344 



They live in the ground feeding on the roots of grasses, weeds, etc. Dig out 

 grubs from beneath infested plants. Thorough early fall cultivation of land in- 

 tended for planting will destroy many of the pupae. 



. POTATO. 



The yellow striped beetle emerges from hibernation in the spring 



Colorado and lays masses of orange eggs on the underside of the leaves. 



potato-beetle. The larvae are known as "slugs"' and "soft-shells" (Fig. 145) and 



cause most of the injury to the vines. Spray with Paris green 



2 lbs. in 100 gals, of water or arsenite of soda combined with Bordeaux mixture. 



It may sometimes be necessary to use a greater strength of the poison, particularly 



on the older "slugs." 



These small black beetles riddle the leaves with small holes and 

 Flea-beetles, cause them to die. Bordeaux mixture as applied for potato 

 blight protects the plants by making them distasteful to the 

 beetles. See under potato blight. 



CUCUMBER, MELON AND SQUASH. 



These yellow, black-striped beetles appear in numbers and 



Striped cucum- attack the plants as soon as they are up. Plant early squashes 



ber-beetle. as a trap-crop around the field. Protect the vines with screens 



until they begin to run, or keep them covered with Bordeaux 

 mixture, thus making them distasteful to the beetles. 



Squash vines are frequently 



Squash-vine killed by a white caterpillar. 



borer. which burrows in the stem 



near the base of the plant. 

 Plant a few early squashes between the rows of 

 the late varieties as a trapcrop. As soon as 

 the early crop is harvested, remove and burn 

 the vines. When the vines are long enough, 

 cover them at the joints with earth in order to 

 develop secondary root systems for the plant in 

 case the main stem is injured. 



These dark green plant-lice 

 "~^ Aphis. feed on the undersides of the 



leaves causing them to curl 

 and wither. Spray with kerosene emulsion 

 diluted with 6 parts of water. It is necessary 

 thoroughly to cover the underside of the leaves ; 

 the sprayer, therefore, must be fitted with an 

 upturned npzzle. Burn the vines as soon as the 

 crop is harvested and keep down all weeds. 



The rusty-black adult emerges from hibernation in the spring 



Squash and lays its eggs on the underside of the leaves. The nymphs 



stink-bug. suck the sap from the leaves and stalks causing serious injury. 



Trap the adults under boards in the spring. Examine the leaves 

 for the smooth shining brownish eggs and destroy them. The young nymphs may 

 ba killed with kerosene emulsion. 



Imported cabbage- 

 worms. 



