18 DESTRUCTIVE INSECTS OF VICTORIA. 



said, the effect depends on the thoroughness with which 

 the work is done, not on the amount applied. The object 

 is to get the thinnest possible layer of material on every 

 leaf and fruit, and all beyond that is waste. 



On a cool calm day spray at any hour. On a hot day 

 spray during the early morning or late in the afternoon. 

 Never spray any kind of fruit tree when it is in bloom. 

 The soundness of this latter advice, re spraying the tree 

 whilst in bloom, has been contested, but the testimony 

 in its favour is of such an overwhelming nature that it 

 cannot, I think, be successfully disputed. 



In bringing these few remarks concerning the Black 

 Peach Aphis to a close, I would here respectfully ask the 

 kind assistance and co-operation of growers and others 

 who, by their observations in the field, can be of the 

 greatest service to this branch of the Victorian Depart- 

 ment of Agriculture, by sending from time to time the 

 results of their experiences, the receipt of which will 

 greatly add to a more general knowledge of the subject, 

 and which cannot fail to be of mutual advantage. I 

 sincerely trust that growers will continue to accord me 

 their support and active assistance, for the growers and 

 the entomologist must go hand in hand to obtain the 

 best results, as the grower is in the field daily and can 

 tell how things are going on, and, as has been said by a 

 distinguished economic entomologist, he is an assistant 

 the entomologist cannot well do without. 



