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.
Tobacco sprays. Spray with paris green one pound in one hundred gallons water sweetened with twenty pounds brown sugar when thrips first appear.
Small, white larvae infesting the buds causing them to become unduly enlarged.
Cut off and destroy infested buds.
Wash plants with nicotine solutions and soapsuds.
Shining black plant-louse that clusters on leaves and stems.
Larva, 1 1/2 inches long, light yellow or greenish yellow with lines and spots; feeds upon leaves of parsley, celery, carrot, and related plants. When the worm is disturbed it ejects from the anterior end two yellow horns, with an offensive odor.
Hand-picking. Poultry are said to eat them sometimes. Upon parsnips, arsenicals.
Larva, about 1/2 inch long, feeding in the flower-cluster and causing it to become contorted.
Arsenicals, applied as soon as the young worms appear, and before the cluster becomes distorted. Burn the distorted umbels. Destroy all wild carrots.
Small, whitish maggots mining the leaves.
Hand-pick infested leaves.
A small brown-black beetle, living in peas over winter. The beetle escapes in fall and spring, and lays its eggs in young pea-pods, and the grubs live in the growing peas.
Catalogue of Insects, continued.
Hold over infested seed one year before planting. Late planting in some localities. Fumigation with carbon bisulfid.
A rather large green plant-louse, often attacking peas in great numbers and causing enormous losses.
Rotation of crops, early planting. When peas are grown in rows, the brush-and-cultivator method may be used. The plant-lice are brushed from the plants with pine boughs, and a cultivator follows stirring the soil. This operation should be performed while the sun is hot and the ground dry. Most of the lice will be killed before they can crawl back to the plants. Repeat every three to seven days.
A small black or brown plant-louse, which attacks the tops and roots of peach trees. When upon the roots it is a very serious enemy, stunting the tree and perhaps killing it. Thrives in sandy lands.