UNCLASSIFIED PESTS 357 



Slugs often bore into ripening tomatoes but sometimes attack 

 them while still green (Fig. 226) and are often found resting 

 in cavities eaten out in ripening strawberries. 



A smaller, nearly black species, Agriolimax campestris Bin- 

 ney, is often associated with the gray field slug. It closely 

 resembles that form in habits and inflicts similar injuries. 



Conirol. 



Slugs may be killed by using the poison bait recommended 

 for the control of cutworms on page 299, or by poisoning sliced 

 potatoes with paris green or other arsenicals. Dusting the 

 plants and the surrounding ground with air-slaked lime or land 

 plaster will have a tendency to keep them away. Bordeaux 

 mixture also has a deterrent effect and on some crops may be 

 used to advantage. In some cases the plants may be sprayed 

 with arsenate of lead either alone or in combination with 

 bordeaux mixture. 



The Yellow Bear Caterpillar 



Diacrisia virginica Fabricius 



Many vegetables are occasionally subject to attack by large 

 hairy caterpillars which from their shaggy appearance and 

 clumsy gait have received the suggestive names of yellow and 

 woolly bears. The yellow bear is widely distributed from 

 Nova Scotia to California southward to Mexico and Cuba. 

 The caterpillars are very general feeders attacking asparagus, 

 bean, pea, beet, salsify, cabbage, cauliflower, radish, turnip, 

 carrot, celery, eggplant, onion, parsnip, corn, peanut, canta- 

 loupe, pumpkin, squash, potato, rhubarb, sweet potato, water- 

 melon, grasses, alfalfa, grape, currant, gooseberry, raspberry, 

 canna, dahlia, hollyhock, hyacinth, morning-glory and various 

 other plants. 



