146 DESTRUCTIVE INSECTS OF VICTORIA: 



Prevention and Remedies. 



In Victoria we have a somewhat similar parasite 

 which works great havoc amongst the grubs ; and in 

 this connection, I think, we may with safety attribute 

 the periodical scarcity of this pest, which is so noticeable 

 in most of the forest lands of our State, to the above- 

 named cause. 



Other natural causes, such as bush, fires and storms, 

 without a doubt assist materially in keeping a check on 

 the number of these grubs, which, if not thus destroyed, 

 would largely help to ruin the greater portion of our 

 forests. 



In plantations of young trees, the pest may be kept 

 in check by spraying with the following : One Ib. Paris 

 green (paste form being the easiest to use) ; four Ibs. 

 lime, well mixed, strained, and diluted with 150 gallons 

 of water (for ripened foliage) ; and, of course, somewhat 

 weaker for the younger and more tender growth. This 

 treatment of trees is both simple and most effective ; and 

 for taller trees say up to forty or fifty feet in height 

 a powerful pump and a frame erected on a lorry being 

 all that is necessary for good and effective work. 



Where fruit trees are affected, the usual spraying of 

 either Paris green or arsenate of lead will soon make 

 short work of the attacking grubs. 



Mr. C. French, Jnr., has made the discovery of a 

 disease of bacterial origin, which turns the grubs a 

 yellowish-brown color; and grubs so attacked usually 

 shrink and rot away. This disease was first noticed by 

 my son, and was common in the years 1906 and 1907. 

 The economy of these two moths being so much alike, 

 we are relying upon the figures on our plate for further 

 information as to color, etc. Both kinds of this moth 

 are common also in New South Wales and in some of 

 the other States. 



