576 
robust. The pupae are first light, grad- 
ually becoming darker with age. 
Life History 
The adult beetles after hibernating or 
breeding in stored beans over winter ap- 
pear in the spring about the time the 
beans are blooming and lay their eggs 
upon the pods, in cracks at the end or in 
slits made by the female’s jaws. Upon 
hatching the young larvae bore through 
the pod or reach the beans’ within 
through a natural crack and begin to en- 
ter them by drilling a small hole, the en- 
trance of which either heals over or is 
so small as to be unobserved. Once within 
the bean the entire life history is spent 
there, the adults emerging at will by 
cutting a circular hole in the side. The 
adults of the first brood immediately be- 
gin egg laying upon the pods as did the 
hibernating females in the field, but if 
in storage bins or sacks the eggs are 
laid upon the seed beans or in old bur- 
rows. They thus continue to breed 
throughout the entire Summer and winter 
if the weather is not too cold, many gen- 
‘ erations appearing each year. 
Distribution 
This insect is generally distributed 
throughout the state, and is particularly 
troublesome in the central and southern 
counties where small beans are raised. 
Foods 
Nearly all varieties of beans are at- 
tacked by this weevil, though the small 
white and brown varieties are preferred. 
Limas are not usually affected, but occa- 
Sionally they are attacked. Peas are also 
included as a host. 
Control 
The first step in the control of this 
pest is to harvest the beans just as soon 
as possible, for those left in the fields 
are sure to become largely infested. If 
any of the insects are discovered the 
beans should be thoroughly fumigated 
with carbon bisulfid before they are 
stored. If weevils appear in the bins or 
sacks, fumigation should be resorted to 
at once. 
E. O. ESssic 
ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 
Fig. 1. The Work of the Bean Weevil on 
Small White and Lima Beans. (Original.) 
Bean Thrips 
Heliothrips fasciatus Pergande 
General Appearance 
The adult insect is black with head 
and thorax dark brown; antenne are 
whitish with tips dark; legs are black 
and yellow; front wings are blackish 
with white base; posterior wings uni- 
formly yellow with dark fringes. The 
young stages are lighter in appearance 
than the adult. 
Life History 
According to H. M. Russell, the insects 
hibernate in the adult stage only, under 
leaves, rubbish, etc. The eggs are in- 
serted in the leaves or tender stems. The 
young begin feeding soon after hatching. 
When ready to pupate the larvae seek 
shelter under rubbish or in the ground, 
where the nymphal stage is completed 
~ 
ZZ SSS 
“Z 
Fig. 1. Bean Thrips. (Enlarged) 
—After Russell 
