120 DESTRUCTIVE INSECTS OF VICTORIA : 



advised that the trees should be chopped down on both 

 sides of the race, and this precaution will no doubt pre- 

 vent a repetition of the trouble. 



This moth is also found in several of the other States, 

 and is everywhere a serious pest. Mr. French, jun., 

 remarks that around Melbourne numbers of the pupae of 

 this moth are destroyed by small Hymenopterous insects. 



Prevention and Remedies. 



Fortunately, these grubs are amenable to treatment. 

 In plantations, a good deal may be done by constantly 

 watching the young trees and spraying with kerosene or 

 red oil, one in fifteen, as a deterrent, and, as the insects 

 seem to favour saplings, the application would be neither 

 costly or difficult. If it should be found that the grubs 

 have commenced their work of stripping the leaves, a few 

 sprays, either of Paris green or arsenate of lead, will soon 

 kill them. It may be said that to spray a forest would be 

 out of the question. Spraying a forest is not recommended, 

 only the embryo forest, the plantation, which if left to 

 itself will in all probability never reach the forest stage for 

 which it was intended. It is hard to induce some people 

 to credit the enormous damage done to forests by insects. 



If forestry is to take its proper place as an industry in 

 Victoria, the study of forest pests should be one of 

 the principal subjects in the curriculum of a school of 

 forestry. 



