— 46 — 
one day will, a few days later, be standing up free from the 
head. 
For those who object to using poison, I would recom- 
mend insect powder (Pyrethrum) which is the best used dry 
in a small bellows by means of which the powder is driven 
down among the bases of the leaves to reach all the worms. 
This substance must be put onto the worms in order to kill 
them. 
If much poison has been used it will not do to turn stock 
into the patch to eat the leaves and stumps after the crop 
has been gathered. 
THE CABBAGE PLUTELLA. a ct'uciferarum- Zell.) 
This insect is a small moth, less than half of an inch in 
length and with narrow wings that have a white inner mar- 
gin and when closed make a conspicuous white line along 
the back as shown in the accompanying figure. The larvae 
are correspondingly small and are very active, wriggling 
Pig. 41. -Tlie Cabbage Plutella: a, larva; d, cbr^salie; e, silken cocoon 
'vviih chrysalis inside; h, moth with wings closed; f, moth with wings spread. All 
•enlarged atiout twice. (After Riley.) 
themselves quickly off the leaves when disturbed and drop- 
ping on a silken thread. When fully grown the larva spins 
a delicate white cocoon among the leaves. These I have 
found as early as June loth at P'ort Collins and the moths 
have appeared in our breeding cages as early as June i6th. 
I'here are two, and perhaps three, broods in a season. 
Remedies- -The same as for the preceding species. Ap- 
[)\y early so as to kill the first brood. 
Phere are three other “worms” that feed upon cabbages 
to some extent in the state, but I will not give them special 
mention as the remedies are the same as for the species 
above mentioned. 
