Table 13. The number of trees that can be ground-sprayed with 100 gallons or 1 gallon of spray mixture 

 when applied at the rate of 100 gallons per acre and spraying around the tree trunk 

 the stated number of feet. 



Distance sprayed 



from middle of 



the truni< 



No. trees/I 00 gals. 



Calculated Calculated 



as a square as a circle 



Approx. no. trees/gal. 



Calculated Calculated 



as a square as a circle 



3 feet 



4 feet 



5 feet 



6 feet 



7 feet 



1210 

 681 

 436 

 303 

 222 



1539 

 868 

 555 

 385 

 283 



12 

 7 

 4 

 3 

 2 



15 

 9 

 6 

 4 

 3 



Table 14. Ounces of dichlobenil required per tree when applying this herbicide by hand. 



Area treated 

 around the base 



Square area 



6 ft. X 6 ft. 



8 ft. X 8 ft. 

 10 ft. X 10 ft. 

 12 ft. X 12 ft. 

 14 ft. X 14 ft. 



Circular area 



6 ft. diameter 



8 ft. diameter 



10 ft. diameter 



12 ft. diameter 



14 ft. diameter 



Ounces of dichlobenil G-4 



At rate of 100 lb/A 



1.3 

 2.4 

 3.7 

 5.3 

 7.2 



1.0 



1.8 

 2.9 

 4.2 

 5.7 



At rate of 150 lb/A 



2.0 

 3.5 

 5.5 

 7.9 

 10.8 



1.6 

 2.8 

 4.3 

 6.2 

 8.5 



the applicator. 



Calibration of a handgun on a hydraulic sprayer or a com- 

 pressed air knapsack sprayer. When applying the herbicide 

 with a handgun and to a limited area around each tree, 

 calibration is relatively simple. First, determine how long it 

 takes to deliver one gallon of spray. Then choose from 

 Table 13 the plot size to be sprayed and note the number 

 of plots that a gallon will cover. Finally, determine the 

 length of time to spray one plot. 



Example; (a) The hand gun delivered 1 gal. in 63 

 seconds. 



(b) The distance sprayed from the middle of 

 the trunk will be 4 feet. When calculated 

 as a circle, 1 gal. will spray 9 areas of this 

 size. 



(c) Seconds to deliver 1 gat. /Trees per gal. = 

 63/9 = 7 seconds/tree. 



(d) The data show that each plot should be 



sprayed in 7 seconds. 



Applying dichlobenil by hand. Some growers apply dichlo- 

 benil by hand on an individual tree basis. Table 14 above 

 indicates the ounces of dichlobenil to apply per tree based 

 on area to be treated. For example, if you plan to apply 

 dichlobenil at the rate of 100 pounds per acre and to treat a 

 circular area of 6-foot diameter under each tree, one ounce 

 of dichlobenil should be applied under each tree. 



Mouse Control 



Three general methods of bait application for mouse control 

 are available: hand trail baiting; mechanical trail baiting; 

 and broadcast baiting. Hand trail baiting, placement of zinc 

 phosphide-treated grain baits in natural mouse trails and 

 burrows, gives excellent control of both meadow and pine 

 mice but is slow and tedious especially when mice ^re not 

 abundant or surface signs of pine mice are obscure. 



Treat 2 to 4 spots with teaspoonful quantities of bait 



31 



