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‘THE POTATO LEAFHOPPER AND ITS CONTROL. 
J. E. Duptey, dr. 
Scientific Assistant, Truck-Crop Insect Investigations. 
CONTENTS. 
; Page. Page 
BPBIPSCE GION. 225s ce i)-c-Sceteetas setae ses ece Sal) MOGI EEGs Stat setts naa Sen mictata, diaerate winches ne miata oe 10 
BE MOP UG OM crys fe fee antes ieicte aistmwicl= =pisisioes=)=/ Ave) NeaTIMOM CMOS es os 5 aan oot ane ae ae 11 
economic importance: .-..-.-..22------s--=--+ 4 | Selection from resistant vines ..-.........-.--- 12 
BEeAneNISLOLY voce... te tanececa dee eo ecism ae ee 4 | Control_of the leafhopper and prevention of 
Injury caused by the potato leafhopper....-.-. 5 U6 (ny cog and Aen ee ee pec ee nee soe occ 13 
BSdINPANTUNY) oo. 2 se ey ecas seem ae ee cis & Use of Bordeaux mixture ......-.----.--- 13 
{ PET OO DERDUEI (-e.ac seinen toe de es tee 5 | Summary of control measures. .....-..--.----- 16 
The potato leafhopper 1 is one of the most important insect 
enemies of potato in the United States. Serious outbreaks have 
occurred periodically in certain sections 
since the early eighties, and about 
1896 this insect became known as a 
dangerous menace to the potato crop in 
the Middle and Eastern States. This 
leafhopper attacks a large number of 
plantts and may at times become injuri- 
ous on several of them. 
The feeding injury, although severe, is 
not nearly as serious as the diseased con- 
dition called “hopperburn” which it 
transmits to the plants on which it feeds. 
It is necessary to recognize and to 
fight this leafhopper to prevent the 
loss of large acreages of potatoes from 
“hopperburn.”’ 
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DESCRIPTION. 
Shevadult or full-srown. leathopper 7% —Adultwotato lestionpen.» Creatiy 
(fig. 1 and fig. 2, G) is a very small, a 
pale green insect, about one-eighth of an inch long, with large, white 
eyes and amore or less distinct H on its body between the head and 
base of the wings. There are six roundish, white spots above this H 
and three white, wedge-shaped spots below it. Adults fly and hop 
readily when disturbed. 
1 Empoasca mali LeB., order Hemiptera, family Cicadellidae. 
50683°—21—Bull. 1225 3 
