Types of Garden Enemies
Fig. 4
GREEN PEACH APHID (Myzus persicae), also known as spinach aphid. This is an important species, quite injurious to peaches, potatoes, and spinach, feeding on many other fruits, vegetables, and ornamentals, and a vector of tomato mosaic and many other virus diseases. Shiny black eggs winter on bark of fruit trees, hatching when peaches come into bloom. The young nymphs are yellow green with 3 dark lines. After sucking sap from twigs for 2 or 3 generations winged forms migrate to garden plants.

Control. Spray widi nicotine sulfate and soap or TEPP. IVY APHID {Aphis hederae). A dark-green, brown, or black species, quite small, common on growing tips of English ivy. A weekly bath for house ivies will keep aphids at a minimum, but if they get a headstart you can kill them by aiming a pressure "bomb" (DX Aero-Spray) at the tips, or you can bathe the ivy in a pail of soapy water.

Fig 5

MELON APHID {Aphis gossypii). A very cosmopolitan species and perhaps our most destructive. This small species, dark green, varying to yellow green, brown, or black, is common everywhere on cucumbers, melons, and squashes, curling the young leaves and infecting them with cucumber and melon mosaic. In the South it is serious on cotton and citrus as well as vegetables and there works through the whole year without an egg stage.

Control. Nicotine or rotenone sprays or dusts are fairly effective if started before leaves curl. Make sure dust mixtures do not contain sulfur as a diluent for this is injurious to cucurbits.

NORWAY-MAPLE APHID {Periphyllus lyropictus). This is the chief cause of the sticky mess on cars parked along the street, for the large green or brown aphids drop vast quantities of honeydew, sometimes the leaves drop too, sticking to your shoes as you walk along the pavement. Where towns can afford it street trees should be sprayed early in summer.

PINE BARK APHID (Pineus strobi). The white fluffy masses you see up and down the trunk and on the underside of branches of white pine, sometimes Scotch and Austrian pines, are covering small aphids. Lindane, at the rate of 1 pound 25% wettable powder to 100 gallons of water, 1 tablespoon to 1 gallon, is now suggested. Older remedies are a dormant oil spray or nicotine sulfate and soap applied with enough pressure to break through the white felt.

POTATO APHID (Macrosiphum solanifolii), an important rose pest as well as a potato problem. Black eggs winter on rose canes, and pink and green lice appear on new shoots and buds in spring. Winged forms migrate to potatoes in summer, curling foliage and sometimes killing vines, and to tomatoes, sometimes preventing blossom set. They carry the virus of mosaic and other diseases.




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