June, '15] LEONARD: CONTROL OF TARNISHED PLANT-BUG 363 



Cost of Construction 



2,000 linear feet wire screen cloth, 72 inches wide, 12 meshes to the inch, at 



$1 .70 per hundi-ed square feet $204 . 00 



Tanglefoot, 175 pounds 30 . 00 



Poles used for uprights, 200 at 5c per pole 10.00 



Materials and labor 



Construction of fence, 145 hrs. at 20p per hr 29.00 



Applying tanglefoot, 40 hrs. at 20c per hi- 8.00 



Mounding dirt at bottom, 5 hrs. at 20e per hr 1 . 00 



Total $282 . 00 



The peach blocks were first examined on June 4 and at that date a 

 tarnished plant-bug nymph in the third instar was found. On June 

 6, two adults were captured. On June 9, two adults were taken inside 

 the enclosure and four outside; the following day two inside and 

 none outside, and on June 10, two inside and one outside. 



In order to determine whether tarnished plant-bugs were getting 

 over the fence into the enclosure, careful counts were made at short 

 intervals. There were 66 rows inside the enclosure, each about 450 

 feet in length. An equal distance was measured off on these same rows 

 immediately south of the enclosure as a check plot. Every eighth 

 row was selected and the number of tarnished plant-bugs occurring on 

 each row recorded. The insects were caught by walking along the 

 rows and sweeping the trees with an insect net. The following table 

 is a record of these counts made from June 15 to July 24. 



[Table Sho-s^ ing the Number of Taexished Pl.axt-Bcgs CArcHT per Row in the Peach Blocks 



Enclosure 



June 



15 



17 



18 



22 



23 



25 



26 



30 



Jy.4 



7 



9 



14 





18 



24 



Row 1 . . . 



2 



1 



1 



4 



4 



7 



20 



4 



15 



4 



9 



20 



32 



6 



19 



9. . . 



0 



0 



1 



3 



0 



4 



6 



4 



11 



12 



23 



25 



22 



3 



22 



17. . . 



0 



0 



0 



0 



0 



6 



12 



11 



14 



36 



54 



61 



44 



10 



12 



2.5. . . 



0 



0 



0 



0 



3 



5 



12 



13 



21 



76 



112 



60 



50 



25 



13 



33. . . 



0 



0 



0 



4 



2 



1 





12 



20 



18 



26 



46 



50 



14 



12 



41. . . 



0 



0 



0 



0 



6 



3 



6 



4 



17 



13 



26 



29 



60 



17 



25 



49. . . 



0 



0 



0 



2 



3 



11 



10 



17 



12 



30 



39 



72 



50 



28 



15 



57. . . 



1 



0 



0 



2 



2 



6 



11 



23 



31 



78 



78 



81 



59 



22 



11 



65. . . 



2 



0 



1 



0 



7 



11 



13 



30 



21 



47 



27 



62 



47 



25 



20 



Total 



5 



1 



3 



15 



27 



54 



107 



118 



162 



314 



394 



456 



414 



150 



149 



