Tnskcts and Insecticides 
27 
U])ori the flesh, causin^^ the fruit to fall. The curculio infests plum, 
peach, cherry, apple, pear, wild plum, and hawthorn. It is to the 
cherry and plum what the codling-moth is to the apple. 
This pest has never been reported in Colorado. Anyone finding 
what he thinks is its work should notify the Experiment Station. 
Remedies. —Same as for preceding species. Spraying with arse¬ 
nate of lead gives better results than with the plum gouger. Prob¬ 
ably the best remedy consists in keeping the orchard free of rubbish 
and giving a fall cultivation to destroy the over-wintering beetles. 
The beetle thrives in over-grown, unpruned and neglected orchards. 
They are sby of the sun. Prune the trees and let the sun in. 
Green Peach Aphis (See Foliage).—This plant louse attacks the 
fruit of the peach and plum just after the flowers fall, causing many 
of the little fruits to drop. 
Tarnish Plant Bug .—For some time there has been considerable 
complaint from peach growers of the State of waxy peaches. The wax 
or gum forms in small beads or long strings on the fruit. When 
brushed ofif, very little, if any blemish is Pft. This is often caused by 
the food punctures of the tarnish plant bug, a small, brownish, and 
very active plant bug about one-fifth of an inch in length. Early food 
punctures may cause deformed fruit. 
The adults winter over among weeds and rubbish about the 
orchard, and bre^^d principally on the weeds and under-growth. Occa¬ 
sionally they deposit their long white eggs in the fruit. 
The nymphs or young are wingless, attaining their wings at 
about one month of age. 
Remedies. —This is a very difficult insect to control, owing to its 
wide rang'e of food-plants, and the fact that much of the injury is done 
by the winged adults which are ver^^ shy and active. Numbers 10 and 
19 will be found to be of some value. CPan cultivation and the de¬ 
struction of all hibernating places will also h'^lp much. 
Scale Insects. —Some of the scale insects, esnecially the San Jose 
and Howard scales, will attack the fruit. The Howard 'sicale is quite 
bad on plums in some sections, spotting the fruit and making it un¬ 
salable. (See under Apple and Pear.) 
Foliage 
Green Peach Aphis. —A pale green or greenish yellow louse that 
hatches from the over-winter eggs early in the spring. It attack3s’ the 
blossoms and small fruits, causing many to drop, and later attacks the 
leaves which curl and turn yellov/. About mid-summer this louse 
