RKSTEAFORM

A TEA PEST MANAGEMENT SYSTEM

This is an Expert System for Pest Management in Tea. The common pests and causing major damages in tea have been considered

Developed by Indrajit Ghosh & Prof. R. K. Samanta
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General Observations

Bush Appearance

New flush stunted	Die back symptom	Swelling symptom	Sick or wilting
Cut off near ground	Mud runs on frame	Chlorosis symptom	Defoliation
Tender shoot die back	None of the above

Site of Damages

Not clear	Young leaf	Matured leaf
Stem	Tender stem & bud	Young leaf & bud

Leaf Appearance

Normal	Dry up	Leathery
Dusted white	Curved downwards	Curved upwards
Tied up togather	Rolled	Pasted one above another
Crinkled & curled	Deformed	Margin recurved & brown
Withered

Leaf eaten as

No eaten mark found	Irregular perforation	Bites of the edges
Eaten away from margin	Epidernal eaten away	Eaten away partially
Skeletonized leaves

Other observations

Leaf Surface	Mid Rib colour
Vein colour	Finger Tip test
Tip colour	Edge colour
Leaf colour

Leaf spot observed

Light brown ring or spot	Dark brown ring or spot	Yellow dots
Reddish brown dots	Reddish brown patchs	Sand papery lines
Reddish dots	Not found

Stem symptom observed

Normal appearance	Small hole	Spiral run
Bark damage on patches	Portion covered with silken wave	Pinkish oval pallets on ground
Pin head holes	Swoelling	Bark damage with callus growth
Group of insects on stem

Root symptom observed

Swoelling or Gulls	Callus formation
Bark damage in collar area	Wood below callus exposed
Normal appearance

Morphological findings (if available)

Insect length

Covered with

Body colour

Special observations-1

Blakish brown transverse band	Yellowish longitudinal lines
Two sub dorsal strips	Speckled with white dots
Covered with white hairs	None of the above

Special observations-2

Last 3 abd-seg dilated	End pair prolegs largest
Claspers at hind end	Brown head
Blakish brown head	Clusters of pests on branches
Insect appears as dry crampled leaf

Tubercles

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