. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. 1726 ENCYCLOPEDIA OF PRACTICAL HORTICULTURE Mealy Bugs Tuber Mealy Bug Pseudococcus affinis Mask. The tuber mealy bug occurs in Aus- tralia, and is found upon the tubers of dahlias and potatoes. Solanum Mealy Bug Pseudococcus solani Ckll. Color The body is pale yellowish and sparsely covered with fine white powdery wax. Food Plants This species a
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. 1726 ENCYCLOPEDIA OF PRACTICAL HORTICULTURE Mealy Bugs Tuber Mealy Bug Pseudococcus affinis Mask. The tuber mealy bug occurs in Aus- tralia, and is found upon the tubers of dahlias and potatoes. Solanum Mealy Bug Pseudococcus solani Ckll. Color The body is pale yellowish and sparsely covered with fine white powdery wax. Food Plants This species appears to be a subterran- nean form and lives either entirely un- der ground or upon the branches which touch the ground. It has been found feeding upon the following plants: Aster, sp. nightshade, pigweed, potato, purslane, wild sunflower, tomato. E. O. EssiG Potato Eel Worm or Common Nematode Heterodera radicicola Greef. General Appearance The presence of this pest is told by such characteristic injuries as root knot on nursery trees, galls on tomato vines and the rough warty surface of potato tubers. The animal causing the injuries is commonly known as the nematode worm and was recently given much prom- inence as the potato eel worm. The males and young, the usual forms of the animal, are microscopic, transparent and shaped much like minute eels. The female is pear-shaped and pearly-white. The eggs are oval in shape and laid in great num- bers. Life History The young eel worms feed upon the roots of various plants causing galls or knots which may greatly impair growth. The female develops within the affected areas and begins egg-laying, the young hatching in a very short time afterwards. The winter is passed in the original host if it remain growing in the soil, such as nursery stock, but if the host is removed they feed upon various plants left in the fields. The young have the ability to en- cyst themselves so as to resist great ex- tremes of weather and unfavorable condi-
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Keywords: ., bookcentury1900, booksubjectfruitculture, booksubjectgardening
