Onions respond favorably to increasing levels of soil moisture as measured by increase in bulb size and total yields. Maintaining a soil moisture level of 18-20 centibars of tension (nearly field-holding capacity) produces the greatest yields of bulbs. However, dry onions so produced are somewhat softer in texture, tended toward thick -neck growth, matured slower, and are more difficult to cure adequately in the normal length of time. Onions grown on lesser amounts of water tend to have the reverse characteristics. Costs of production are similarly increased under high soil moisture levels because of the need for replacing nitrogen leached out of the root zone. Also, the costs of the water and its application must be increased. Therefore, the economics involved would be a required consideration.

The performances of four curly top resistant tomato varieties were observed in Arizona during the period 1961 to 1964. Owyhee showed resistance but produced small fruits. Breeding line No. 126 and its improved replacement VF 122, had field resistance, but VF 122 did not set fruit as well as other varieties under high temperature conditions. Payette appeared to be the most promising of the varieties tried. It showed better resistance than Owyhee and produced good yields of desirable fruit when staked and trained properly.

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Results from pepper variety tests across the state indicate that New Mexico 6-4, Rio Grande 21 and Sandia A are desirable varieties to grow in Arizona. Which variety to select will depend on use, location and individual preferences. No variety in the tests was found suitable for growing for paprika.

Eighteen sweet corn hybrids were compared in the Yuma Valley in the spring of 1961. Golden Cross Bantam, especially the 51-T strain, gave the best overall performance.

Several seasons of work indicate that topical application of granular pesticides to the whorl of fall grown sweet corn will effectively control the fall armyworm. First application to be made when the corn is approximately 12 inches high, followed by one or two additional applications at intervals of one week. The following three materials: 5 percent Diazinon granular, 5 percent Zectran granular, and 2 percent Endrin granular are the most promising when applied at 20-30 pounds per acre.

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No description available.

After commercial production on a trial basis during a four-year period (1961-65), protective cropping of tomatoes and possibly a few other higher return vegetable crops shows a promising alternative enterprise for local production whosever risks are intensified. Better adapted varieties, disease control and market development are primary objectives to be overcome.

A highly virulent bacterial isolate was obtained from Arizona vegetables. Pathogenicity and physiological studies were made in an effort to correctly identify the isolate.