New York Agricultural Experiment Station. 353 



of copper carbonate. Directions for preparing this and tbe Bor- 

 deaux mixture are given in article 4 on Fungicides and Insecticides. 



CuRcuLio. — This insect etings the cherries, causing the fruit to 

 become wormy. It is the same insect as the plum curculio, and is 

 discussed more at length under the subject of " Plum Curculio," on 

 a subsequent page. 



Remedy. — The curculio is commonly opposed in cherry orchards 

 by one or two applications of Paris green or London purple at the 

 rate of one pound to three hundred gallons of water. Two or three 

 pounds, at least, of unslaked lime should be added for every pound 

 of the poison. Slake the lime and add to the mixture the same as 

 in making Bordeaux mixture. The poison may be mixed with the 

 Bordeaux mixture if desired, as stated on page 366. Make the appli- 

 cation immediately after the blossoms have fallen and a second 

 application about ten days later. 



Slug. — This insect also infests pear trees, and it is discussed more 

 fully under the heading of " Pear Slug " on a subsequent page. 

 The remedies to be used are there given. 



Currant. 



Leaf Spot. — Two of the fungous diseases which cause spotting 

 of currant leaves have been successfully treated with Bordeaux 

 mixture by Prof. Pammel.^ The spot diseases are usually seen to 

 some extent each year and in some cases their attacks are so severe 

 as to nearly defoliate the bushes. Judging from the experiments 

 thus far tried, the spraying should begin soon after the fruit sets 

 and continue at intervals of about two weeks till the fruit begins to 

 color. One or two applications may be made after the fruit is har- 

 vested if thought necessary. 



AVoEMS. — The imported currant worm, which is the larvte of a 

 sawfly, is the most injurious insect that feeds on the currant bush. 

 The fly, as described by Saunders, resembles the common house-fly 

 somewhat, the female being larger and the abdomen is mostly 

 yellow. These flies appear early in the spring on warm days, and 

 deposit their eggs on the under side of the leaf, in chains along the 

 veins and midrib. The eggs hatch in about ten days, when the 

 larvae appear as minute white worms. They at once begin to feed 



3 Bulletin 17, Iowa Expt. Station, pp. 419-431 ; Bulletin 20, pp. 716-718. 



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