The European Corn Borer. 39 
for the corn borers to mature. For this reason beets should be grown 
in heavily infested regions only as an early crop and should not bo 
allowed to remain in the field after July 25 
No corn-borer infestation has been observed to date in rhubarb or 
beets grown under glass. 
PLANT QUICK-GROWING CROPS AND CROPS WHICH ARE NOT SUSCEPTIBLE. 
The crops grown on these market-garden farms can be handled in 
a manner to ‘prevent their becoming host plants for the corn borer 
to develop in. Crops that mature quickly, such as early bunch beets, 
spinach, and green beans, do not furnish favorable conditions for 
the development of large numbers of corn borers. Celery, tomatoes, 
potatoes, and peppers are not likely to be injured by the corn borer 
where the fields are kept free from weeds, and where corn or rhubarb 
is not grown in their immediate vicinity. 
Cabbage, carrots, cauliflower, cucumbers, dandelion, eggplant, let- 
tuce, onions, parsnips, peas, radishes, squash, and turnips are some 
of the market- garden crops which may be grown in any situation 
with very little danger of infestation by the corn borer. 
GENERAL METHODS OF SUPPRESSION AND CONTROL. 
Any method of suppressing or controlling the European corn borer 
necessitates the destruction of infested material. This may be done 
to the best advantage by burning, placing in silo, feeding to live 
stock, burying in heated manure, or spraying weeds with chemical, 
weed-killing solutions. 
BURNING INFESTED MATERIAL. 
The burning of cornstalks and stubble may best be done in the 
spring or in late winter when the stalks are in a dry condition, and 
considerable care should be used in the preparation of fires. Some 
arrangement is necessary whereby a draft can be obtained. This 
can be done by raising the material to be burned a few inches from 
the ground by the use of stones or otherwise. In the damp climate 
of eastern New England the burning of cornstalks is often attended 
with some difficulty. 
Where fields of corn stubble are located near wood lots, a few 
sticks of dry wood are always available and valuable in starting 
fires. The application of kerosene by means of ordinary watering 
pots helps considerably in burning such material. Special atten- 
tion should be given to the entire ‘consumption by fire of all corn- 
stalks, cobs, and stubble. The process of shelling corn does not 
injure the borers contained in the cobs, and in infested regions all 
cobs should be burned immediately after shelling. Corn carried 
through the winter on the cob and not shelled before May 1 should 
be placed in a container, so that the moths can not escape after 
emerging. If a wire screen is used, one having at least 12 meshes 
to the inch will give satisfaction. 
The burning of weeds and crop remnants is easier, as such mate- 
rial will burn readily if left to dry in the sun for a day or two. 
Any weed or crop-remnant material should not be allowed to dry 
