EXPERIMENT STATION BULLETINS. 311 



REMEDIES. 



The larvae of this insect readily succumb to almost any of the poisons, but 

 unfortunately they appear when the fruit is set. Hellebore may be used if the 

 fruit is not too far advanced, kerosene-emulsion has been used successfully, and 

 there is reason to believe that an ounce of Persian insect-powder added to each 

 gallon of emulsion before diluting, will greatly improve its efficacy. Strong 

 soft-soap has also been successfully used, but it must be borne in mind that 

 each "worm" must be hit to be killed, and that new eggs are constantly hatching 

 out larvae, often demanding a repetition of the spray. 



Apple Leaf-miner. (Tischeria malifoliella.) 



The life history and method of living of this little moth were discussed under 

 apple insects. Unfortunately it works also In blackberry and sometimes be- 

 comes so numerous as to need attention. The mines in blackberry are large 

 and blotch-shaped. There are two broods, one going into the pupal stage in 

 July, and the other in September and October. The late brood passes the winter 

 in the pupal stage in the mines in the fallen leaves, (See Apple Leaf-miner 

 under Apple). 



REMEDIES. • 



As the larvae work entirely under the surface of the skin no spray proves 

 effective against these pests. Much good can be done, however, by raking up the 

 foliage and burning, whenever these conspicuous miners are seen to be present. 

 In small patches it sometimes proves worth while to pick off the affected leaves 

 and destroy them. 



(Anomala undulata.) 



A medium sized shiny leaf chafer, having the form of a June-bug, but very 

 much smaller, dirty yellow in color, marked with black, and about one-third 

 of an inch long. The adult feeds on blackberry, plum, pear, apple, grape, wheat, 

 peas and other plants, eating holes in the foliage. When numerous they have 

 been known to strip the plants. They are occasionally visitors in Michigan, 

 that is, they occasionally multiply to sufficient numbers to become pests. The 

 immature stages are passed in the ground. The grub resembles an immature 

 white grub. 



REMEDIES. 



These pests should respond to a spray of paris-green applied in the ordinary 

 manner when the fruit is not set. When fruit is on the plants, use hellebore 

 or else beat the beetles into dozers as in the case of the rose-chafer. 



INSECTS AFFECTING THE CHERRY. 



INSECTS AFFECTING THE TRUNK. 



The Divaricate Buprestis. (Dicerca divaricata.) 



This is a medium sized beetle with very hard, strong wing-covers and a flat- 

 tened body. The surface is bronzy, and furrowed, the spaces between furrows 

 being highly polished. This insect bores into living wood much as does the 

 flat-headed apple-tree borer. It works in cherry and most of our stone fruits 

 beside a number of forest trees. The remedies are the same as those for the 

 flat-headed borer of the apple. 



INSECTS AFFECTING THE FOLIAGE. 



The Cherry-tree Plant-louse. (Myzus cerasi.) 



A large, black, polished plant-louse that works on the young shoots and tender 

 foliage of the cherry, often appearing in very great numbers. They multiply 

 rapidly, sometimes covering the twigs and young fruit, and secreting a sticky 

 sweetish liquid called honey-dew. This attracts ants, yellow-jackets, flies, etc. 



