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‘arely be greater than 2 inches. As just noted, the weevils readily work 
out from these depths. 
From a further careful field study it was noticed that not only did 
this shallow plowing under of the fallen squares fail to destroy them 
in most cases, but conditions were often such as to make this shallow 
covering of loose soil over them a positive advantage. In those sec- 
tions where cotton does not grow rank, and permits the direct scorch- 
ing rays of the sun to strike the soil between the rows, it was found 
that many fallen squares with weevil larvee in them were so thoroughly 
heated that the larvee perished. Earlier in the season the industrious 
little red ants are busily engaged in search for food and they often eat 
into the infested squares and destroy the larve or pupe inside. Now 
if these squares be plowed under, the shallow covering of earth takes 
them out of reach of the friendly little ant, and also away from the 
scorching. hot summer suns to a cool, moist place underneath. As soon 
as the larvee mature in the plowed-under squares, the weevils which 
they produce find little trouble in coming to the surface and escaping. 
The process is therefore a positive injury under these conditions and 
must be condemned. 
Conditions which afford shade, coolness, and sufficient moisture are 
ideal ones for the full development of the weevil. Hence, rank- 
growing varieties of cotton are not advisable, since on the rich bottom 
lands, where moisture is better conserved and cotton grows so rank as 
to completely shade the ground, the weevils are more plentiful and 
destructive than in the prairie and uplands. . 
RATE OF INCREASE OF THE BOLL WEEVIL. 
Many planters are often indifferent to the boll-weevil campaign in 
spring because so few are found in their fields. To? dicate how great 
a menace a few in spring are to the crop later on, the accompanying 
tables have been prepared. 
It should be remembered that the adult female lays from 50 to 150 
eges, and that a complete generation is developed at least once each 
montn. 
The estimate of the bolls and squares per plant per acre is based 
upon cotton planted 14 feet apart in the row and the rows 3% feet 
apart. Upon that basis there would be, to use round numbers, 8,300 
plants per acre. The squares indicated for each succeeding month are 
estimated as being in addition to those already produced. 
In making up these tables, only a pair of weevils is taken into 
account, for the reason that very early in the season the weevils are so 
few and so scattered as to make it difficult to find them on the very 
small cotton. In fact, at the beginning of the season, not more than 
two or three weevils can be estimated for every 2 or 5 acres. 
The amount of injury is estimated upon actual observations of the 

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