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(162) next ››› Plate IIIPlate IIIBlights of tea & rice

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Plate III.

Vegetable blights of Tea and Rice.

FIG. 1. Portions of two shoots of Tea affected by Cephaleuros virescens
as a bark-blight
Nat. size.
" 2. Vertical section of the bark; showing algal cells permeating its
entire thickness down to the level of the bast
x 150
" 3. Vertical section of the bark; showing great thinning owing to
detachment of successive strata from the surface, and the
expansions of algal tissue which cause this
x 150
" 4. Vertical section showing normal structure and thickness of the
bark of Tea
x 150
" 5. Portion of a Tea-plant affected by "Thread-blight"; showing the
strands of mycelium which run along the shoots from leaf to
leaf to give origin to destructive mycelial expansions over
the under surfaces of the leaves
Nat. size.
" 6. Root-blight of Tea caused by invasion of the tissues by fungal
mycelium
"
" 7. Rice affected by Ustilago "
" 8. Spikelet of Rice with one grain affected by Ustilago "
" 9. Spores of the Ustilago of Rice x 1030

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