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PRACTICE-1 TO STUDY ABOUT DISEASES OF MANGO

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(1)

PRACTICE-1

TO STUDY ABOUT DISEASES OF MANGO

Department of Plant Pathology

M.S.Swaminathan School of Agriculture,CUTM

(2)

Identification of Mango Disease in field Condition

Anthracnose of Mango Causal organism-

Colletotrichum gloeosporioides

(3)

Bacterial Blight of Mango

Causal organism-Xanthomonas campestris pv. mangiferae-indicae

(4)

Red rust of Mango Causal organism-

Cephaleuros virescens

(5)

Sooty mould of Mango

(6)

Procedure of slide preparation

• Place a drop of fluid(Cotton blue or Lactophenol) in the center of the slide.

• Position sample(Thickness of 5mm) on liquid, using tweezers.

• At an angle, place one side of the cover slip against the slide making contact with outer edge of the liquid drop.

• Lower the cover slowly, avoiding air bubbles.

• Remove excess water with the paper towel.

(7)

Identify the conidia

Conidia of

Colletotrichum gloeosporioides

(8)

Identify Charecteristic of pathogen

• Mycellium consist of septate,branched and slightly dark coloured hyphae.

• The hyphae developed the fruiting body known as acervulus.

• The acervulus produce closly packed,singlecelled,colourless conidiophore that produce oval to oblong conidia on their tip.

• Conidia are non septated measuring about 12-16×4-6µ in dia.

and some time possess oil globulase.

• Acervulus produce sterile hair like structure known as setae.

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