106 Bulletin 78 



Tomato Insects and Diseases. — The most serious disease which 

 affects the tomato in this country is a wilt which may attack the 

 plant in almost any stage. The sapwood of the plant is clogged 

 near the ground, this being indicated by a tan colored area in the 

 sapwood. The plant shows slight indications of disease until it 

 wilts and dies. Little is known of this disease. Transplanted plants 

 seem to be affected more than plants grown in place. The late- 

 planted plants seem to be attacked less than early planted ones. 

 Rotation may do some good, but there is no remedy known. Blight 

 may attack the vines. This can be controlled by spraying the vines 

 with Bordeaux mixture, made at the rate of 4 pounds of bluestone, 

 4 pounds of lime, and 50 gallons of water. This is a preventive, and 

 not a cure for diseased vines. 



Blossom end rot seems to be caused by an irregular water supply, 

 but this is not proven. 



Few insects trouble tomatoes. Cut worms may kill a good 

 many young plants, but poison bran mash will control these. The 

 "tomato worm," which attacks corn and cotton is widely distrib- 

 uted and may do damage. There is no satisfactory remedy. 



TURNIPS 



Turnips of all varieties are easily grown in almost any part of 

 Arizona. In the mountains they are grown in the summer and 

 in the hot southern valleys in the fall, winter and spring. The seed 

 will germinate in the southern valleys at any time from August 

 to the succeeding May, in most cases germinating quickly during 

 the warmest weather of this period and slowly during the coolest. 

 During both the warmest and the coldest weather also, the young 

 plants are apt to be injured, though injury by cold is less frequent 

 and less severe than injury by heat. Well established plants are 

 not severely injured by cold. 



All varieties do very well, including the rutabagas, which require 

 a lower temperature for germination than turnips. 



VELVET BEANS 



Velvet beans, which are reported to grow so luxuriantly and to be 

 so valuable as a forage and. green-manuring crop in some portions 

 of the South, have not thus far proved valuable for this region, the 

 aridity of the atmosphere probably being too great tor their suc- 

 cessful culture. 



