XV* 



Remedies: Cutting off and burning small branches when first ob- 

 served to be infested. Dislodging by vigorous shaking and then destroy- 

 ing the worms. Spraying with Paris Green. 



Fig. 9. White: Marked Tussock Moth, Orgyia leitcos- 

 tigma, S. and A. This beautiful caterpillar feeds upon the 

 foliage of maple, poplar, cottonwood, etc. It is not as yet 

 abundant enough here to call for any special remedies. 



Fig. 10. Stalk Borer, Hydroecia (Papaipema) nitela, Gn. 

 This troublesome pest attacks tomato vines, potato plants, 

 aster, dahlia, golden glovv^, hollyhocks and other plants with 

 soft centers. Even wheat has suffered in Minnesota. A sud- 

 den wilting of the plant or parts of plant indicates presence of 

 caterpillar in the stem. It turns into a brownish moth. 



Remedies: This caterpillar has been killed in its burrow by inject- 

 ing about one teaspoonful of chloroform through the opening with a 

 medicine dropper and then plugging the hole with cotton. The writer 

 believes that bisulphide of carbon will do the work equally well and more 

 cheaply, but has had no opportunity to try the same. 



Fig. II. Forest Tent Caterpieear, CUsiocampa distria, 

 Hub. Very common in Minnesota. Feeds upon plum, apple, 

 maple, oak, ash, basswood, etc. See Figs. 114 and 115, p. 175. 



Remedies: Cutting off egg masses before leaves appear and destroy- 

 ing same. Crushing young worms with the hand when still small and in 

 clusters. When leaves are being badly eaten trees may be sprayed with 

 Paris Green, i lb. to 160 gals, of water. Add 2 to 4 lbs. of fresh lime to 

 this amount of liquid to guard against burning foliage. Keep mixture 

 constantly stirred. 



Fig. 12. Orange-Striped Oakworm, Anisota senatoria, 

 Hbn. Sometimes very destructive to oak trees, but also 

 attacks raspberry and blackberry. See Fig. 116 for illustration 

 of moth. 



Remedies: Paris Green sprays are useful against all leaf-eating in- 

 sects. 



Fig. 13. Lime Inch Worm, Hybernia tiliaria, Harris. 

 This "measuring worm" feeds upon the basswood or linden, 

 also on elm, hickory, etc., and sometimes on the apple. The 



