha bat guano + 2.5 ton / ha swallow guano) and K1W2 (2.5 tons / ha Bat guano + 3.75 tons / ha swallow guano), but there are no interaction on other parameters. There are no maximum doses for guano bats and guano swallow in the response of sweet corn plant.

Relationship Between Weed Communities in Corn and Infestation and Damage by the Stalk Borer (Lepidoptera: Noctuidae)

1991 ◽  
Vol 26 (2) ◽  
pp. 253-260 ◽  
Author(s):  
Daniel M. Pavuk ◽  
Benjamin R. Stinner
Keyword(s):  
Larval Survival ◽  
Severe Drought ◽  
Corn Plant ◽  
Stalk Borer ◽  
Weed Communities ◽  
Corn Fields ◽  
Corn Plants ◽  
The Relationship ◽  
Lepidoptera Noctuidae

During 1988 and 1989, the relationship between different weed communities in corn plantings and infestation of and damage to corn by the stalk borer, Papaipema nebris (Guenée) (Lepidoptera: Noctuidae), was studied in Ohio. The four treatments were corn without weeds, corn principally with broadleaf weeds, corn principally with grasses, and corn with a mixture of both weed types. In 1988, there were no significant differences between treatments with broadleaf weeds and treatments without broadleaf weeds, and between treatments with grassy weeds and treatments without grassy weeds, in terms of number of larvae per corn plant and number of corn plants damaged. Low populations of P. nebris in corn during 1988 may have been associated with severe drought which caused low larval survival. There were significantly more larvae per corn plant and a significantly greater percentage of corn plants damaged in plantings containing broadleaf weeds than in corn plantings without broadleaf weeds in 1989. The results of this study show that the presence of broadleaf weeds in corn fields may lead to increased infestation of corn by stalk borer larvae.

scholarly journals Granting of Organic Fertilizer and NPK Fertilizer to Growth and Results of Sweet Corn (Zea Mays. L)

2018 ◽  
Vol 7 (4.15) ◽  
pp. 427
Author(s):  
Sri Hidayati ◽  
Mahrus Ali ◽  
Sri Purwanti ◽  
Nurul Huda ◽  
Nurlina .
Keyword(s):  
Zea Mays L ◽  
Sweet Corn ◽  
Block Design ◽  
Organic Fertilizer ◽  
Growth And Yield ◽  
Real Effect ◽  
Randomized Block Design ◽  
Two Factors ◽  
Npk Fertilizer ◽  
Corn Plants

The aim of research is to test the combination of organic fertilizer and NPK fertilizer, test organic fertilizer, test NPK fertilizer that is suitable for the growth and yield of sweet corn. This research method using Randomized Block Design (RAK) arranged factorial consists of two factors, namely Organic Fertilizer (cage) with 3 levels of treatment (K) and NPK Fertilizer with 3 levels of treatment (M). Each treatment was repeated 3 times and each treatment combination consisted of two sample plants. The results of this study showed that the overall treatment of the combination of organic fertilizer and NPK fertilizer on the growth and yield of sweet corn plants did not show a real effect. Separately the treatment of organic fertilizer gave a very real effect on all observation variables, the average organic fertilizer as much as 17.5 tons / ha or 1.5 kg / tan (K3) gave the highest growth and yield of sweet corn compared to other treatment, Separately the treatment of NPK fertilizer gave a very real influence on all observation variables, the average NPK fertilizer with a composition of 450 kg Urea + 150 kg TSP + 75 kg KCl) / Ha or 9 g + 3 g + 1.5 g / tan (M3) gives the highest growth and yield of sweet corn compared to other treatments. Person. 

OPTIMUM RATIOS OF NITROGEN AND PHOSPHORUS FERTILIZERS FOR CORN DETERMINED BY HOMÈS’ METHOD OF SYSTEMATIC VARIATIONS

1970 ◽  
Vol 50 (2) ◽  
pp. 141-150
Author(s):  
ERIC G. BEAUCHAMP ◽  
H. A. HAMILTON
Keyword(s):  
Dry Matter ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Maximum Yield ◽  
Plant Tissues ◽  
Corn Plant ◽  
Replacement Series ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Fertilizers ◽  
P Fertilizers

A greenhouse experiment was carried out to investigate the possibility of an optimum N/P ratio for sweet corn (Zea mays L.), using Homès’ method of systematic variations.Three levels of N and P fertilizers were applied to a soil. Each level was comprised of nine fertilizer treatments differing only in N/P ratio in a replacement series. Accordingly, the three levels represented 8.12, 16.04, and 32.02 meq per 4.4 kg soil of NO3− plus H2PO4−, respectively.There appeared to be a definite N/P ratio of fertilizer which resulted in a maximum yield and which was similar for all three levels of the replacement series of N plus P. However, this effect was most pronounced at the highest level of N plus P. The Homès method for determining the optimum N/P ratio of a fertilizer was successful primarily at the highest level of N plus P.N/P ratios of corn plant tissues from about 9 to 18 coincided with maximum dry matter yields at the highest level of N plus P.

scholarly journals THE EFFECT OF FERTILIZER UREA AND KCL ON ULTISOL AND INCEPTISOL TOWARD SOIL CHEMICAL PROPERTIES ON CORN ( ZEA MAYS L. ) GROWTH

2016 ◽  
Vol 1 (1) ◽  
pp. 50-55
Author(s):  
Wira Okriadi Lubis
Keyword(s):  
Zea Mays ◽  
Nitrogen Content ◽  
Soil Acidity ◽  
Zea Mays L ◽  
Chemical Properties ◽  
Dry Weight ◽  
Chemical Effect ◽  
Corn Plant ◽  
Two Factors ◽  
Corn Plants

The research was conducted at green house of Agriculture Faculty, North Sumatera University. The research was done to study on the Urea and KCl fertilizer of chemical effect characteristic and growth of corn plant at Ultisols and Inceptisols. The research designed by randomized block factorial with two factors and four dosage replications. The first factors were kind of soils (Ultisols and Inceptisols). The second factor was Urea and KCl fertilizer, each others at 0 ppm, 100 ppm, 200 ppm, 300 ppm N and 0 ppm, 100 ppm, 200 ppm, 300 ppm K2O. The result showed that application of Urea and KCl fertilizers increased height and dry weight of corn plants, soil acidity, nitrogen content and exchangeable Kalium at Inceptisols. Dosage excess of Urea was more at 100 ppm N responsible on height and weight of corn plant.

scholarly journals The influence of fermented brown algae extract (Sargassum sp.) on corn plant growth (Zea mays L.)

2021 ◽  
Vol 911 (1) ◽  
pp. 012051
Author(s):  
K.A.I Nurjannah ◽  
N A. Amaliah ◽  
M Junda ◽  
N Iriany ◽  
A T. Makkulawu ◽  
...  
Keyword(s):  
Zea Mays ◽  
Bacillus Subtilis ◽  
Plant Growth ◽  
Brown Algae ◽  
Zea Mays L ◽  
Block Design ◽  
Organic Fertilizers ◽  
Corn Plant ◽  
Randomized Block Design ◽  
Corn Plants

Abstracts Brown Algae Extract is one of the ingredients used in organic fertilizers that is more effective for maximizing the growth and production of corn plants. This study aims to determine the effect of fermented brown algae extract on the growth of corn. The research was conducted in Sokkolia Field, Gowa District. The treatments were arranged in a randomized block design with 4 replications. The first treatment was algae extract which was inoculated by Trichoderma harzianum and Gliocladium sp. Bacillus subtilis and Paenybacillus polymyxa as well as unfermented algae extract. The algae extract was applied to corn by spraying. The parameters observed were plant height, stem circumference, cob length (cm), cob diameter, number of rows of seeds. The results showed that application of algae extract improved the quality and quantity of corn growth compared to the UPK (Urea + Phosphate + Potassium) control.

scholarly journals Response of Growth and Production of Corn (Zea Mays L) with Liquid Fertilizer in Labuhan Batu Regency

2019 ◽  
Vol 6 (3) ◽  
pp. 363-370
Author(s):  
Fitra Syawal Harahap Harahap ◽  
Hilwa Walida ◽  
Dahrul Aman Harahap ◽  
Roswita Oesman ◽  
Wizni Fadhillah
Keyword(s):  
Zea Mays ◽  
Plant Growth ◽  
Leaf Area ◽  
Plant Height ◽  
Zea Mays L ◽  
Plant Sample ◽  
Fresh Weight ◽  
Liquid Fertilizer ◽  
Corn Plants ◽  
The Right

Growth and Production of Corn Plants (Zea mays L) with Provision of liquid supplementary fertilizer(PPC) is an alternative fertilizer that can increase plant growth and production. The constituents of thenutrients can provide elements that are not present in the soil. This study aims to get the right dose forgrowth and production of corn (Zea mays L). The treatment consists of 7 levels O0 = N, P, KRecommended dosage (Urea = 5 g / array; TSP = 2.50 g / KCl array = 1.87 g / array) O1 = Standardorganic compost / fertilizer (gr / plot) ) + N, P, K (Urea = 5 g / bolt; TSP = 2.50 g / bolt; KCl = 1.87 g/ bolt) O2 = 0.75 ml Primatan + N, P, K (Urea = 5 g / run; TSP = 2.50 g / run; KCl = 1.87 g / run) P3= 1.12 ml Primate + N, P, K (Urea = 5 g / run; TSP = 2.50 g / extract; KCl = 1.87 g / extract) O4 =1.5 ml Primatan + N, P, K (Urea = 5 g / extract; TSP = 2.50 g / extract; KCl = 1.87 g / array) O5 =1.5 ml Primatan + 0.75 N, P, K (urea = 3.75 g / run; TSP = 1.87 g / run; KCl = 0.14 g / run) O6 = 1.5ml primatan + 0.50 N, P, K (urea = 2.50 g / bolt; TSP = 1.25 g / bolt; KCl = 0.93 g / bolt). TreatmentP2 = 0.75 ml Primatan + N, P, K (Urea = 5 g / line; TSP = 2.50 g / line; KCl = 1.87 g / line) is able togive the best results for all parameters, namely plant height amounting to 44.09 cm, leaf area 241.19mm3, biomass weight per plant sample 271.50 g, selling fresh weight 225.50 g, total chlorophyll30.93units / 6 mm3.

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