. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 18 BULLETIlsr 1040, U. S. DEPARTMENT OF AGRICULTURE. acreage was banded with burlap in the spring of 1919. Of the area infested with the mealybug in that section all but 10 acres were sprayed according to the methods outlined, with excellent results throughout. The 10-acre orchard was left as a check for control by natural enemies. The ant control was handled partly by the growers themselves, partly by the citrus associations of which the orchardists were mem- bers, and partly by contract operators. The sirup was for t
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 18 BULLETIlsr 1040, U. S. DEPARTMENT OF AGRICULTURE. acreage was banded with burlap in the spring of 1919. Of the area infested with the mealybug in that section all but 10 acres were sprayed according to the methods outlined, with excellent results throughout. The 10-acre orchard was left as a check for control by natural enemies. The ant control was handled partly by the growers themselves, partly by the citrus associations of which the orchardists were mem- bers, and partly by contract operators. The sirup was for the most part prepared by the citrus associ- ations, or purchased from druggists at a cost of $ to $2 a gallon. The spice tin was the pre- ferred container. The average cost to the grower for ant control, including refilling where nec- essary, was 4 to 6 cents per tree. The cost of burlap band- FiG. 10.—Adult of Leucopis iella. Greatly enlarged. ino" averao"ed 2 CCnts per tree. The cost of trunk spraying varied. On dense, unpruned lemon trees, headed low, spraying proved somewhat diiScult and slow. The amount of material used on such trees was also greatest. High-headed orange trees with smooth trunks were most easily and effectively sprayed. These spray operations were conducted by the growers and com- mercial outfits and an average of 10 acres a day was covered at a cost approximating the figures given for the two demonstration plots, the cost being more or less proportional to whether the trees were well pruned and open or unpruned and difficult to spray. Work carried out by the owners themselves was for the most part thoroughly done. A few orchards were trunk-treated by hand. The general results of the control campaign of 1919 at Upland were very gratifying. Orchards which had shown severe infesta- tions in the spring of 1919 were commercially clean in the spring of 1920. The reduction in grade or total loss of fruit from mealy- bugs had been reduced to a neg
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