GARDEN" FLEA-HOPPER list ALFALFA. 7 
petiole and sap is extracted, giving the leaves a bleached appearance 
and often killing them. In extreme cases the stems of the plants 
are attacked in like manner. The greatest amount of damage 
results from the loss of plant sap or juices. The leaves die and in 
many instances drop from the stems and cause the infested plants 
to appear as bunches of stubble. (See figs. 2 to 6.) 
The loss to the crop has been estimated by the writer as high as 50 to 
60 per cent in several severely infested fields where the alfalfa had been 
cut and the cured hay removed. The damage is quite noticeable 
Fig. 4.— White clover showing the effect of injury on the leaves by the garden flea-hopper. 
in the field, since the plants have not the green color and freshness 
characteristic of plants that are uninjured,* and have become 
fibrous, contrasting with other plants of luxuriant growth and 
thrifty condition. The extraction of the plant juices checks the 
growth of the plant, causing it to shrivel up and in a number of 
instances to die. After the crop has been cut and the hay re- 
moved from the field an inspection of the alfalfa field shows that 
a large number of the leaves have fallen from the plants and 
been left lying on the ground, causing a loss of much of the food 
