WATER REQUIRED TO PRODUCE CERTAIN CROPS 



2027 



few isolated plants for a year before tak- 

 ing a chance of infecting new fields. 



Wlien the disease appears in a patch 

 the plants affected should he removed and 

 burned as soon as they are discovered. 



In districts where this wilt is already 

 widespread and the further culture of 

 melons is desirable, the only course open 

 to the grower is to secure a resistant 

 strain by breeding and selecting. It has 

 been found that these resistant strains 

 can rarely be transferred to new locali- 

 ties and still retain their resistance. The 

 problem, therefore, becomes an individual 

 one for each section of the country. The 

 task will take several years and it will 

 be necessary to devote several acres of 

 good melon soil to the work in order to 

 secure the desired results. 



The experimental work consists in 

 crossing the watermelon with the citron, 

 which is more hardy and resistant to 

 the wilt. By following the breeding with 

 careful selection, a resistant melon hav- 

 ing good flavor and shipping qualities 

 can be developed. 



WATEKMIIOlSr PESTS 



Banded Leaf-Footed Plant Bug, see 

 Cucumber Pests. 

 Common Squash Bug, see Squash Pests. 

 Melon Aphids, see ApMds. 



Melon Fly 



Dacus cucurMtae 

 This important pest is a near kinsman 

 of the much-feared Mediterranean fruit 

 fly, against which a rigid quarantine is 

 maintained in this country. 



Biff. 1. Melon Ply. 



The fly seems to have become dis- 

 tributed pretty well over the islands of 

 the Pacific, and is frequently intercepted 

 in fruit from Honolulu. 



Growers should be on the watch for it. 



Melon Worm, see Gucumber Pests. 



Northern Leae-Footed Plant Bug, see 

 Gucumher Pests. 



Plant Louse, see ApMds. 



Pickle Worm, see Gucumber Pests. 



Potato Flea Beetle, see Potato Pests. 



Squash Ladx Beetle, see Squash Pests. 



SmwED Cucumber Beetle, see Gucum- 

 ber Pests. 



Twelve-Spotted Beetle, see Gucumber 

 Pests. 



Water Required to Produce 

 Certain Crops 



A table showing the pounds of water 

 required to produce a pound of dry 

 matter has been worked out by Profes- 

 sor C. C. Thom, Soil Physicist at the 

 Washington Experiment Station. 



Kind of Crop Pounds of Water 



Potatoes - 167 



Sorghum 230 



Onions 235 



Corn 290 



Barley - 294 



Carrots 297 



Sugar Beets 304 



Timothy 315 



Oats 345 



Tomatoes — 350 



Cabbage 398 



Soy Beans 408 



Alfalfa 414 



Emmer - 415 



Canada Peas 444 



Field Beans - 444 



Red Clover 448 



Wheat 450 



Water Rights, see Irrigation, 



Water Supply foe a Farm Home, see 



under Farms. 

 Water, How to Estimate QtrANTiTY of, 



see Irrigation. 



