REMEDIES 10 [INST THE ATTACKS OF OTC 



beetles, water-beetles, the larva- of Tenebi and of 



lady-beetles (( o i inella), and those of the lace-winged flies 

 (Ohrysopa) which prey on Aphides, though the ma. 

 the Syrphus flies are more abundant and efficacioa 

 Aphis- destroyers. 



Preventive and Direct Remedies Against the Attacks 



of Insects. 



[n applying any remedies againsl noxious insects, it is of 

 prime importance to become thoroughly acquainted with the 

 habits and transformations of the pests with which we have 

 to contend. It Bhould be borne in mind that insects during 

 their transformations lead different lives, and that practi- 

 cally a caterpillar is a different animal from the chrysalis or 

 the butterfly, with entirely different habits and surround- 

 ings; and bood throughout the other orders of insects. 



Under the head of general or preventive remedies may be 

 enumerated : 



High culture, with the use of plenty of manures and 

 fertilizers. 



Rotation of crops, and early or late sowing. 



Raising crops to last Un- two years, such as peas and 

 beans, to guard againsl wee\ ils. 



The breeding of insect-parasites. 



Burning grass and stubble for certain insects injuring 

 field-crops. 



Removal of dead trees or stumps mar orchards or in 

 forests. 



Among direct remedies, besides band-picking, is the 

 of the following insecticidi 



Tans green and London purple. 



Kerosene emulsions. 



Pyrethrum or Persian insect-powder. 



Bisulphide of carbon for the grape-rool I 



Carbolic-acid soap; whale-oil soap. 



Ammonia or chloroform for insect-biti 



