t <
The winter is passed in the adult stage and the beetles are O
among the first insects in spring to start feeding on green plants f I
in the field. As soon as their favorite food plants, such as T
squash, beans, melons and cucumbers appear above grounll, l
they transfer their attacks to them. So eager a1·c they to feel 5
on these plants that they often burrow into the ground to meet  
the young plant coming thru the soil.  
The injury to the seedling and leaves is shown in the accom-  
panying illustration. Entire stands of—these crops sometiines  
are destroyed in a few days by the beetles. In addition to the  
damage to the plants by feeding, the insects spread a disease  
among the plants, known as mosaic or wilt, that is as destructive 1
as the feeding habits of the beetle. l
The insects breed in the ground, selecting, where possible.  
rich, damp soil. The immature form, or larva, feeds on the  
underground portion of the plant, becoming full grown in tive  
or six weeks. There are two or more generations per year an·l  
the beetles of the last generation feed on the flowers and fruits ‘
of the crops mentioned above.  
To control the pest, use a well-mixed dust made of one  
part of calcium arsenate and 15 parts of gypsum 01`l2lll(l—])ltlSl<‘l'. l
The latter will have hair in it when received from a builders    
supply company. lt should be screened before using. The dust   W
can be applied with a gunny sack. Since the beetles often attaela  
the plant before it comes thru the ground, the first application i
should be made before the plants can be seen. Additional appli- l
cations should be made at three- or four-day intervals, until the   sf.;
plants are beyond the critical stage. Often 15 to 20 fl'(’ZlllIll’1liS    
are necessary. ·
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