BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
11 
Table 1 shews, for the years 1935-39, the number of infestations in 
relation to the number of flies trapped and the date the harvesting 
season closed. 
Table 1. — Infestations of the Mexican fruitfiy in Texas, 1935-39 
Fiscal year 
Flies 
trapped 
Larval in- 
festations 
Harvest- 
ing season 
closed 
Fiscal year 
Flies 
trapped 
Larval in- 
festations 
Harvest- 
ing season 
closed 
1935 . 
Number 
367 
251 
4,714 
Number 
30 
5 
1,062 
Apr. 2 
Mar. 31 
Mar. 31 
1938 
Number 
i 712 
» 13, 687 
Number 
218 
Apr. 30 
1936 - 
1939.. 
H Mav 15 
3 2,111 V 
* 
1 79 outside regulated area. 
* 314 outside regulated area. 
* 9 outside regulated area. 
* For grapefruit. 
» For oranges. 
STERILIZATION 
Although the infestation within the regulated area was higher dur- 
ing the spring of 1939 than in any other season, at no time throughout 
the year was the harvesting and shipment of fruit curtailed or seriously 
delayed. This was due to the fact that unrestricted shipments were 
permitted after the fruit had been sterilized. 
Two types of sterilization were used in 1939, but the high-tempera- 
ture method accounted for more than 99 percent of the fruit treated. 
The season opened with only a few rooms for high-temperature ster- 
ilization in operation, but more were added rapidly when infestations 
developed, and by the time the season closed 45 rooms were in operation, 
with a daily capacity equivalent to 87.2' carlots. Table 2 lists the 
amount of fruit sterilized monthly by the two approved methods. 
Table 2. — Citrus fruit sterilized in Texas 1 
Month 
By high-temperature 
method 
By low- 
tempera- 
ture 
method 
Month 
By high-temperature 
method 
By low- 
tempera- 
ture 
method 
Grapefruit 
Oranges 
Grape- 
fruit 
Grapefruit 
Oranges 
Grape- 
fruit 
Tons 
February 205.00 
Tons 
Tons 
Tons 
12, 647. 00 
Tons 
2.25 
Tons 
2.08 
4, 012. 75 
27, 285. 25 
Total 
April 
44, 150. 00 
2.25 
2 08 
1 Total equivalent carlots of fruit sterilized: 3,081.2. 
CANNING PLANTS 
The canning of grapefruit has continued to occupy an important 
place in the citrus industry and has become a factor of considerable 
importance in the enforcement of the provisions of Quarantine No. 
64. The season's operations amounted to 12,272 equivalent carlots 
of grapefruit and 35 equivalent carlots of oranges. 
SHIPMENT OF FRUIT 
Commercial production of fruit in the regulated area (table 3) 
increased 12,621 equivalent carlots over the production of the pre- 
