INSECTS AND OTHER ANIMAL Pests [NJURIOUS TO FIELD BEANs 1011 
beetles caged over unsprayed beans served as a check. On July 24, eighteen 
of the twenty-five beetles were alive in the check cage but no live beetles 
could be found in the cage where arsenate of lead had been applied. Field 
experiments tested on a larger scale are listed in table 12. 
For the experiments recorded in table 12, 94 rows of beans were planted 
in the field, running from east to west. At least one check row was left 
alternating with the treated rows. A compressed-air sprayer was used in 
some of the experiments, but in treating rows 39, 40, 46, and 47, a hand 
pump on a wagon (fig. 95), with a spray boom feeding twelve nozzles and 
covering four rows, was used. It was impossible to keep up sufficient 
pressure to feed all of the nozzles with this pump, and so the outfit would 
be unfit for practical work unless the boom was attached to a power sprayer 
or to an efficient traction machine. The three nozzles to a row covered 
both the upper and lower surfaces of the bean leaves. At this time the 
plants were still very small, but it is quite possible to spray beans when the 
vines are more developed. A small hand machine operated by a crank was 
used in applying the dusts. 
Of the materials tested, the bordeaux-arsenate-of-lead spray gave the 
best results, but arsenate of lead alone was nearly as effective. It is appar- 
ent that arsenate of lead has good repellent qualities in addition to its 
killing power. Sprays of limewater, sulfur, and fish-oil soap also repelled 
the beetles, tho to a less extent; and several of the fertilizers dusted on the 
plants kept off some of the insects. 
If beans become heavily infested with flea beetles in July, when the plants 
are small, and if growth is slow because of dry weather, spraying with the 
bordeaux-arsenate-of-lead m xture or with arsenate of lead alone is bene- 
ficial. If suitable machinery is not available for spraying, the plants may 
be dusted with lime or with a combination of arsenate of lead and lime. 
In all cases the wild hosts should be removed from fence corners, from the 
sides of the field, and om the field itself, soon after oviposition is finished 
-in September. 
THE GREEN CLOVER WORM 
(Plathypena scabra Fab.) 
During July and until October of 1919, the green clover worm (Plathy- 
pena scabra, (Lepidoptera, Noctuidae) was very common on field beans in 
New York. The larvae of this snout moth may be found in small numbers 
on beans in almost any year, but only occasionally is it a serious pest. 
= 1917 and 1918 the writer found only four larvae of this species on 
eans. 
Among the many hosts of the green clover worm are beans, lima beans, 
soybeans, peas, cowpeas, vetch, clover, alfalfa, strawberry, blackberry, 
tickweed, ragweed, smartweed, and wild carrot. The larvae that have 
been found on field beans in New York apparently belong to the second 
