THE DIFFERENTIAL L0CU8T. 
21 
Attention was first called to the L904 outbreak by Mr. W. II. 
Brown, of Navasota, whose plantation lying along the Brazos River 
was visited by the writer April 1. At this time the young hoppers 
had been at work for about ten days, and were still hatching. They 
occurred in countless numbers around the edges of cultivated fields 
and on uncultivated ground among the weeds, from which they were 
migrating to the young crops as the food supply became scarce. In 
iome c;c i 1 
Fig. 10.— Melanoplus differentialis: young nymph — enlarged (author's illustration |. 
such situations old logs were so covered with the young as to be com- 
pletely blackened by them. The "stand*' of young corn and cotton 
had already been destroyed over several acres. In one field, where 
they first appeared, Mr. Brown had used dry Paris green and had 
largely checked the injury. It was found that by plowing fields where 
the stand had been badly injured or was poor, large numbers of the 
young hopperswere destroyed by burying, and the remainder migrated 
to the weeds at the edges of the fields. While still young they can not 
be readily driven as is possible when they are half or more nearly 
grown. All of the vegetation around the edges of the fields was 
therefore poisoned with Paris green or green arsenoid. In 
the poison was mixed with flour, which 
made it more adhesive. Over the fields, 
both those which had been plowed and 
those wherein the hoppers were feeding, 
poisoned bran mash was distributed. 1 
pound of Paris green being mixed with 25 
pounds of bran. This treatment proved 
exceedingly effective. Five days later, when again visited, the great 
majority of the hoppers were found dead among the weeds which 
had been thoroughly poisoned. The ('Meet of bran mash is not so 
apparent, as the hoppers after eating it crawl beneath small clods oi 
earth and there die, but by examining the ground around a small pile 
of the mash from 12 to 20 dead hoppers were found, and many more 
had doubtless died farther away. To moisten the mash, water is found 
as effective as molasses. Around the edges of the fields, and in patches 
of weeds on uncultivated land, a spray oi pure kerosene or oi strong 
Fig. 11. — Eggma°sof Mdanopl* s 
entkilis— enlarged author's illus- 
tration i. 
