32 
ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE, 1934 
A total of 18,636 specimens of Anastrepha were taken on the Mexican side of 
the Rio Grande during the fiscal year. Adult A. ludens were trapped in Mata- 
moros, Reynosa, and Nuevo Laredo; A. serpentina, A. striata, and A. pallens 
in Matamoros; and A. f rater -cuius in Reynosa. The A. serpentina, A. striata, 
and A. f rater cuius were the first adults of these species to be trapped in the Mexi- 
can border towns since the work has been in progress. 
All larvae were recovered in Matamoros. Of the imported fruits, mangoes 
continued to be most heavily infested, 10,669 larvae of A. ludens being taken from 
this fruit in June alone. The number of larvae of A. ludens taken from imported 
oranges showed an increase over previous years. Larvae of A. striata were 
taken from guavas. A. serpentina was taken from peaches, and in all probability 
from apples, mameys, and quinces, the characters of the larvae from these 
latter fruits being very similar to those of the larvae from peaches. The determin- 
ation of larvae from peaches originating in Ramos Arizpe, Coahuila, Mexico, as 
A. serpentina, was made by the Mexican inspector in Matamoros by rearing 
adults from the infested fruit. This established a new host for this species in 
Mexico and also a new locality infestation. A number of Anastrepha larvae 
definitely determined as not being ludens were taken from Manila mangoes shipped 
to Matamoros from Vera Cruz. 
Inspection of local fruit in Matamoros in July resulted in the taking of 121 
larvae of A. ludens in sour oranges on 2 premises. The trees on these premises 
were stripped of all fruit and sprayed with a mixture of nicotine and molasses. 
The nicotine-molasses spray was also applied to the trees on the 24 premises on 
which 81 adult A. ludens were taken during the year. No fruit in stages sus- 
ceptible to larval infestation was available subsequent to the September hurricane. 
The danger of reinfestation of Texas groves by infested fruit reaching Mexican 
border towns is exemplified by the taking of an adult A. ludens in a trap in the 
brush on the banks of the Rio Grande directly across from Reynosa; by the taking 
of several adult flies in the village of Hidalgo, also across the river from Reynosa; 
and by the taking of an adult A. striata in the Mission district. These findings 
undoubtedly originated in infested fruit shipped to Reynosa. The details of 
the fruit-fly findings in the Mexican towns along the border are shown in table 11. 
Table 11. — -Infestations of Anastrepha in Mexican border towns, fiscal year 1984 
Local fruit 
Larvae found in imported fruit— 
'3 
aa 
o 
a 
a 
a 
a 
3 
,o 
§ 
ft 
3 
Adults trapped 
M 
a 
<s 
o 
3 
o 
X 
a 
X3 
a 
3 
>2 
<D 
03 
t> 
a) 
>1 
ft 
< 
c3 
08 
s 

o 
bJO 

C3 
0) 
a 
® 
bfi 
3 
U 
O 
si 
o 
o 
a 
"3 
<y 
a 
o 
a 
a 

Month 
1 
B 
CO 
a. 
"3 
o 
July 
27 
1 
121 
~3~5~ 
2 407 
3 11 
'123 
567 
l 
9 
.... 
1 
3 56 
195 

155 
560 
119 
4 
14 
155 
November 
1 
5 
5 
2 
3 
2 
2 
36 
2 1 
22 
2 6 
2 15 
562 
1 
127 
316 
31 
February.. 
1 
32 
March.. 
.... 
l 
l 
1 
18 
500 
10, 669 
4,201 
23 
15 
156 
52 
518 
May 
255 
1,050 
1 
11,083 
34 
.... 
5,343 
Total . 
83 
1 
3 
] 
1 
121 
5 
431 
15, 397 
16 
1,076 
138 
56 
1, 305 
2 
18, 636 
1 Specimens taken from box in which fruit was carried from market to office. 
2.1. striata. 
3 Probably A. serpentina. 
