208 



PESTS OF GARDEN AND FIELD CROPS 



lime. Around cotton fields weeds should be kept down, and in the 

 fall all dead, infested cotton plants should be burned. 



The Clover Mite {Bryobia pratensis Garm.) 



Both the leaves of clover and the foliage of various fruit trees are 

 attacked by a small, eight-legged mite, which sucks their juices, 

 causing much injury when abundant. 

 It is a tiny red creature three hun- 

 dredths of an inch in 

 length. 



On clover no direct 

 remedial measures seem 

 feasible. The mite 

 passes the winter as a 

 rule in an egg stage 

 on the bark of neigh- 

 boring fruit trees. It 

 may be killed there by 

 spraying in winter witlv 

 lime-sulphur solution. 



Fig. 257.— The 

 Clover Mite. 

 Enlarged to 

 fifteen times 

 natural size. 

 Original. 



Fig. 258. — Eggs of the Clover 

 Mite on bark. Enlarged to 

 ten times natural size. Orig- 

 inal. . 



The Cotton Boll Weevil {Anthonomus grandis Boh.) 



No pest of recent years has wrought greater damage than this in- 

 vader from Mexico. It is now distributed throughout the greater 

 part of the cotton-growing regions. 



Both the squares and the bolls are attacked, their substance eaten 

 out, and their contents so damaged that they die or fail to produce 

 fiber. The injury is wrought both by the adults iu their feeding and 

 egg-laying punctures, and by the grubs which hatch from the eggs 

 laid within the bolls or squares. 



The adult boll weevil is a small snout beetle, one fourth of an inch 

 long. It is brownish in color through most of its existence, but lighter 

 when newly emerged and darker after it has been out for two or three 

 weeks. The grub, found only within the squares or bolls, is whitish, 

 heavy bodied, and has a dark head: It has no feet. 



