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COTTON INSSCTS 
Calcium arsenate for thurberia weevil on cotton.--T. P. Cassidy, 
Tucson, Ariz., reports that infestation counts made in the field in- 
dicate that calcium arsenate gives fair control of the thurberia weev- 
il (Anthonomus grandis thurberiae Pierce) on cottonin Arizona, The 
test plats were located on the Papago Indian Reservation at Fresnal, 
Ariz. The first three applications of calcium arsenate were made be~ 
tween August 31 and September 12. On September 15, 18.33 percent of © 
the bolls on the poisoned plat were infested, as compared with 39.83 
percent infested in the check plat. 
Hemipterous insects on cotton in Arizona.~Hemipterous insects 
probably cause more actual L damag e to cotton in Arizona than any other 
insects. Several species that cause similar injury by puncturing the 
bolls are involved. Preliminary studies by T. P. Cassidy of the dan— 
age caused by these insects in different cotton fields in the Buckeye, 
Chandler, end Sacaton areas indicate a probable succession of host 
plants, as has been found with similar insects affecting various crops 
in other sections of the country. Infive fields where infestation 
records were made between October 24 and November 2 the percentages 
of bolls punctured was 46, 35, 28, 23, and 3. The field with only 3 
percent infestation is located on a desert mesa with very few other 
plants growing in the vicinity, whereas the other fields are located 
in cultivated areas surrounded by crops of cotton, alfalfa, wheat, 
hegari, etc. The infestation, as indicated by punctured bolls , did 
not become serious in these fields until about August 1, when there 
was apparently an influx of hemipterous insects into the cotton fields, 
where they were very abundant during August. By September 5 they 
seemed to be disappearing and early in October had practically dis- 
appeared from the cotton fields. As wheat in that section is harvest— 
ed late in June and early in July and it is the practice to take the 
water off the alfalfa and graze the fields during August and Septem— 
ber, it is possible the appearance of the hemipterous insects in the 
cotton fields early in August is due to their migration from these 
other crops when the crops are harvested or go down from lack of water 
or from grazing, or both. 

Abundance and Condition of Boll Weevils Eutering Hibernation this Fall. 
Reports have been received from field stations and State officials 
on the abundance and condition of the boll weevils entering hiberna- : 
tion this fall from six States located in different parts of the Cotton © 
Belt; 
Oklahoma.--H. C. Young, Eufaula, reports that all of the cotton 
in that vicinity was killed by frost on November 8, 4% days earlier than 
in 1932. Weevils were difficult to find in the fields by November 14, 
