10 
ANNUAL REPORTS OF DEPARTMENT OF 
emetic continues to be more effective than others. Allotments from Bpecial 
funds, including those received from the Emergency Relief Administration in 
Puerto Rico, provided for constructing and equipping special rooms for experi- 
ments to determine the effect of high and low temperatures on the Immature 
stages of fruitflies In various kinds of fruit This equipment was ready for 
use late In the year. The tests conducted al 32 F. suggest thai the Immature 
stages of these fruitflies are killed at this temperature as readily as are 
those of Hi" Mexican and the Mediterranean fruitflies. 
In the Canal /one the habits of various specie- of fruitflies thai occur 
naturally in that locality have been studied. Adults of A. 81 / /" ntinn. a species 
that usually confines it* attacks to sapotes, have been reared from oranges 
purchased in the market, Indicating that this form attacks citrus fruit under 
natural conditions. 
MEXICAN FRUITFLY CONTROL 
INFESTATIONS 
ADULTS 
Traps have become increasingly imporant in determining the extent of adult 
infestations of the Mexican fruittly (Anastrepha ludefU Loew) in Texas and 
in Indicating probable larval infestations. Through the use of these traps 
adults were taken monthly from September through May from 190 premises. 
The 256 specimens trapped represent a decrease of 115 from the previous 
year's total: however, there was an increase of IT in the total number of 
premises Infested. The length of time over which adults were trapped also 
increased 2 months over the previous year, as flies were trapped as early as 
September in 1985. 
A< in former years, the greatest concentration of infestations was in the 
western half of the Rio Grande Valley from La Feria toward Mission. This 
has been observed not only this year hut also in previous seasons, and the 
same condition holds for all other speeies trapped a> well as for Annstn jihu 
ludens. 
Included in the total number of adults trapped are Lii from 11! locations j n 
northern Hidalgo and Brooks Counties and 8 from 4 premises in Starr and 
Weiih Counties. 
Trapping results throughout the year are presented in table 1 
Tahlk 1. — Fruitflies tr<i}>i><<l in Terns, fiscal year /.''•-''; 
Anastrfpha 
ludens 
Anastrcpha 
terpi ntina 
AnwtTtpha 
acid us n 
Irepk* 
Anattrepha 
sp. P 
District 
Adults 
Prom- 
ises 
Adults 
Prem- 
ises 
A- lulls 
Prern- 
Adult? 
Prem- 
Adults 
I'rem- 
Mission 
■j:. 
27 
83 
20 
22 
21 
28 
7 
8 
23 
19 
•Ji 
14 
20 
1'.) 
•J I 
'.' 
8 
\-: 
i 
15 
IS 
22 
17 
20 
37 
17 
8 
l 
18 
16 
I 
t 
n 
12 
is 
13 
17 
16 
18 
:< 
1 
r: 
12 
t 
1 
6 
Id 
12 
14 
18 
B 
1 
1 
8 
i 
2 
4 
5 
8 
14 
8 
12 
8 
1 
1 
1 
a 
a 
2 
1 


1 
(> 
n 
ii 


ii 

II 
II 
l 

i 



«> 


(I 
n 
9 
17 
11 
- 
18 
14 
16 
M 
1 
11 
McAllen .- 
8 
11 
Phan 
14 
- 
14 
18 
•> 
10 
13 
16 
Palfui northern 
1 
1 
256 
19Q 
203 
108 
'.'7 
85 
4 
4 
215 
152 
. 
