CONTROL OF GARDEN DISEASES AND INSECTS. 



59 



For all these foliage diseases use Bordeaux uiixturo, adding arse- 

 nate of lead when i^otato beetles are present. 



For late-blight August and September sprayings are most impor- 

 tant. It has been found profitable, however, to spray at frequent in- 

 tervals throughout the season, and thus protect the plants against 

 grasshoppers, flea-beetles, and other insects, tipburn, and early and 

 late blight. " " 



Fig. 07. — Potato early blight. 



WEAK PLANTS. 



Potatoes sometimes fail to grow vigorously, remaining small, with 

 wrinkled or rolled leaves and bushy or spindling shoots. Several 

 types of disease produce these effects, distinguished as leaf-roll, curly 

 dwarf, mosaic, and spindling sprout. All are due to the planting of 

 defective seed potatoes. From the gardener's standpoint no remedy 

 exists and only one preventive — the securing of better seed next 

 season. In the Central and Southern States northern-grown seed 

 gives better results than the home grown, except Avlien the latter 

 is srrown in the fall from northern seed. 



