76 
villi-, in Cameron County. Bloom inspection was immediately begun 
in the L939 cotton 'Tup. and by June 30, L2 infested fields had been 
ted in ( *an u 'rnn County, and 1,885 specimens of the pink bollworm 
had been found through bloom and boll inspect ion, 1,836 of these speci- 
mens coming from -i heavily infested fields. These findings indicated 
i hat a n inch heavier infestat ion was present in Cameron County in the 
crop than existed during the previous season. Considerable 
inspection of this type gave negative results for the other three regu- 
lated counties as of June 30. in the Matamoroa district L6 specimens 
<>f the pink bollworm were found through bloom inspection during 
May, l>nt unfavorable weather prevented a sufficient amount of in- 
spection to indicate the degree of infestation in that district. 
CONTROL PROGRAM IN THE BIG BEND AREA 
Owing to the extremely heavy pink' bollworm infestation in the 
l'.>:'>7 cotton crop in the Big Bend area of Texas and Mexico. Depart- 
ment of Agricull nre authorit ies of the United State- and of Mexico, in 
cooperation with the State Department of Agriculture, evolved a 
program, referred to as the tc 2-year plan," with the objective of ma- 
terially reducing the pink bollworm infestation in the Presidio- 
Ojinaga area by the early planting and harvesting of the 1938 cotton 
i rop. followed immediately by the clean-up of fields; delayed plant- 
ing of the 1939 cotton crop; and the elimination of all stub or volun- 
teer cotton in the spring of VXV.) so that no fruit would he available 
to emerging pink bollworm moths before the maturity of the main 
cotton crop. 
A Texas State proclamation was issued in January 1939 prohibit- 
ing the planting of cotton in the affected area until April 20, and a 
similar proclamation was issued by the Mexican Department of Agri- 
culture for the Ojinaga district. This uniform planting date was 
observed very closely on both sides of the Bio Grande, a- was also the 
destruction of all stub cotton. It i.-^ believed that the spring emer- 
gence <>f pink bollworm moths in that area was practically over by 
June 10. and no fruit sufficient to maintain and propagate the pink 
bollworm was found present on cotton plantings before June 17. 
thus creat ing a host-fret 4 period of several months* duration. Inspec- 
tion of material from the 1939 crop is awaited with interest. 
REINFESTATION IN ARIZONA 
In the fall of L938 an infestation of the pink bollworm was found 
in the eastern end of the Salt River Valley of Arizona in Maricopa 
County, in practically the same Location where the first pink bollworm 
infestation was discovered in 1929. Also, a light infestation was 
again found in the Coolidge district of Pinal County early in 
November. 
A- a result of these findings, Federal Quarantine No. 52 was revised 
effective November 17, L988, to add to the lightly infested areas in 
Arizona all of Maricopa County and that part ^\' Pinal County not 
heretofore within the regulated area. With the additional area in- 
volved by these new findings a light general infestation of the pink 
bollworm extended from Tubac, in Santa Cruz Countv, northward 
