Florida Agricultural Experiment Station


 It is recommended that, in using the lead arsenate spray, 2
pounds of lime be added to the liquid to prevent burning.
 If spraying with bordeaux mixture at this time, the arsen-
ical, either lead or calcium arsenate, or paris green, may be
added to the bordeaux.
 Instead of spraying, the tomatoes may be dusted. This can
be done more quickly than spraying if one has a suitable duster.
Either lead arsenate, mixed with from 2 to 4 times its weight
of air-slacked or hydrated lime, or calcuim arsenate may be used.
 Corn as a Trap Crop.-The bollworm prefers corn, especially
sweet corn, to any other crop grown in Florida. During the
summer of 1914, some successful results were obtained in the
use of sweet corn as a trap crop. On one small plot of toma-
toes planted next to sweet corn which was just coming into
silk when the earliest tomatoes were forming, there were no
worms at all, while a field a quarter of a mile away averaged
20 percent infested fruit. Observations would indicate, how-
ever, that the corn must be planted very close to the tomatoes
to provide protection. We recommend that 10 to 20 rows of
tomatoes alternate with 2 rows of corn. If a single row of
corn is planted across the field it usually does not get thoroughly
pollinated and the ears will not be sufficiently attractive to
prevent the caterpillars from wandering to the tomatoes. Also
the corn must be planted at such a season as to be in an at-
tractive condition when the first tomatoes are forming, that is,
it must have young silks, otherwise the insect prefers the toma-
toes. This corn must be destroyed before it has matured
enough to be unattractive to the worm, otherwise it will in-
crease rather than decrease the number of worms in the toma-
toes. Many larvae will crawl from the corn to the tomatoes,
and many moths whose larvae matured on the corn will emerge
from the cocoons and fly to the tomatoes. The corn can be left
until the ears are sufficiently mature for roasting purposes, but
by no means should they be left to ripen in the tomato field.
Cowpeas planted in the corn will afford shade in which the
moths can hide during the day, and thus make the trap crop
more attractive to the moths and increase its efficiency.
 Destroy Wormy Fruit.-All wormy fruit should be picked
 and removed from the field, and so disposed of as to destroy the
 larvae. Stock, hogs, and chickens will eat a limited amount of
 these wormy tomatoes, especially if they do not have access to
 other green food. Where the acreage of tomatoes is large, the