INSECT PESTS 



307 



STRAWBERRY 



Strawberry Sawfly: Larvae devour the 

 leaves. Spray with lead arsenate or helle- 

 bore. 



Strawberry Flea-Beetle: Eats round 

 holes through the leaves. Spray with lead 

 arsenate. 



Strawberry Leaf -Roller: Larvae roll 

 leaf and feed inside. Spray with lead 

 arsenate. In bad infestations burn over 

 fields as soon as crop is harvested. 



Strawberry Weevil: The females of 

 this small snout beetle cut off the blossom 

 buds of staminate varieties when ovi- 

 positing. Plant pistillate varieties in part. 

 Spray with lead arsenate. 



Strawberry Crown Borer: Grub feeds 

 in the crown of the plant. Practice crop 

 rotation. Burn over infested field in Fall. 



Strawberry White-fly: Sucks sap from 

 the under side of the leaves. Underspray 

 with soap and nicotine solution. 



Strawberry Root Aphid: Sucks sap 

 from leaves and roots, killing plants. 

 Spray with nicotine solution. Set clean 

 plants on land not infested. 



SWEET POTATO 



Tortoise Shell 

 Beetles: Feed 

 upon leaves. 

 Spray with lead 

 arsenate. 



TOBACCO 

 Flea Beetle : 



Eats holes 

 through the 

 leaves. Spray 

 upper and under 

 leaf -surfaces 

 heavily with lead 

 arsenate. 



Cut Worms: 

 See Tomato. 



Tobacco or 

 Tomato Horn • 

 Worms: Large 

 green caterpillars 

 with horn on the 

 tail devour the 

 leaves. Practice 

 hand picking. 

 Spray with lead 

 arsenate. 



Horn Worm 



Affects both Tomato 



and Tobacco 



TOMATO 



Cutworms: Eat 



off the stems of the 

 plants near the 

 ground; certain 

 species climb the 

 plants and eat the 

 leaves. Scatter poi • 

 soned bran mash 

 around the field just 

 at night so that the 

 'vc^cut worms may have 

 The Cut Worm a chance to get it 

 A general pest before it dries. 



Flea Beetle: See Potato or Tobacco. 

 Stalk Borer: See Dahlia. 



Tomato or Tobacco Horn-worms: 



See Tobacco. 



Greenhouse White-Fly: Immature 

 insects suck the sap from the under sides 

 of the leaves. Underspray with soap and 

 water. Fumigate greenhouses and frames 

 with hydrocyanic acid gas. 



TULIP TREE 



Tulip Tree Scale 



Tulip Tree Scale: Large, brown, 

 hemispherical scales on bark of lower 

 branches, sucking the sap. Spray with 

 lime-sulphur in Fall or Winter. 



TURNIP 

 Cut Worms: See Tomato. 

 Cabbage Root Maggot: See Cabbage. 



Turnip Aphid : Green aphids on under 

 side of leaves sucking the sap. Under- 

 spray with soap and water or nicotine 

 solution. 



VIOLET 

 Violet Sawfly: Larvae devour leaves. 

 Spray with lead arsenate or hellebore. 



E^l- worms: Infest the roots, forming 

 galls. Plant in new soil or sterilize old soil 

 by steam. Add plenty of air-slaked lime 

 to the soil. 



WALNUT 

 Walnut Caterpillar : Clusters of black 

 caterpillars covered with whitish hairs 

 strip the branches and finally the tree in 

 August. Spray with lead arsenate. Clip 

 off twigs when caterpillars are small, and 

 kill by crushing. 



Walnut Weevil or Curculio: ^Adults 

 feed at base of leaf stems; larvae tunnel in 

 new shoots and infest the fruit of Persian 

 and Japanese Walnuts. Spray with lead- 

 arsenate. 



