39 



tallow and rosin together. When dissolved, add the same to the potash 

 and soda in the barrel, and stir well for five minutes or so. Leave standing 

 for about two hours, then fill up with water, stirring well as every bucket 

 of water goes in. Use the following day, one pound to the gallon of water; 

 apply warm. This remedy is best adapted to pears and apples. 



1 append also here the receipt for Professor Riley's kerosene emulsion, to 

 which reference is made in various places: 



Kerosene, two gallons=67 per cent; common or whale-oil soap, one half 

 pound; water, one gallon=3o per cent. 



Heat the solution of soap, and add it boiling hot to the kerosene. Churn 

 the mixture by means of a force pump and spray nozzle for five or ten 

 minutes. The emulsion, if perfect, forms a cream, which thickens on cool- 

 ing and should adhere, without oiliness, to the surface of glass. Dilute, 

 before using, one part of the emulsion with nine parts of hot water. The 

 above formula gives three gallons of emulsion, and makes, when diluted, 

 thirty gallons of wash. 



CHAPTER III. 



LEPIDOPTEROUS LARVA BORING IN FRUIT. 



Codlin moth— Eemedies for— Paris green— London purple— Sulphur— Measures to catch 

 the larvae- Picking off infested fruit — Thissell's moth trap— Measures aiming at the de- 

 struction of the moth— Remedies aiming at the destruction of the hibernating larvse— 

 Parasites and predaceous insects — Peach moth. 



CODLIN MOTH. 



Carpocajmi Pomonella. (Fig. So.) Order, Lepidoptera; Family, Tortricidx^ 



Figure No. 25. 



cription.—a, section of an apple ruined by the burrowings of the larva?, and cliannel 

 lich it leaves, when full grown, at the left; b, the point at which the egg, for the first 



Descri 



by whic -^, ^, , . -^ 



brood, is usually laid, and at which the young worm enters; c, the worm or larva, full 

 grown, with black or brown head, body white when young, cream colored at maturity, and 

 pink just before changing to chrysalis; h, head of larva magnified ; /, the cocoon which it 

 spins, usually under a scale of bark; d, the chrysalis to which the larva changes in the 

 cocoon, of an amber or chestnut-brown color; /, the moth which escapes from the chrys- 

 alis, at rest; g, the same with wings expanded. 



