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.
Small bluish green plant-lice infesting the roots, causing the plants to turn yellow and sickly.
Mix tobacco dust into the soil around the plants when transplanting.
A yellowish green caterpillar striped with pinkish brown, about 1 inch long when mature, rolls the leaves and eats small holes in the fruit, rendering it unfit for sale.
Arsenate of lead when the caterpillars appear.
A small unarmored scale with white mealy covering.
Kerosene emulsion, one part to ten parts water.
Small purplish red scales 1/8 to 1/4 inch in length, covered with a dense cottony coating; often 1/2 inch in diameter. They collect in large numbers in the crotches and leaf-axils.
Repeated applications of kerosene emulsion.
Small yellowish lice which collect in large numbers on the under surface of the leaves.
A small grub boring in the stems.
Soft scales closely resembling the common mealy-bug (Pseudococcus).
A light yellowish brown lady-bird beetle, with four black spots on each wing-cover, attacks and devours all parts of the bean plant. The larva, which is yellow and covered with stout branched spines, also feeds on the bean.
Arsenate of lead or kerosene emulsion.
Catalogue of Insects, continued.
A pale yellow beetle 1/5inch in length, with black markings on the wing-covers, often eats round holes in the leaves. The larvae feed on the roots and main stems of the plants.
Arsenate of lead as soon as the beetles appear.
Closely resembles the pea-weevil, which see for description and remedies. Holding over the seed will be of no value with this insect.
A maggot attacking germinating seeds and roots of young plants.
Avoid stable manure; practise crop-rotation. In the garden, use sand moistened with kerosene around the plants to keep the flies from laying the eggs.
A root-infesting plant-louse locally abundant in certain western states.