<n POG3 
early cotton planted April 19-20. The-average: check yield in these 
‘three tests was 1,409 pounds of seed cotton per,.acre. The three 
plats treated with calcium arsenate shoved an average gain of 86 
pounds of seed cotton per acre, or 6.1 ae r, In these three tests 
treatments were started on one plat on Ar st 3-and-on the other two 
on August 9. At the time treatments were ‘started the plents had set 
a large crop of bolls and the Pree Vneee of treatments was to - 
protect the late bolls from weevil danage. he treated plats roccived 
‘on the averege 3 effective: applications of catalan arsenate. The 
average cost of treatment in this series was ee 46 per acre and the 
treatment showed an averaze profit of only $. 43, per acre. Four tests 
were conducted on late cottom planted May 2426, The average check 
yield for these four experiments was 1,028 pounds of seed cotton per 
acre, The average gein for the treated plats was 162: pounds of seed 
cotton ‘per acre, or oan incréase of 15.8 percent. The created plats 
in this series received on average of 4.5 applications of calciun 
arsenate. The treatments were started on August 19 when the infes- 
tation reached 10 percent. The average cost of treatment in this 
series was $2.20 per acre and the treatments showed an average profit 
of only $1.46 per acre. The average check-plat yield in5 experiments 
located ‘on sintlar soils at Eufaula in 1932 was 820 pounds of seed 
cotton per acre and the average gain for the calcium arsenate treat- 
ment was 502 pounds of seed cotton and the profit, $5.24." 
~The 1933 tests again emphasize the advantage, when boll weevils 
are present, of planting cotton éarly. The average yield of two un- 
treated check plats planted April 19-20 was 1,409 pounds of seed 
cotton per acre, whereas the average yield on three similar checks 
planted May 24. 26 was only 1,028. aounis, The plats planted late 
were on equally: Sie soil and were entirely surrounded by the early 
planted cotton. An experinent was conducted in which-the weevil- 
Pinfested forms were collected during the first 5 weeks of the season 
aad “placed in screen-wire cagés. Tie cages were distributed along 
the center of the plat and were so constructed that the parasites 
could escape but the weevils could not. Examinations showed that 
parasites were more abundant near the cages than at other points in 
the field and were far more abundant in this field-than in any other 
field in this section, but the increase in yield-was not sufficient 
‘to pay for the cost of collecting the squares. 
’- Groton destruction project terminated in Calhoun County, Tex. -- 
‘K,. P. Ewing, Port Lavaca, Tex.,:reports that work on the State — 
C WA'project for: the control of the cotton flea hopper. was termin- 
ated on February 15. He sayst- According to determinations made by 
the supervisors, a total of 10, 014 acres of croton was destroyed in 
the county from December / to February eats l2/ acres in December, 
4,089 in January, and 1,798 in February. This destruction was on 
