ENTOMOLOGY AND PLANT QUARANTINE 
9 
The records of the infestation of Anaf^trvpha ludcns in the Rio Grande Valley 
suggest it may be the result of flies coming from Mexico during the winter 
months rather than a continuing permanent population in the area, if such a 
migratory movement occurred this season it evidently reached a peak during 
the first half of February, the incoming flies disappearing by the middle of 
March. The larger number of flies taken during April and May may have 
resulted from larval infestations in February and March. 
Adult and larval infestations are shown by districts in table 1. 
T^VBLE 1. — Infestations of the Mexican fruitfly in Texas, fiscal year 1937 
Adults trapped 
Larval 
Adults trapped 
Larval 
infesta- 
infesta- 
District 
tions 
District 
tions 
Speci- 
Prem- 
(prem- 
Speci- 
Prem- 
(prem- 
mens 
ises 
ises) 
mens 
ises 
ises) 
Mission 
404 
43 
221 
Raymond villa. - 
8 
4 
2 
Mc Allen 
675 
35 
82 
89 
Harlingen 
98 
25 
43 
Edinburg. - 
780 
491 
38 
San Benito 
110 
30 
38 
Pharr-San Juan- Alamo. . 
31 
108 
Brownsville. 
46 
12 
45 
Donna 
760 
29 
36 
85 
Falfurriaa 
75 
10 
9 
Weslaco 
592 
136 
Mercedes 
276 
27 
70 
Total 
4, 714 
349 
1,062 
La Feria 
399 
29 
134 
OTHER SPECIES OF FRUITFLIES TRAPPED 
Other species of Anastreplxa and Toxotrypana are frequently taken in traps 
along with A. ludens. The host of one fly {A. paUen.s Coq.) is known: it is 
Bumelia augustifolia, a noneconomic sapotaceous plant. No local hosts for the 
other flies have been found, and it is believed that the occurrence of these flies in 
this area is likewise the result of a migratory tendency. Flies were taken 
throughout the area, as shown in table 2. 
Table 2. — Other fruitflies trapped in Texas, fiscal year 1937 
AnastTC- 
Anastre- 
Anastre- 
Anastre- 
Other 
Toxotry- 
District 
pha ser- 
pha aci- 
pha pal- 
pha 
Anastre- 
pana CUT- 
pentina 
dusa 
lens 
species Y 
pha spe- 
vicauda 
cies 
Mission 
6 
5 
382 
20 
2 
22 
McAllen 
19 
6 
143 
25 
4 
26 
Edinburg 
7 
6 
1.871 
35 
6 
14 
Pharr-San Juan- Alamo.. 
15 
11 
311 
26 

8 
Donna 
13 
15 
182 
28 
4 
21 
W'eslaco 
35 
11 
486 
29 
5 
15 
Mercedes. . 
7 
3 
277 
10 

8 
La Feria.. 
7 
5 
392 
18 

9 
Rayraondville.. 

1 
270 
4 


Harlinien ... 
6 
4 
553 
12 
1 
3 
San Benito 
9 
7 
209 
7 
2 
3 
Brown'?ville 
1 

179 
5 

1 
Falfurrias 
13 
5 
387 
14 

1 
Total 
138 
79 
5. 642 
233 
23 
131 
GROVE AND PACKING-HOUSE INSPECTIONS 
The purpose of grove inspections is twofold. Inspections are made to deter- 
mine if the fruit is free from larval infestations and also to enforce the sanitary 
provisions of the quarantine regulations. This season the issuance of permits 
to harvest fruit was based upon the condition that the fallen fruit had been 
picked up and properly buried at weekly intervals. Packing houses are in- 
spected regularly to enforce quarantine sanitary requirements and to check 
records of origin of fruit harvested and shipped. 
The monthly summary of these inspections, together with certain infonnation 
relative to trapping and the removal of alternate host-fruit trees, is shown in 
table 3. 
