Treatment

Tobacco sprays. Spray with paris green one pound in one hundred gallons water sweetened with twenty pounds brown sugar when thrips first appear.

Orange

See Citrus.

Orchids. Hemispherical Scale

See Citrus.

Orchids Isosoma (Isosoma Orchidearum)

Small, white larvae infesting the buds causing them to become unduly enlarged.

Treatment

Cut off and destroy infested buds.

Scale Insects

Several species.

Treatment

Wash plants with nicotine solutions and soapsuds.

Papaver. Plant-Louse (Aphis Rumicis)

Shining black plant-louse that clusters on leaves and stems.

Treatment

Contact insecticides.

Parsnip. Parsley-Worm (Papilio Asterias)

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.

Remedies

Hand-picking. Poultry are said to eat them sometimes. Upon parsnips, arsenicals.

Parsnip-Louse (Hyadaphis Pastinacae)

Greenish plant-lice.

Treatment

Contact insecticides.

Parsnip Web-Worm (Depressaria Heracliana)

Larva, about 1/2 inch long, feeding in the flower-cluster and causing it to become contorted.

Treatment

Arsenicals, applied as soon as the young worms appear, and before the cluster becomes distorted. Burn the distorted umbels. Destroy all wild carrots.

Parsnip Leaf-Miner (Acidia Fratria)

Small, whitish maggots mining the leaves.

Treatment

Hand-pick infested leaves.

Passiflora. Mealy-Bugs

See Citrus.

Pea. Cut-Worms

See Corn.

Pea-Weevil, Or Pea-Bug (Bruchus Pisi)

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.

Treatment

Hold over infested seed one year before planting. Late planting in some localities. Fumigation with carbon bisulfid.

Pea Aphis (Macrosiphum Pisi)

A rather large green plant-louse, often attacking peas in great numbers and causing enormous losses.

Treatment

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.

Peach. Black Aphis (Aphis Persica-Niger)

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.