﻿THE PINK BOLLWOKM 25 



In the Slireveport district 10 fields were found infested in the crop 

 of 1920, a result of seed shipped from the Cameron district prior to 

 the discovery of infestation there. A noncotton zone was proclaimed 

 in 1921 and continued through 1922, and there has been no recurrence 

 of infestation. The area was cleaned up in 1920 and again during 

 1922 and 1923. 



In the Mesilla Valley in New Mexico 6 fields were found infested 

 in 1920. A clean-up campaign was begun, but it was discontinued 

 when the extent of the infested territory in this district and in the 

 adjoining El Paso district was determined. The infestation has 

 continued. 



In the El Paso Valley 14 fields were found infested in 1920. A 

 clean-up campaign was begun, but it was discontinued on account 

 of the general infestation in this and the adjoining Mesilla Valley 

 and the proximity to Mexico. The infestation has continued. 



The Carlsbad infestation was found in 2 fields in 1920. No clean- 

 up was undertaken, and the infestation reappeared in 1921. There 

 was no recurrence, however, in 1922 or 1923. 



The Ennis, Tex., infestation, consisting of 5 fields, was found in 

 1921. It originated with the shipment of 14 carloads of cottonseed 

 from New Mexico before infestation had been found there. The in- 

 fested area was cleaned up in 1921, 1922, and 1923, and intensive 

 scouting has not disclosed any reinfestation. A noncotton zone was 

 maintained during 1922, the clean-up work for that year being con- 

 ducted in the fields immediately outside of the small zone necessary 

 under State law. 



The Marilee infestation, consisting of two fields of the crop of 

 1921, originated in the reshipment from Ennis to Marilee of some 

 of the New Mexican cottonseed which caused the infestation at Ennis. 

 The area was cleaned up in 1921 and a noncotton zone was maintained 

 during the following year. The area was cleaned again in 1922 and- 

 1923. No reinfestation has occured. 



The detailed records of the -amount of scouting performed in 

 ea<;h of these districts are given in Table 2 and the locations of the 

 several districts are shown in Figure 11. 



SCOUTING OUTSIDE OF KNOWN INFESTED DISTRICTS 



Tlie most important consideration connected with the attempt 

 to control the pink boUworm in the United States has been whether 

 all infestations have been discovered. A veiy large amount of 

 scouting has l)een done in regions outside of the various areas in 

 which the insect has \yeen found, including numerous points to which 

 possibly infested material has ))eeii shipped. Whenever an infesta- 

 tion has been found the shipments for the three preceding years 

 which could possibly have introduced the insect have been traced 

 to their destinations and cai-efiil scouting conducted. Of course, 

 much attention lias been giv(;n to scouting iniinediat(^ly outsider of the 

 various noncotton zones and legnlated zones. Attention has been 

 given to numerous repoits of the occuirence of the insect which have 

 been due to misidentifications. 'ITie routes of traffic from the 

 Mexican border and the entire Mexican frontier have been thor- 

 oughly inspected. Table 3 shows the amount of this scouting in 

 the various States where it has been done. 



