WWW / TEA DISEASE

An Expert System For Tea Disease Manament

This is an Expert System for Disease Management in Tea. The common diseases causing major damages in tea have been considered

Developed by Indrajit Ghosh & Dr. R. K. Samanta
Please Fill up / Select the following!

Name:	Country:
E-MAIL:	Date :

General observations for Matured Bush

Bush Appearance

Apparently normal	Died suddenly
Partially dead	Dying gradually

Leaf Appearance

Curl or bended	Withered leaves remain attached
Dropped leaves attached together	Green leaves drop
Flaccid, pale & yellowish	Top leaves pale/ yellowish
None of the above

Observations of upper leaf surface

Yellowish spot	Yellowish & glistering spot
Brown spot	Grey spot
Greyish white spot	Concave oily spot
Brown & grey patch	Brown/light brown patch
Chocolate brown patch	Black patch
Patch black when wet	Yellowish patch
Patch with raised wavy margin	Patch circular/oval with concentric zonation
Grey patch with black dots	Patch swollen with purplish margin
Patch with greyish centred	Black pustules on patch

Observations of lower leaf surface

Convex white & powdery spot	Convex pink & powdery spot
Brown patches	Greyish white patches
White & dusted patches	Grey patch with black dots
White branching threads	Fan shaped film
Wooly pinkish white film	Wooly cream film
Wooly brown film	None of the above

Observations of stem

Stem die back	Steem breaks off
White powdery patch	Brick red/orange patch
Purplish black lesions	White branching threads
Thorny black pointed beak	Brown soft mycelium
Lesions with ring of callus	None of the above

Observations of collar region

Hairy shoots	Black grains of shot
Soft & brown mycelium	Black mycelium
Greyish mycelium	Wooly greyish mycelium
Red/black flusk like bodies	Yellow corky encrustation
Dull grey corky encrustation	Fawn coloured corky encrustation
Black paint like encrustation	Black charcoal like

Observations of root when dead bush dragged

Soft & brown mycelium	Cream mycelium
Black cobwavy mycelium	Greyish cobwavy mycelium
Black cushion or lumps	White cushion or lumps
Greyish black cushions	Hairy shoots
Root colour ink black	Root colour violet

Observations when root berk peeled away

White mycelium	Brown mycelium
Dull white silky mycelium	Black star like mycelium
White star like mycelium	Orange thick mycelium
Purplish black thick mycelium	Blue black wood

Observations of root when cut with knife

Dark black band	Black dot & dashes
Purplish/ink-black wood	Blue black wood

General observations for Nursery Plants

Bush Appearance

Apparently normal	Died suddenly
Unhealthy or sick

Leaf Appearance

Leaves yellowish

Lower leaves drop

Observations of collar region

Collar zone rotton	Callus growth on collar
Black dots on berk

Observations when collar scrapped with knife

Wood brown	Wood bluish
Black lines on wood	Black rings on wood

General Field Observations

Soil status	Shade status
Weekly av. temperature	Humidity
Drainage	Weekly av. rainfall

(You may have to try 3-4 times due to Proxy server problem. If no response within 8-10 seconds: please press 'Submit' button repeatedly with 8-10 second interval).