Table 2 . --Effects of soil fumigation on weed density, Coeur d'Alene and Savenao 



nursery soil fumigation trials , 1961-1963 



Fumigant : Weeds per 

 (amount applied/acre) square foot 



1961 (Fall)2 Brozone (170 lb.) 1 



Coeur d'Alene Brozone (340 lb.) 2 



(counted 6/25/62) Trizone (140 lb.) 10 



Trizone (180 lb.) 11 



Unfumigated 20 



1963 (Spring) Vapam (40 gal.) 3 



Coeur d'Alene Brozone (340 lb.) 4 



(average of four MC-33 (300 lb.) 5 



counts during 1963 Vapam (80 gal.) 5 



growing season) Brozone (170 lb.) 7 



Trizone (200 lb.) 7 



M-2467 (50 gal.) 8 



MC-33 (170 lb.) 10 



Trizone (140 lb.) 11 



Vidden-D (50 gal.) 13 



M-2441 (50 gal.) 14 



Brozone (110 lb.) 17 



Unfumigated 22 



1963 (Fall) Trizone (200 lb.) 8 



Coeur d'Alene Brozone (170 lb.) 8 



(counted 6/24/64) MC-33 (170 lb.) 8 



Brozone (340 lb.) 14 



Vapam (80 gal .) 14 



M-2467 (50 gal.) 15 



Vidden-D (50 gal . ) 16 



Trizone (140 lb.) 17 



M-2441 (50 gal.) 18 



MC-33 (300 lb.) 21 



Brozone (110 lb.) 22 



Vapam (40 gal . ) 34 



Unfumigated 37 



1963 (Fall) Brozone (170 lb.) 5 



Savenac Brozone (340 lb.) 8 



(counted 6/17/64) Trizone (200 lb.) 11 



Vapam (80 gal.) 11 



MC-33 (170 lb.) 12 



MC-33 (300 lb.) 14 



M-2467 (50 gal.) 26 



Trizone (140 lb.) 27 



M-2441 (50 gal.) 30 



Vidden-D (50 gal.) 44 



Brozone (110 lb.) 45 



Vapam (40 gal.) 66 



Unfumigated 80 



Vertical lines indicate those population estimates that are not significantly 

 different at the 95% probability level. 

 ^No statistical test made. 



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