Effect of soil applications of Effect of soil applications of insecticides on the growth and yield of vegetable crops effectofsoilappl926ston Year: 1953 14 CIRCULAR 926, U. S. DEPARTMENT OF AGRICULTURE Table 4.—Tolerance of two varieties of peas to insecticides ap- plied to the soil prior to planting, as indicated by yields on 360 feet of roiv1 Insecticide (pounds per acre) Untreated check Aldrin 4 Chlordane 20 Toxaphene 20 Ethylene dibromide 54 Laxton Progress (1949) Green pods Pounds Vines 54 60 50 49 56 Pounds 28 32 28 28 30 Wyola (1951) Green pods Pounds 51 54 61 1 !43 _ 146 Vines Pounds
Effect of soil applications of Effect of soil applications of insecticides on the growth and yield of vegetable crops effectofsoilappl926ston Year: 1953 14 CIRCULAR 926, U. S. DEPARTMENT OF AGRICULTURE Table 4.—Tolerance of two varieties of peas to insecticides ap- plied to the soil prior to planting, as indicated by yields on 360 feet of roiv1 Insecticide (pounds per acre) Untreated check Aldrin 4 Chlordane 20 Toxaphene 20 Ethylene dibromide 54 Laxton Progress (1949) Green pods Pounds Vines 54 60 50 49 56 Pounds 28 32 28 28 30 Wyola (1951) Green pods Pounds 51 54 61 1 !43 _ 146 Vines Pounds 35 38 43 30 36 1 Not significant according to the F test. Potatoes Seed potatoes of the Bliss Triumph variety were planted 20 inches apart in rows on April 19, 1949, February 17, 1950, and March 8, 1951, and were harvested on August 2, June 22, and July 9 in the respective years. At harvesttime the potatoes were plowed up and handpicked, and all were weighed regardless of size (fig. 5). In 1949 there was an exceptionally good stand of potatoes in all plots despite the delayed planting. None of the treatments affected the rate of emergence of the plants, and there was no significant Figure 5.—Harvesting potatoes in experimental plots.
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