﻿ARSENICALS. 



35 



Table 16. — Effect on toxicity of adding Bordeaux mixture and lime-sulphur to arsenimLi 

 on jour species ofinseclSj 1020. 



Arsenicals and control. 



Percentage of insects dead within— 



3 days. 



02 



w 



G days. 



3 



Commercial acid lead arsenate 



Sample 39 plus Bordeaux mixture 



(61) 



Sample 39 plus lime-sulphur (60). . 



Commercial calcium arsenate 



Sample 57 plus Bordeaux mixture 



(611 



Sample 57 plus lime-sulphur (60).. 



Laboratory sodium arsenate 



Sample 25pljs Bordeaux mixture 



(61) : 



Commercial zinc arsenite 



Sample 23 plus Bordeaux mixture 



(60 



Control with food 



91.0 



78.0 



56." 6 



52.0 



99.6' 



77.0 

 96.0 



83.0 

 .0 



7.4 

 6.5 



8.4 



3:3 



4.2 



28.8 



3.7 

 12.5 



9.1 

 .0 



18.1 



11.3 



34.0 

 14.4 



10.1 

 37.4 

 36.6 



33.8 

 68.9 



68.1 

 .6 



21.0 

 12.0 



ii'.o 



12.0 



33."6 



20.0 

 25.0 



18.0 

 .0 



35.3 



27.2 

 20.2 

 22.7 



19.3 

 20.8 

 49.3 



33.6 

 50.6 



44.5 



100.0 

 99.0 



85.0 

 83.0 



99.0 

 100.0 



95.0 

 .0 



72.8 



40.0 

 60.7 

 27.1 



11.7 

 21.0 

 72.2 



43.5 

 37.5 



30.0 

 .0 



82.2 



72.8 



72.2 

 93.5 

 91.4 



94.2 

 96.9 



58.0 



46.0 



44.' 6 



20.0 



62.'6 



53.0 

 44.0 



54.0 

 12.0 



78.3 



68.3 

 74.8 

 57.2 



46.7 

 57.2 

 81.4 





Arsenicals and control. 



Percentage of insects dead 

 within — 



Toxicity for— 



Ave 



toxi 



foi 



rage 

 city 





10 days. 





d 

 "ft 



a 



03 



a 



O 



| 



a^ 



o £ 



03 



g 

 'Si 



03 



d 



&4 



60 



03 



> 

 < 



i 



o 

 w. 



h 



O 8 



,a 



CD 



& 



CD 



"S 



o 



d 



CD 



o 



o 



a 

 o 



M 



CD 

 O 



Old! 

 m "cO 



d « 

 *£ 



S <D 



Is 



o> d 



£2 



39 



Commercial acid lead arsenate . . . 





99.3 



87.0 

 88.5 

 65.4 



47.5 

 76.0 

 96.6 



91.3 

 60.9 



70.9 

 2.6 



100.0 



100.0 

 99.6 

 100.0 



100.0 

 100.0 

 100.0 



100.0 

 100.0 



100.0 

 23.1 



99.8 



95.7 



94.0 

 87.5 



81.5 

 88.0 

 98.9 



97.1 

 87.0 



90.3 



97.0 



92.3 



79.3 



77.3 



99.7 



92.0 

 98.7 



92.7 



61.0 



44.8 

 51.9 

 33.6 



20.8 

 33.7 

 65.9 



46.2 

 37.0 



36.7 



66.8 



66.5 

 74.2 

 62.4 



60.8 

 76.9 

 76.0 



76.0 

 88.6 



88.8 



39.5 

 29.0 



66.1 

 58.2 



63.9 



91 



Sample 39 plus Bordeaux mix- 

 ture (61) 



100.0 

 97.0 

 97.0 



55.6 



93 



Sample 39 pluslime-sulphur (60). 



Commercial calcium arsenate 



Sample 57 plus Bordeaux mix- 

 ture (61) 



63.0 



57 

 92 



28.0 

 16.0 



50.8 

 43.7 



48.0 

 40.8 



94 



Sample 57 pluslime-sulphur (60). 



55.3 



?A 



47.5 



36.5 

 34.5 



36.0 



72.3 



62.7 

 64.7 



63.5 



71.0 



55 



Sample 2$ plus Bordeaux mix- 

 ture (61) 



100.0 



61.1 



93 





62.8 



54 



Sample 23 plus Bordeaux mix- 

 ture (61) 



100.0 

 .0 



62.7 



























1 Based on mortalities for third and sixth days only. 



GENERAL AVERAGE TOXICITY. 



Four arsenicals without Bordeaux mixture and lime-sulphur | 61 ; 4 (webvrorms and tent caterpillars). 



Four arsenicals with Bordeaux mixture {g;? JbS and tent caterpillars). 

 Two arsenicals without lime-sulphur, 56.0 ( webworms and tent caterpillars). 

 Two arsenicals with lime-sulphur, 59.1 (webworms and tent caterpillars). 



