-86- 
Lygidolon laevigaturo Reut. 
In laboratory tests in South Africa pyrethrum dust -was superior 
to derris against this insect -which attacks wattle, — Evens ( 170 ) . 
Lygus atriflavus Knight 
In laboratory test a dust containing 0.125 percent of pyrethrins 
and 0.5 percent of rotenone gave good kills of the nymphs and adults. 
Kills approaching 90 peroent were obtained in the field with this 
dust but the fields were soon heavily reinfested.— Fisher and Shull 
(187). 
Lygus campestris (L.) 
Spraying with powdered derris and a wetting agent is helpful 
and will give satisfactory control if the applications are started 
while the infestation is light.— Whitoorob (679 , p. 39). 
Lygus elisus Van D. 
Lygus hesperus Knight 
The information given for L. atriflavus also pertains to these 
two species .--Fisher and Shull Tl87 ) * 
This species can be reduced by the use of a derris dust or a 
pyrethrum extract.— U. S. Bureau of Entomology and Plant Quarantine 
(622 , p. 70). 
Lygus oblineatu8 (Say), the tarnished plant bug 
A spray mixture consisting of derris powder, pyrethrum extract, 
and sulfonated castor oil with water was effective.— Howard and co- 
workers (294 , p. 31). 
Dust roses bearing this bug with copper-rotenone dust.— McDaniel 
(379). 
Against adults there was no significant difference in effective- 
ness between derris and pyrethrum, but both were more effective than 
a calcivun-arsenate-sulfur mixture.— Smith and coworkers (552) . 
A proprietary dust containing sulfur, derris, and nicotine was 
superior to others containing mainly derris, or derris and nicotine, 
but its action was probably repellent to this species on chrysanthemums 
in England.— Orohard (451) • 
