
TRUCK-CROP INSECT INVESTIGATIONS 
F, H. Chittenden, Entomologist in Charge 
During the past month this office nas received a large number of 
jetters from growers with regard to the control of the Mexican bean 
Ddectle. It is particularly worthy of note in cormection with these that 
many complaints are being received from localities in which toe bean 
beetie was difficult to find last year, excent by close inspection. The 
injurious range of the pest is plainly being extended to include the 
eastern half of Tennessee, and reaches to one ner point in dentucky. 
From the fact that the attention of growers is oeing attracted to infuz 
by this pest, it is evident that « large section of additional cowmtry 
will be damaged during the present summer, 
W. H. White, scientific assistant of the Washington office, re- 
cently completed a trip to the eastern shore of Virginia where an out- 
break of the potato aphis (Macrosiphum Solanifolii) was investigated. At 
the time of Mr. White's visit, most of the serious Gamage had been ac-~ 
complished in some cases, reducing the crop yield one-half, according to 
estimates of growers, In fields waere the insects were abundant just 
before the potato had blossomed, the young tender shoots head, in many 
cases, been completely killed, Control by natural enemies and fungous 
diseases was doing much to reduce the numbers of the aphids. Two success- 
ful applications of a three per cent nicotine dust were made to a field 
at the Olney branch of the Virginia Truck Experiment Stetion. 
Mr. White has also recently visited Baltimore, Md., to investigate 
an outbreak of the corn earworm on cannery beens. ‘The actual jamaze to 
the infested fields was not great, but a factor of material importance to 
bean growers and canners of that section was the fact chaz the larvae 
sometimes enter the pods, where they remain and eventually find their. 
way into canned beans, even wmder the most careful handling. 
C. F, Stahl, scientific assistant of the Riverside, Calif. sabora- 
tory, has recently completed a trip through the beet sections of Cali- 
fornia, Utah, Nevada, Idaho, Washington, and Oregon to investigate injury 
by the "curly-top" disease, transmitted by the leafhopper Tuvettix tenelia. 
R. E. Campbell, scientific assistant of the Alhambra, Calif., ue 
laboratory, attended the meeting of the western branch of the Association 
of Economic Entomologists at Sait Lake City, Utah. 
: Pe me eo 
D. E. Fink, entomological assistant of the Riverton, N. J., lab 
oratory, has been investigating truck-crop pests in the vicinity of 
Rochester, N. Y. 
B. L. Boyden, scientific assistant, in charges of swest-potato weevil 
eradication in Florida, has transferred his headquarters from Daytona te 
2 = CY * sa -~4 - WM. tr 
Tampa. Eradication headquarters wili stili be maintained et Macclenny, 
Fla. 

