This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
A whitish larva, boring in the canes of currants, and sometimes of gooseberries. The larva remains in the cane over winter.
In fall and early spring cut and burn all affected canes. These canes may be distinguished by a lack of vigor and by limberness.
Small yellowish green lice attacking the under side of the leaves, distorting the leaves and causing them to turn red.
Contact insecticides when leaves first appear.
Larva somewhat over an inch long, with stripes and dotted with yellow or black, feeding upon the leaves.
Hellebore, applied stronger than for currant-worm. Arsenicals; hand-picking.
(Pteronus ribesii) - Larva, about 3/4 inch long, yellowish green, feeding on leaves of red and white varieties; two to four broods.
Hellebore, applied early; arsenicals for the early brood. Treatment should begin while the larvae are on the lowermost leaves of the bushes. Before the leaves are fully grown, the holes made by the worms may be seen. The second brood is best destroyed by killing the first brood.
A bright yellow, black-striped bug about 1/3 inch long, puncturing the young leaves and shoots of many plants.
Jarring into a dish of kerosene. Kerosene emulsion when the nymphs are young. Cut off the tips of the shoots in early spring to destroy the eggs.
Small elongate gray or black scales with white edges. Male scales are white.
Crop close, burn over trunks, after saturating with gasolene and use blast torch.
A soft-bodied, oval, wine-red insect, one twenty-fifth inch in length, partially covered with white wax, found in large colonies at base of leaves.
Carbolic acid emulsion poured in large quantities at base of leaves.
See Bramble Fruits.