Insects Injurious to the Cherry. 



191 



The pupal stage is found to last from twenty-one to twenty- 

 five days. 



The second brood, which mainly occurs in September, lay their 

 eggs in a similar manner, and the larvte remain feeding under the 

 bark all the winter. They commence to pupate about the 30th of 

 April, and finish by the second week in May. 



But in 1906 there were still lar\^;e on the 12th of May. Just 

 previous to hatching the pup;ip force their way out of the bark and 

 the moths escape. 



Prevention and Treatment. 

 Prevention may possibly be carried out by smearing trees in 

 infested orchards, at the time the moths are about, with some noxious 

 mixture. Cow-dung or clay and lime would make a good mixture ; 



a good smearing of grease, if a pure sample is olitained, might be 

 similarly used. 



^tr. Levy's plan of thickly coating the stems with pitch has been 

 found to do no harm to the trees, and has certainly reduced the 

 numbers of the insect. A good brushing or painting with arsenate 

 of lead and clay might kill the caterpillars eating in or out of the 

 trunk if put on thickly.* If only a few trees are attacked the larvic 

 may be killed by cutting into the tunnels with a knife or probing 



with a stift' wire. 



Eeferences. 



(1) Theobald, F. V. Journal Board of Agriculture, p. 165 (1897). 



(2) Stainton, H. T. 'A Manual of British Butterflies and Moths,' vol. II., 



p. 241 (1859). 



(3) Kollar, V. 'Insects Injurious to Foresters, Fruit Growers and Gardeners,' 



(Eng. Trans.), p. 236 (1840). 



* This has been tried by Mr. Honeyball of Teynhaui, but found to do no 



