Insect and Disease Control 249 



extent in some sections. As a peach insect it has been dis- 

 cussed by Weldon.^ Unhke the brown-mite, this insect 

 passes the winter in the adult form, hibernating in the soil 

 close to the trees on which it has been feeding or under 

 rubbish that will furnish protection. It does little damage 

 after the middle of August under the conditions in the Grand 

 Valley in Colorado, migration to the ground having largely 

 taken place by that time. 



It works mostly on the foliage, where its effect is not un- 

 like the injury caused by the brown-mite, except that the 

 injured leaves are inclined to turn yellow in spots. The 

 insect is greenish in color while feeding on the leaves, turn- 

 ing orange or red when migration occurs. 



The red-spider, unlike the brown-mite, spins a web on 

 the leaves or branches, where it may be located, thus making 

 its presence more conspicuous than it would otherwise be. 



Methods of control. 



Sulfur, whether dusted thoroughly on the foliage or ap- 

 plied as a spray in water, gives successful results. If ap- 

 plied as a spray, the sulfur should be very finely pulverized 

 or screened, and if a small amount of soap is dissolved in it 

 a better mixture is secured. 



Oriental peach-moth (laspeyresia molesta) 



This insect appears to have been introduced within recent 

 years and is not only new to this country but a species new 

 to science. Its nearest well-known relative in this country 

 is the common codling-moth — the familiar cause of "wormy 

 apples." Its entomological position and economic impor- 



1 Colo. Exp. Sta. Bull. 169. 



