- 125 - ' 
in the same district, and is. doing damage and is present in 
destructive riumbers over an area of 2,000 or 3.000 acres cut of 
a total of about 10,000 acres of tomatoes, but is being held in 
che 4 ck by a community effort under the direction .-of -the Fuerte • 
./ Valley Vegetable Growers Experiment "Station, calcium cyanide dust 
' being used. Attempts to breed out egg parasites from infested 
tomato 'leaves in the Fuerte 'VaMLey "have -thus far been unsuccess- 
ful. Although several thousand acres of tomatoes "are grown 
between the Fuerte Valley and., the.'santiago^ailey in Kyarit 
. ab.out 350 miles farther _s,outh,_no ^serious damage from the garden 
'fleaho'pper has' been- observed or reported cturing the past season. 
At Santiago, however, one outbreak has been reported. Killing 
frosts occurred 'in /the Ftierte 'Valley early *in January. Old 
tomato plants from which first pickings had" been made were killed 
back in most fields one-third to one-half "of the length of the 
stems fronrthe tips, while young plants which base no fruit were 
as a rule uninjured.. The minimum temperature recorded at the 
United Sugar Companies at Los Mochis was 35 Q » while at the 
Vegetable Growers Experiment Station the minimum -recorded was 
3°°.. Looser temperatures doubtlessly occurred in the fields. The 
unusually cold - period lasted len days.' TThile the multiplication 
of the.fleahoppers wa.s checked by. this cold spell, the effects 
were not as noticeable as in the .case of the tomato plants. In 
. general it is evident.. that in,'the w-inter -vegetable -growing 
districts on the \7est Coast "of Mexico, low^ temperatures are not a 
factor influencing the fluctuations' in the abundance of the garden 
fleahopper. This is more likely to be due to the egg parasites 
and possibly to fungus diseases. 
POTATO BEETLE -( Lept inotarsa deceml ineata Say) 
Virginia Herbert Spencer (April 29): Several complaints from the eastern 
shore and Norfolk trucking districts of adult Colorado potato 
beetles- onthe early, potatoes have been received. These insects 
seem much more numerous -than usual, at this time 'of 'the year. 
•Torth Carolina F. Sherman (May IS): Reports from various sources indicate that 
tin is insect is more- abundant' -than usual -.in the early-crop potatoes 
of eastern part of State. 
Mississippi R. VT. Harned (May 23); . ^The. Colorado potato beetle was reported 
damaging tomatoes at Summit, Miss., on May 20. 
POTATO FLEA- BEETLE- (Epitrix cucumer is Harr. ) 
New York C. R. Crosby and assistants (May l6): Moderate infestation has 
been" noted fairly generally in Nassau County. . % - - 
CORN EAR WORM ( Heliothis obsoleta F ab.) 
Mississippi L" V." Harned (May 23): The tomato fruit worm was reported damaging 
tomatoes at Summit,' Mi-ss.-;, on May 20. 
