36 FOREST PROTECTION 



V. PROTECTION AGAINST INSECTS AFFECTING SEEDLINGS 

 IN NURSERIES. 



A. Against Curculionid^. 



(1) Do not leave any pine stumps in or near nurseries. 



(2) Raise healthy transplants, on well-manured soil. 



(3) Collect adults under bark traps, and collect larvae on billets buried 

 obliquely. 



B. Against Scarab^id^ ( June Bugs). 



(1) Collect adults in early morning from bushes. 



(2) Cultivate four or five times that section of the nursery which is 

 lying fallow. 



(3) Protect insectivorous birds. 



(4) Trap the larvas beneath reversed sods of grass. 



(5) Separate the beds by deep trenches. 



(6) Irrigate freely — if possible, raising the water in the trenches from 

 time to time to the level of the beds. 



(7) Cultivate the beds heavily and frequently, particularly during 

 the winter months. 



C. Against Noctuid^ (Cut Worms). 



(1) Catch adu.ts at night with sugared apples. 



(2) Poison caterpillars with cabbage sprinkled with arsenic and laid 

 along the nursery beds. • 



(3) Irritate caterpillars by continuous cultivation of soil. 



D. Against Cicadid^. 



Do not keep any broad-leaved trees or bushes in or near the nursery 

 on which the eggs might be deposited. Injection of bisuIphMj^of carbon 

 into soil is recommended by Bureau of Entomology, Bui. No. 14, p. 111. 



E. Against Gryllid^e (Crickets). 



(1) Protect moles, crows, etc. 



(2) Keep deep trenches between the beds, and use short beds. 



(3) Insert earthenware pots at the intersection of trenches. 



(4) Propagate a fungus disease (Empusa Grylli) for which see Bureau 

 of Entomology, Bull. No. 38, p. 53. 



(5) Plow the beds deeply before using them. 



