1020 I. M. HAaw.ry 
Reports of injury to the bean crop by this insect were received from Fulton, 
Lewis, Madison, Essex, and Warren Counties. The principal injury 
results from the active feeding of the long-legged, grayish brown, adult 
beetles, which have been reported as destroying as much as 40 per cent 
of the leaves. Injury from this pest in 1917. was reported between June 
28 and August 2. 
On grapes, a spray of arsenate of lead (4 pounds of paste to 50 gallons 
of water or bordeaux mixture, with the addition of 2 gallons of cheap 
molasses) is said to be the most effective method of control. This should 
control the insect on beans also. The spray must be applied thoroly as 
soon as the first beetles are seen, and repeated if rains wash off the first 
application. Every leaf should be covered, and as a new growth develops 
this also should be coated with the spray. 
THE SOUTHERN CORN ROOTWORM 
(Diabrotica duodecimpunctata Fab.) 
The small, yellowish green beetle (Plate LX XI, 7) known in the South as 
the southern corn rootworm, Diabrotica duodecimpunctata (Coleoptera, Chrys- 
omelidae), and sometimes called the twelve-spotted asparagus beetle, is 
occasionally present in small numbers on beans in New York. In 1917 
it was reported to be causing some injury to the leaves. The parent 
insect 1s a general feeder and may be found on many cultivated crops 
as well as on weeds that occur in and around fields and gardens. 
In the South the larvae feed underground on corn and cause immense 
losses by killing the developing bud. The insects have been found attack- 
ing the roots of beans in New York, but there have been so few of them 
present that the damage to this crop has been negligible. The feeding 
of the parent beetle on the foliage may be controlled by a spray of arsenate 
of lead, 2 pounds of paste to 50 gallons of water. 
THE BEAN LEAF BEETLE 
(Cerotoma trifurcata Forster) 
Each year a few specimens of the bean leaf beetle, Cerotoma trifurcata 
(Coleoptera, Chrysomelidae), have been found on beans in western New 
York, but they have not been present in sufficient numbers to cause ap- 
preciable damage. The parent beetle (Plate LX XI, 9) is about one-third 
of an inch in length, and is yellowish in color, with a black head and 
black markings on the wing covers. 
The bean leaf beetle has been found on beans from July until the middle 
of September. It has been noticed also on ragweed and lamb’s-quarters 
growing in bean fields, and on carrot tops near by. Bush clover, hog 
peanuts, and beggarweed are likewise reported as hosts. At rare intervals 
the insect appears in parts of this and other States, destroying field and 
garden beans, soybeans, and cowpeas by feeding on the leaves. 
