Trapping 



often in the soil, where their eggs are laid and where 

 their larvae feed. 



XI. The chrysahdes of many sawflies, such as 

 those attacking the apple, pear, cherry, gooseberry, 

 rose, and Solomon's seal, are formed about two inches 

 beneath the surface of the soU and remain there 

 throughout the winter. They may be destroyed by 

 skimming off the top two inches or so and burning 

 it during winter or burying it deeply. Sawflies 

 rarely travel far, and this prevents the persistent 

 return of the attack which so frequently occurs. 



XII. Trapping. — The females of the winter moth, 

 mottled umber and March moth, are practically 

 wingless, and they have therefore to walk up apple, 

 pear, and plum trees in order to deposit their eggs 

 near the tips of the shoots. The tying of a band of 

 paper about 5 inches deep around the stem of the 

 tree at a height of\about 3 feet from the ground, and 

 keeping upon it a ring of sticky grease from the 

 beginning of October to the end of March, will effect 

 the capture of the majority of these moths, which 

 will die on the " fly-paper " so made. Haybands 

 similarly tied in late August round the trunks of 

 trees attacked by codling moth will afford shelter 

 for the caterpillars, which leave fallen fruits and seek 

 a crevice in the bark to hibernate. But lead 

 arsenate spraying in May is better (see p. 132). 



Where slugs are prevalent cabbage or lettuce 

 leaves laid on the soil surface near their haunts will 



127 



