Transactions and proceedings of the New Zealand Institute . in other cases, be efficacious. There is a common beliefwhich, like most superstitions, it is excessively difficult to de-stroy, that sulphur is an useful ingredient in what are called scaly-blight destroyers. I should not be in the least surprisedto find that many who hold this belief do so because they havefound the black fungus disappear, or lessen, after its use, forsulphur is undoubtedly a remedy for fungoid blights—, oidium,etc. ; and probably they never thought of looking more closelyinto the matter. All experience goes to
Transactions and proceedings of the New Zealand Institute . in other cases, be efficacious. There is a common beliefwhich, like most superstitions, it is excessively difficult to de-stroy, that sulphur is an useful ingredient in what are called scaly-blight destroyers. I should not be in the least surprisedto find that many who hold this belief do so because they havefound the black fungus disappear, or lessen, after its use, forsulphur is undoubtedly a remedy for fungoid blights—, oidium,etc. ; and probably they never thought of looking more closelyinto the matter. All experience goes to show that sulphur,unless applied in such strength as to burn up insects, fungus,tree and all, is not a remedy against Coccids. Comstock, Riley,Hubbard, and others agree in this : and although, in newspaper J Boudier (Assoc. Fran, pour Iavancement des Sc, 1884) includes theEuropean fungi developed in the honeydew of Aphis in the genus Clado-sporhim (Quart. Journ. Roy. Micros. Soc, Aug. 1886, p. 597). IrnusatJians ^m ganlait^ Jn$tit«i^^ Vol. xix. Pi. A^£py ZE^L/IND COCCID/E. Maskell.—Further Notes on Coccidse. 46 accounts, and in the replies of farmers to questions from officialsor committees, we find sulphur a common ingredient in thethousand-and-one mixtures recommended, I doubt very much ifanybody could give an intelligent reason for its employment. No harm will therefore have been done, I think, if thispaper should induce gardeners and fruit-growers to go direct tothe true origin of disease in their trees and neglect thesecondary one. That the fungus will grow independently ofscale-insects is, of course, indisputable : but those who wiselyconsider it as, in the vast majority of cases, merely an accessoryto their presence, and who set themselves to destroy the Coccidaeor AphidiJffi on the plants, will find the black fungus also veryquickly disappear. EXPLANATION OF PLATE I. Fig. Irt. Ctenochiton elcBocar-pi (larva) magnified, with waxy test removed;showing
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