American Gooseberry Mildew . 
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to the leaves. The spores are caught up and carried by 
the least movement of the air to neighbouring or distant 
gooseberry bushes, where they sprout, and thus rapidly spread 
the disease. The mildew also attacks the young berry, usually 
on one side, and consumes by its suckers the contents of 
the subjacent cells of the berry. The fruit is distorted and 
rendered completely useless. Every effort should be made to 
destroy the diseased tips of the branches before the new life 
Fig. 3. — The Ameriean.Gooseberry Mildew (Sphcerotheca Mors-uvce Berk, and Curtis). 
A, Twig of gooseberry bush, the upper portion attacked and distorted by the fungus, b, A portion 
of the twig enlarged, showing the fungus, c, The globular body (perithecium) with the mycelium. 
d, A sac (ascus) with its eight spores, e, A fruiting branch of the mildew stage, a— d are drawn from 
the specimens received from the Worcestershire County Council, b is after Mr. Salmon, Journ. B. Sort. 
Soc., 1902, page 600. 
begins in spring. The Worcestershire County Council has 
undertaken, with the approval of the owner, to cut off and 
burn every infected part in the nursery from which I received 
the diseased twigs. 
The fungus has come to us from the United States, where 
it is found on wild native species of Bibes, and for more than 
twenty-five years it has done great harm to the cultivated 
gooseberry ( Bibes Grossularia Linn.), introduced into the 
