65 



As to the cost of dynamiting, this must vary according to- 

 local conditions. In the Western Province 4d. per hole for tree- 

 planting is a fair average estimate including labour, using one 

 cartridge for the charge, and contractors are prepared to under- 

 take the work at 6d. per hole, providing all materials and reliev- 

 ing the farmer of trouble and responsibility in the matter. 



In this short space the subject can only be briefly dealt with, 

 and farmers who are interested should write for advice to the 

 Cape Explosives Works Ltd., P.O. Dynamite Factory, C.P., who 

 maintain a special department in connection with their agricultural 

 specialities. 



INSECT PESTS AND INSECTICIDES. 



By C. P. Lounsbury, Chief, Division of Entomology, Union Depart- 

 ment of Agriculture. 



The Union entomologist, Mr. C. P. Lounsbury, is keenly alive 

 to the interests of fruit growers, his department having been for 

 twenty years the guide, philosopher and the friend of all fruit 

 growers. He has kindly compiled for us the following most 

 comprehensive and up-to-date particulars as to all our pests and 

 how to treat them, and we are, and we feel growers will be, 

 deeply indebted to him for enabling us to place his valuable re- 

 commendations at our disposal. 



The pests discussed in the following lists are those regarding 

 which complaints are most frequently made to the Division of 

 Entomology, and the remedies given are those considered by the 

 Division to be most generally useful under South African con- 

 ditions. When more than one treatment is mentioned against a 

 name, the first is the most important. To save space, " arsenate " 

 is sometimes used to mean arsenate of lead, " cyanide " to mean 

 hydrocyanic acid gas, " resin '' to mean resin wash, etc. 



The recommendations, and also the directions for preparing 

 the various insecticides, are given as concisely as possible, and 

 therefore every word should be regarded as important. More 

 detailed information on any particular matter would be given to 

 any applicant. The postal address of the central office of the 

 Division is " Box 513. Pretoria " ; that of the Cape branch " De- 

 partment of Agriculture, Cape Town"; and that of the Orange 

 Free State branch " Government Buildings, Bloemfontein." En- 

 quiries may also be addressed to the several schools of agricul- 

 ture located, respectively, at Mulders Ylei. C.P.. Middelburg. 

 C.P., Potchefstroom, T.'P.. Cedara. Xatal. and Glen. O.F.S. 

 Whenever practicable, enquiries should be accompanied by speci- 

 mens. 



