WELCOME TO MY PRESENTATION

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Prepared ByMd. Tamzid Rahman

ID: 13109091

Prepared ForPlant Pathology(AGR-371)

Instructor Dr. Farjana Sultana

Faculty memberCollege of Agricultural Sciences(CAS)

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Diseases of Yard Long Beans With Controls

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Anthracnose of Yard Long Beans

Pathogen Name: Colletotrichum sp.(Fungal disease)

Favorable condition: Anthracnose is favored by cool temperatures 600 F (160 C) and wet

condition.Symptoms Symptoms of anthracnose can appear on any part of plant

Lesions on leaves are dark brown

On the pods, the fungus produces black, sunken lesions.

Infected seed become discoloured changing to yellow through brown to black.

In damp weather, the centres of anthracnose lesions become covered with a pink spore mass.

Anthracnose of Yard Long Beans4

Controls Use certified disease-free seeds.

Plant resistant varieties Remove from the field and destroy crop debris after harvest.

Made a 2 to 3 year crop rotation Avoid overhead irrigation. Avoid movement of workers in the field when wet

Follow a good weed control program.

At last, Fungicide sprays can also be helpful(Use Tipsin M 2gm/L, Tilt-250 EC 0.5 ml/L, Daithena M-45 2gm/L).

Yard Long Bean leafs infected with Anthracnose5

Rust of Yard Long BeansCaused by: Uromyces vignae (Fungal

disease)Symptoms Brown gori (lesions).

Rust spots appear on all parts above the ground.

Numerous rust lesions particularly on the under surface of the leaf.

Severely infected leaves drop off.

Brown gori (lesions).6

Controls • Destroy crop residues after harvesting.

• Avoid continuous cropping of beans.

• Practise a 2 to 3 year crop rotation without legumes.

• Intercrop with cereals.• Plant resistant varieties where available

• A number of pesticides are available in the market. There are reports claiming that baking soda, compost tea spray, EM (effective microorganisms) and papaya leaf extract control bean rust.

At last use, Fungicide sprays with water. (Kyalixin 1ml/L, Tilt-250 EC 0.5 ml/L) Rust disease7

Downy mildew of Yard Long BeansCaused by: Peronospora paracitica

(Fungal disease)Symptoms Small yellow spots on the leaves

Pink fungus can be seen below the leaves

Older leaves die

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Controls Destroy crop residues after harvesting.

Remove the plant from the field

Fungicide spray with water (Daithena M-45 2.5 g/L if that is not work than use myanakojeba + metalexil – 2 gm / L).

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Bacterial Soft RotCaused by: Erwinia carotovora

(Bacterial disease)Symptoms The disease starts on leaves, stems, pods and underground parts as small, water soaked, translucent spots (lesions).

These rapidly enlarge in both diameter and depth.

The host tissue softens and becomes mushy or watery

Decompose plant tissues10 water soaked, translucent spots

Controls Remove infected plants immediately

Remove plant residues after harvest

plants are planted in well-drained soils

Avoid overhead irrigation.Use seed treatment by the Daithena M-45 0.2% Of the solution.

Soil and foliage insecticide treatment helps controls the bugs that frequently cause wounds and disseminate the bacteria. 11 Decompose plant tissues

Yellow Leaves diseaseCaused by: Mosaic Virus (Virus

disease)Symptoms Cupping and twisting of leaves with a light and dark green mosaic pattern.

The dark green tissue is often bubbled and/or in bands next to the veins

plants produce smaller, curled pods with a greasy appearance

It can be transmitted by several aphid species

Light and dark green mosaic pattern.12

Controls • Use certified and disease-free seeds

• Plant resistant varieties

• Remove infected plants from the field

• Control attacks of aphids by insecticides.

Cupping and twisting of leaves13

Have you any question ?

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THANK YOU15