P The Colorado Experiment Station 
o/'panting* the CS^S M S ? as 1° P^de any chance 
soil that were sterilized with steam^amTth ^ r ° Wn In pots of 
boiled water. When the mWc f ’ - * , 6 p ants watered with 
were inoculated w unlus Rilil" P ° tS part of 
produced, while the cl eck w? e S ec lv’freeT SCab Was 
know that scab may be produced S r fr ° m SCab ' As we 
present in all our soils m i r ° m a tlm §' us ’ Rhizoctonia, 
treatment of the seed ^ h ° pe t0 eradic ate scab by any 
cultural methods are the only prevendvfnTeasw^th f a " d 
ZZ See Und6r Seed and Treatment, a report of field 
POTATO INSECTS 
By S. ARTHUR JOHNSON 
the COLORADO POTATO beetle, (. leptinotarsa decemlineata ) 
.o..,! rv 1 * °< *«* °< 
includes eastern Colorado Tn T V v0C vy moun tain range and 
.i.« »„<, mt £ fiT”rc£: ( b r/ , f, iira T" 
buffalo bur, but the beetle is n nit« , C - c 1Ie * °f these is the 
group including not only potatoes hutW W® 1 " ° n P ' antS of this 
and pepper. 7 P ° tatoes ’ but tomatoes, egg plant, tobacco 
eights'of m in1h~n h lLSra„d ee a trifleT 1 S 'W’ ^ ^ 
ground color is yellow and the tf, ""T 1 ' than Ion g- The 
running lengthwise There are al^w^ marked lj >' ten black lines 
The eggs are bright' yellow whenf° , , markin ? s 011 the thorax, 
under surface of the leaves when fresh and are generally laid on the 
each. The young are dark rlfn C f S COntain i n £ from ten to fifty 
Th 'S , Sr s l £ ^^.- wi “' b “ hea<b 
ground at a depth'of from'forwto sk 'inclZ™ Wh’^ A U ^ ly ” the 
d ::f ^en Ufssfis: 
on which they may feed’and ky eggT’ 6 TheT^rTn f °° d plants 
abundant every year nnrl A n ™ -a \, * , lile y ai e more or less 
The late crops 7 hi Colomdo ZnZT t0 earl y Potatoes. 
adult beetles die off before the notC escape ’ ecause most of the 
The e<™ s hatch P t Potatoes appear above ground. 
temperature. The larvae °feed°at fi° , lays de P endin g on the 
where they hatched' 1 ntci firSt ° n tbe surfac e of the leaf 
eat the tender young leaves whiclf™^ -° the f° P ° f the plant and 
1 6 ' eaves whlch are Jt>st unfolding. The young 
