TRUCK CROP INSECTS. 67 
of destruction by wetting the lawn thoroughly as the disease 
rapidly develops under humid conditions, killing off the grubs. 
Tobacco extract is also of value in destroying grubs in the lawn. 
A quickly available fertilizer is of value in enabling the plants 
to recover. 
The grubs will be bad during next summer and during the 
early part of the summer of 1916 and will emerge again as adults 
in great abundance in 1917. Unfortunately, it is difficult for the 
farmer to realize that he should destroy these June beetles to save 
his crops from an attack of white grubs. A very few no doubt have 
been collected and destroyed by the farmer at the time they were 
abundant during the last year. 
To show the value of what could be done: on June Ist the 
author and two assistants collected in one hour’s time, in Still- 
water, around the electric lights, 1,928 beetles, of which 1,424 were 
females, with an average number of 52.7 with eggs which had not 
been laid. By the destruc-- 
tion of these beetles, it can 
be estimated that nearly a 
million eggs were destroyed 
which would have produced 
a million young white grubs. 
Cabbage and Onion Mag- 
‘gots: Two other insects 
which attracted considerable 
attention during the sum- 
mer were the cabbage and 
onion maggots. They are 
of increasing importance 
each year in Minnesota and 
although work was started 
to advise a new treatment 
for these pests, it has not 
continued far enough to pub- 
lish satisfactory results. By 
another season no doubt 
more satisfactory results will 
be obtained. Notes on this 
work were published in Min- 
nesota, Insect Life, August, 
1914 Fic. 10. Melon leaves curled by attacks of lice. 
‘ Chittenden, Bur. Ent. U.S. Dep. Agr. 
