Inskcts and Insecticidks 
17 
annual cultivation to destroy the egg's, or when the orchard is adjoin¬ 
ing an alfalfa or grass field. They can be held in check somewhat by 
the arsenical sprays f 2-4-5). The best results in poisoning them are 
secured with poison bran-mash (3)- A band of sticky material (31) 
about the trees will keep the wingless ones from climbing. See Fig. 8. 
Fig. 8.—Rocky Mountain Rocust, laying eggs in the ground; a, a, females with their 
abdomens in the ground; b, an egg-pod broken open; c, scattered eggs; d, egg-packet in the 
ground. (After Riley.) 
The hoppers can be kept from migrating from alfalfa and grass 
fields by the free use of hopper-dozers or pans (30). See Plate 5. 
Brown Mite or Clover Mite .—This is a very small brown or red¬ 
dish mite. It feeds upon a large range of plants, including practically 
all of our fruits. It takes the name of Clover Mite from the clovers 
on v/hich it is often very numerous. The dry climate of Colorado is 
very favorable to its increase. It feeds chiefly upon the leaves. Its 
presence is most easily detected by the faded, sickly appearance of the 
foliage of the trees. See Plate 6. 
This pest winters over in both the egg and the adult stages, the 
small red eggs being placed upon the bark of the trunk and limbs and 
especially in the crotches of the smaller limbs. When very abundant 
the eggs color the bark red. Sometimes in the fall this mite becomes 
an annoyance by leaving the food plants and entering our dwellings. 
It does not bite people. 
Remedies .—The use of lime and sulphur (16-17) early in the 
spring to destroy the eggs or the mites as they hatch is probably the 
best means of control. Kerosene emulsion (10) and Soluble Oil (12) 
are also quite effective at this time. 
To kill the mites during the summer, use sulphur (20) at the rate 
of one pound to three gallons of water, with a small amount of soap 
about two pounds, to 100 gallons. Contact sprays (8-10-12-19) will 
destroy the mites, but a second application is required to kill those 
