New YorkK AGRICULTURAL EXPERIMENT STATION. 245 
resin mixture yielded 100 per ct. better than the untreated plats and 
at least 60 per ct. better than those dusted with paris green and 
flour. The bordeaux mixture even when united with paris green, 
and the paris green and flour were of little advantage against the 
loopers, though quite effective against the common cabbage worm. 
To make two applications upon ten acres of late cabbage after 
the plants are two-thirds grown would require materials worth $5.00, 
time in preparing stock solution 75 cents and 10 days’ labor which 
at $1.50 a day would be $15.00, a total of $20.75 or about $2.00 per 
acre for treatment, which will insure almost perfect freedom from 
injury by the worms. 
CABBAGE LOOPER. 
(Autographa brassicae Riley.) 
This is a native moth® and its injuries on late cabbage are fre- 
quently confused with the work of the common cabbage worm. 
It undoubtedly does more damage to late cabbage and lettuce on 
Long Island than the latter species, as in this locality it is not 
checked by parasites. The larva is especially destructive to lettuce 
when it is transplanted from cold frames or open beds to the 
forcing house. The caterpillar is not provided with prolegs on the 
sixth and seventh segments like most Noctuids, so in traveling over 
the surface of the leaf they loop the body like the ‘“ Measuring 
Worms” or “ Geometers.” From this habit they are often called 
“Cabbage Loopers”’ in distinction to the common cabbage worm. 
Protection from this pest is afforded by the use of the remedies 
employed for the preceding species. 
DIAMOND-BACK MOTH. 
(Plutella maculipennis Curtis.) 
In some plantations this insect® occurs in numbers sufficient to 
do a great deal of damage to rape and turnips. It is also known 
to feed on cabbage, cauliflower and Brussels sprouts. The cabbages 
are injured principally in the early part of the season. Thorough 
treatment of cabbage as previously described will control this 
species. 
CABBAGE APHIS. 
(Aphis brassicae L.) 
ec 5] 
The cabbage aphis® or “ greenfly,” as it popularly is designated, 
is a serious pest of the cabbage, and in some seasons it is responsible 
* Bul. 83; same in Rpt. 13:737-766 (1894). 
