26 STRAWBERRY HAND-BOOK. 



small, about one-twenty-fifth of an inch long, and of a 

 yellow color. They eat of the stigmas, and the injury seems 

 to consist largely in preventing the fertilization of the 

 blossom. 



Thorough spraying with a strong decoction of tobacco 

 seems to be the only remedy, (one pound of tobacco stems 

 boiled 30 minutes in two gallons of water). The thrip 

 readily moves from one plant to another, so that the whole 

 field must be sprayed, and the dose repeated every three or 

 four days. 



Leaf Roller. This is a small greenish caterpillar which 

 operates at the blooming period, by rolling the leaf so that 

 its usefulness to the plant economy is destroyed. It is very 

 easily recognized, and in garden culture the rolled leaves 

 may be picked off by hand and burned. 



Use a Paris green spray early in the season, but do not 

 continue it long enough to endanger the contamination of 

 ripe fruit. Mow the infested beds, and burn the leaves as 

 described for "leaf blight." 



Crown Miner. This is a small white or pinkish grub, 

 about one-fifth of an inch long. It injures plants by boring 

 into the crowns of young plants. It is common in old straw- 

 berry beds. Practice rotation, as insecticides are ineffectual. 

 Care in selecting plants is a precautionary measure, while 

 the best preventive is thorough and frequent tillage. The 

 removal of the mulch as soon as fruiting is over is a 

 preventive measure for many of the evils incident to straw- 

 berry culture. 



