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Destructive Insects Act, 1907. [July, 



be done with an ammoniacal solution of carbonate of copper. 

 This is prepared by dissolving 1 oz. of carbonate of copper and 

 5 oz. of carbonate of ammonia in about a quart of hot water, 

 afterwards diluting with 16 gallons of water. Spraying should 

 be commenced just when the leaves are expanding and be re- 

 peated three times at intervals of six days. 



Plane Leaf-scorch. — An inquiry was received as to a cure for 

 the disease known as Plane Leaf-scorch, Gloeosporium nervise- 

 quum. In the case of this fungus the leaves and shoots of the 

 plane tree can only be infected during the very earliest stages 

 of growth. To prevent infection spraying should be carried out 

 when the leaf-buds are expanding, and again when new shoots 

 are forming, with an ammoniacal solution of copper carbonate 

 prepared according to the formula given above (" Shot-hole " 

 Fungus). In the case of nursery stock, where the unsightliness 

 produced is of less importance, half normal strength Bordeaux 

 mixture (10 lb. sulphate of copper and 5 lb. of lime to 100 

 gallons of water) may be used. Where the disease has existed 

 the dead leaves should be collected and burned, while shoots 

 that have been attacked should also be removed and burned. 



Finally, specimens of apple shoots from an orchard at 

 Salisbury had been killed by the " Brown Rot " fungus, 

 Sclerotinia fructigena, Schrot, described in Leaflet No. 86 ; 

 bush fruit trees from Earl's Barton, Northampton, were 

 suffering from "White Root Rot," dealt with in Leaflet No. 64; 

 while a case of the potato disease, Phytophthora infestans, 

 De Bary, was sent by a correspondent from Ottery St. Mary, 

 Devon. 



The object of this Act, which came into force on the 

 4th of July, 1907, is to extend to all pests destructive to 

 crops, trees or bushes the powers which 

 Destructive Insects may be exercised in Great Britain by the 

 and Pests Act, 1907. Board of Agriculture and Fisheries, and 

 in Ireland by the Department of Agri- 

 culture and Technical Instruction for Ireland, under the 

 Destructive Insects Act, 1877, in relation to the Colorado 

 Beetle. 



These powers and provisions as applied with modifications 

 by the Act are : — 



