ila 
_or farming, early fall plowing, keeping down -weeds. and crop rota- 
tion where practicable. 
Finally, it should be stated that unless remedial measures be 
adopted and thoroughly and repeatedly applied as often as neces- 
sity demands, the red spider is almost certain to do permanent harm 
to delicate plants, since as soon as the plants become badly infested 
they seldom, if ever, fully recover. 
Approved: 
James Wiuson, 
Secretary of Agriculture. 
Wasuinecton, D. C., November 30, 1908. 
[Cir. 104] 
O 
