EXPERIMENT STATION BULLETINS. 



327 



ATFECTINQ THE TWIGS. 



The Peach Twig-borer. {Anarsia lineatella.) 



An insect of minor importance with us, is the peach twig-borer. It works in 

 Michigan on the peach and is said to attaclt other fruits also in California. Al- 

 though several broods are raised each year, most of the damage is done by the 

 brood which matures in late April and early May. The larvae bore into the new 



Fig. 49. — Peach-twig-borer," after Marlatt, Farmer's Bui. No. 80, U. S. Dept. of Agr. Div. of 



Entomology. 



growth, killing the terminals and injuring the branches, sometimes destroying a 

 considerable portion. Later broods are said to feed in the bark and in the fruit 

 stems, sometimes boring into the fruit, the last brood tunnelling while very 

 small into the thickened bark in the axils of small twigs. Here they are said to 

 make minute tunnels lined with silk. In this condition the winter is passed and 

 this is the brood which comes out in the spring and attacks the twigs. 



EEMEDIES. 



Experiments in California by Mr. Warren T. Clark,* seems to show that the 

 twig-borer may be controlled by a spray of lime, salt and sulphur, applied just 

 as the buds commence to swell, but before they open in the spring. The spray 

 catches them during their migration to the new growth. 



Buffalo Tree-hopper (see Insects affecting the apple). 

 Tree Crickets (see Insects affecting the blackberry). 



AFFECTING THE TBUNK. 



Flat-headed Apple-tree Borer (see Insects affecting the apple). 

 Divaricate Buprestid (see Insects affecting the cherry). 



AFFECTING THE BARK. 



The San Jose Scale. {Aspidiotus perniciosus.) 



One of the worst fruit and shade-tree pests with which we have to contend, 

 is the San Jose scale, feeding, as it does, on a long list of plants and trees, 

 and bringing about such grave results, it always enforces serious consideration. 



Individuals belonging to this species are minute. They are protected by a 



*Bul No. 144, Cal. Agr. Exp. Sta. 



