18 The Colorado Experiment Station. 
Insects Injurious to Small Fruits. 
While there are a number of insects that infest the small fruits, 
hardly any of them are sufficiently injurious to cause any serious 
concern to the growers. The currant worm is sometimes present 
and does considerable damage. This insect can be kept in control 
by the use of White Hellebore when applied at the rate of one 
ounce to three gallons of water. In buying Hellebore from the 
drug store insist that it be fresh, for it loses its strength with age 
and has little effect as an insecticide. 
Fungous Diseases. 
There are a number of diseases common to small fruits oc¬ 
curring in Colorado and some years cause considerable damage. 
While as yet we have had no serious and extensive outbreaks, their 
presence calls for preventive measures. 
Anthracnose is more or less common to the red and black 
raspberries and is readily distinguished by greyish colored spots 
on the canes. When these discolorations or spots become numer¬ 
ous the canes are apt to die. 
This disease is easily controlled by systematic cutting out of 
the affected canes and burning them. All the old canes should also 
be cut out as soon as the fruiting season is over, and burned. The 
young canes should be sprayed with Bordeaux Mixture, full 
strength, starting early in the spring before the leaves come out 
and before the disease appears. It is a preventative and not a cure 
and should be applied as a safeguard against the appearance of the 
disease. Eater applications should be given after the young canes 
have started to grow, using Bordeaux Mixture half strength. 
(Avoid diseased plants in setting out a plantation.) 
Root Gall .—A disease quite common on the raspberries in 
many sections of the state. Nothing can be done in the way of 
treatment. As the name indicates, the disease appears on the roots, 
forming tumors or galls which greatly interfere with the distribu¬ 
tion of food materials and when these galls are present in large 
quantities the canes become sickly, stunted, and shriveled. In set¬ 
ting out a new plantation, great care should be taken to eliminate 
all plants that show indications of root gall. Even doubtful plants 
should be thrown out. 
Orange Rust .—This disease infests the gooseberries and cur¬ 
rants. It is readily recognized by the orange colored spots usually 
on the under side of the leaves. When this disease has gained a 
foothold nothing can be done to eradicate it, as the fungus lives 
within the tissue of the leaf. 
