What are the common diseases of maize?
Table of Contents
What are the common diseases of maize?
IDM for important diseases of maize
- Maydis leaf blight (MLB)/ Southern Corn Leaf Blight (SCLB) Causal organism: Biopolaris maydis.
- Turcicum leaf blight (TLB)/ Northern Corn Leaf Blight (NCLB)
- Curvularia leaf spot.
- Banded leaf and sheath blight.
- Charcoal rot.
- Fusarium stalk rot.
- Bacterial stalk rot.
- Common rust.
What is the major pest of maize?
The moth group (which includes cutworms, armyworms, earworms, borers, and grain moths) is the most damaging to maize worldwide, followed by the beetles (rootworms, wireworms, grubs, grain borers, and weevils).
What is the best pesticide for maize?
Corn rootworms (Larval control)
| Insecticide | Amount of Formulated Product |
|---|---|
| §Clothianidin (Poncho) | 1.25 mg/kernel |
| Material is applied to the seed by the seed supplier. Consult the label. | |
| § Tefluthrin (*Force 3G) | 4 oz./1,000 lin. ft. |
What diseases affect corn crops?
Corn has to survive a number of disease threats throughout the season, such as gray leaf spot, northern corn leaf blight, tar spot and common and southern rust. Managing these diseases early is essential to keeping your corn crop healthy and protecting your yields.
How do you control pests in maize?
Dig out a core from the soil and leave it for an hour on a warm day. If the larvae are present, they will come up to the surface. Control There is no spray chemical control available but if there are any larvae visible, an insecticide seed dressing of Sonido (thiacloprid) should be applied.
What causes maize rust?
VEGETABLE CROPS. Common rust on sweet corn is caused by the fungus Puccinia sorghi. Epidemics of this disease can cause serious losses in yield and quality of sweet corn. High rust susceptibility of many popular sweet corn hybrids is a major factor contributing to rust epidemics.
How do you control pest and diseases in maize farm?
Chemical control of insects, pathogens and weeds has been shown to be the most effective technology for preventing losses in maize crops and increasing maize yields in SSA. Many different insecticides, fungicides and herbicides have been recommended for control of maize pests.
How can maize diseases be controlled?
Despite the devastating effects of this fungal disease on yield, it can be easily controlled. Control measures include planting disease tolerant maize hybrids or the early application of fungicides to protect the upper leaves. Nativo can be applied, followed by Zantara®.
How do you control insects in maize?
(i)Stem borer: Stem borer or Chilo partellus is a major insect pest in India and infest maize crop during the kharif season all over India. Spray of Cholopyriphos @ 1-1.5ml/litre of water at 10-12 days after germination provides good control.
What are the symptoms of maize disease?
Symptoms
- – Small oval or elongated water-soaked spots which enlarge up to 15 mm long appear on leaves.
- – Lesions develop a tan center and red-brown or orange border.
- – Lesions may coalesce to form large necrotic(dead) patches.
- – Severely infected leaves on susceptible hybrids may wither and die.
How do you protect corn from pests?
- Apply five drops of corn oil or mineral oil to the silks on each ear of corn.
- Wrap the top of each ear of corn with a rubber band after the oil application.
- Spray Bacillus thuringiensis (Bt) onto the corn leaves and over the silk on each corn ear.
- Spread diatomaceous earth on the ground around the stalks of corn.
How do you control worms in maize?
To control the pest effectively, farmers need to scout their maize crop daily to be able to detect it early. Farmers using organic or biological methods of control should spray their maize crop only when the fall armyworm is at its second stage (larvae or second instar).
How do you control fall armyworms in maize?
Maintain fields weed free and follow balanced fertilizer application. Plan for maximizing plant diversity by inter cropping of maize with suitable pulse crops of particular region. Eg: Maize + pigeon pea/black gram /green gram. Plant Napier grass in the border rows to act as FAW trap crop.
How do you control rust in maize?
Maize rusts are generally controlled by the use of resistant maize hybrids, and by foliar applications of fungicides on sweet corn. Cultural practices may be effective in areas where rust spores can overwinter on debris or where infected Oxalis species are a source of spores.
How do you control rust on corn?
To reduce the incidence of corn rust, plant only corn that has resistance to the fungus. Resistance is either in the form of race-specific resistance or partial rust resistance. In either case, no sweet corn is completely resistant. If the corn begins to show symptoms of infection, immediately spray with a fungicide.
What are 3 methods of pest control?
As mentioned above, there are many pest control methods available to choose from, but they can be loosely grouped into six categories: Hygienic, Biological, Chemical, Physical, Fumigation, Fogging and Heat treatment.
What is the best method of pest and disease control?
The best way to control both pests and diseases is to keep plants healthy. Build healthy soil. Healthy soil provides a home to friendly insects and helps prevent many plant diseases. Plant resistant varieties.
What are the fungal diseases of maize?
Anthracnose stalk rot (Colletotrichum graminicola), Charcoal rot of maize (Macrophomina phaseolina), Crazy top downy mildew disease (Sclerophthora macrospora), Corn grey leaf spot disease (Cercospora zeae-maydis), Aspergillus ear and kernel rot (Aspergillus flavus), Corn smut (Ustilago maydis),Southern corn leaf blight …
What do you spray on corn?
In corn with Roundup Ready® 2 Technology, Roundup® brand glyphosate-only agricultural herbicides can be applied broadcast up to the V8 growth stage or 30-inch tall corn, whichever comes first. Drop nozzles should be used for optimum spray coverage and weed control when corn is 24 to 30 inches tall.
When do you spray insecticide on corn?
Corn that silks and develops after early July may suffer considerable damage from earworms. During this period, it is important to protect the ears by applying insecticides every other day during the time from silking until time of harvest.
