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Florida Entomologist 
Official ae of the Florida Entomologteal. = 
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VOL, VIL ° FALL NUMBER No. 2 
OCTOBER, 1923 
CITRUS CONDITIONS IN THE RIO GRANDE VALLEY AND 
THE SATSUMA SECTIONS OF ALABAMA TOGETHER 
WITH ADDITIONAL NOTES ON SAN JOSE SCALE 
SITUATION IN NORTHWESTERN ARKANSAS 
By 
W. W. YOTHERS, Bureau of Entomology* 
Orlando, Florida. 
INTRODUCTION 
The visit to the Rio Grande Valley was made under the aus- 
pices and on the invitation of the Extension Division of the 
Texas A. & M. College. A year ago they conducted a citrus school 
and it met with such success that it was decided to hold another 
one this year and it was held from June 25th to 30th inclusive. 
The object of the school was to give the citrus growers informa- 
tion regarding the diseases and insects and methods for their 
control. During the week somewhere around a thousand people 
attended the lectures at the various places. 
General Conditions. The soil of the Rio Grande Valley is very 
fertile and citrus trees make a marvelous growth. Nursery 
trees one year old are much larger than are trees of the same 
age in Florida. The average 4-year old grove was as large as a 7 
or 8-year old grove grown uder the average Florida conditions. 
In fact some of the trees planted 20x20 feet, 4 years ago, have 
branches which now meet. 
Owing to the uneven distribution of rainfall throughout the 
year it is necessary to irrigate the trees in order to insure 
proper growth. The water for this purpose is pumped from the 
Rio Grande. As yet the gravity system is not in operation but 
*Paper read before the August meeting of the Florida Entomological Society. 
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