New York Agricultural Experiment Station. 301 



somewhat larger than the eomnioii housefly, her body being mostly 

 yellow. On warm days early in spring these flies appear and deposit 

 their eggs in chains along the veins and midrib on the under side of 

 the leaf. Tn about ten days the eggs hatch into the minute white 

 worms, or rather, larviie. These begin to feed on the leaves, grow 

 rapidly and spread over the bushes, often stripping tlieui of their 

 foilage in a few days. As they grow they assume a light green color 

 and at one stage they are covered with many black dots. When 

 full grown they are about three-quarters of an inch long. These 

 flies do not appear all at once and later in the season another brood 

 is developed so that continual watchfulness is necessary to hold these 

 insects in check. 



Early in the season before the fruit has attained much size, London 

 Purple or Paris Green may be used against these insects, but 

 later it is better to use powdered hellebore, which may be applied 

 even when the fruit is ripening without any fear of rendering the 

 fruit unfit for food. These substances may be dusted on the foliage 

 or applied in the form of a spray. We prefer the latter method, 

 especially if there are very many bushes to be treated. When 

 London Purple or Paris Green is used, mix at the rate of one pound 

 of the poison to from one hundred and fifty to two hundred gallons 

 of water. When hellebore is used mix at the rate of one pound to 

 fifty gallons of water. The applications should be made as soon as 

 the worms, or larvae, are discovered. 



The citrrmd hover is the larva of a small bluish-black moth, hav- 

 ing three bright yellow bands across the abdomen. There is but one 

 brood a year of this insect. The moth lays the eggs on or near the 

 buds and the larva bores down through the pith of the cane. 

 Pruning and burning the infested canes in autumn appears to be the 

 best known way of fighting this insect. 



The four-lined leaf hug, or yellow lined currant bug, is an insect 

 that infests the leaves of the new growth. Slingerland advocates ^ 

 the pruning and burning of the tips of infested shoots in autumn, 

 jarring the insects into a dish of kerosene and water, spraying with 

 kerosene emulsion, 1 to 5, as soon as the red young of the insect 

 (nymphs) are seen in the spring. 



The leaf spot diseases are probably best controlled by spraying 

 with Bordeaux mixture, 1 to 11 formula, f According to Pammel's 



* Bull. 58, Cornell Expt. Station, Oct., 1893. t See Bull, of this Station, No. 86: 110. 



