EXPERIMENT STATION EEPORT. 523 



wanned surface than on one that is dead cold. This insect is suffi- 

 ciently destructive when present in large numbers to make it worth 

 while for those fruit growers that are threatened to use effective 

 measures to check it. 



InBeots on Field Crops. 



The occurrence of the army ivorm at Woodbine in late August 

 was interesting, because it was the first time since 1896 that the 

 insect has injured field crops. It is occasionallj found on grassy 

 cranberry bogs and sometimes eats the vines when the grass has 

 been destroyed, but on well-kepit bogs, pToperly ditched, the injury 

 is usually slight. As there is some reason to fear that the insect, 

 may appear again in 1907, and perhaps over a greater area, a 

 brief record of this year's occurrence and some suggestions as to- 

 remedial measures are given on a later page. 



Associated with the common species was the fall army worm,. 

 Laphygma< frugiperda, which also seemed to be unusually abun- 

 dant, but would not of itself have been noticeable or injurious. 



The corn-stall- borer was not nearly so abundant as it was dur- 

 ing the season of 1905. iN'othing was added to the life history 

 given in the last rejx^rt and no experiments looking toward its 

 destruction were made, nor was anything done by farmers, so far 

 as I have been able to ascertain, so' that the lessened numbers are 

 due to natural causes alone. Some report of injury to corn was- 

 received, however, and near Newark the larvse were found boring 

 in bean and in pansy plants. There seems to be no reason to^ 

 expect any immediate recurrence of the injurious increase of 1905- 



Cabbage irorms were abundant in many parts of the State and 

 complaint of injury done by them was received as early as July 

 Gth. As the season advanced the injury became more notable, and 

 in early fall it was easy to recognize their presence by the ragged 

 outer leaves into which holes of all sizes had been eaten. The 

 methods of dealing with these insects are so well known and 

 effective that it depends upon the fanner himself how much loss 

 he suffers from them. 



Grasshoppers were re}X)rted as being injurious in Morris counts" 

 early in the season and occurred in great numbers near Chester, 

 but before any serious harm had been done they became victims of 

 disease, and in July many dead specimens were found clinging to- 

 the stalks of grasses, kc. Ordinarily, these insects do not become 



