. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 22 In their life history blister beetles differ greatly from other Cole- optera in that they undergo a more complicated series of metamor- phoses which will be explained and illustrated in the account of the striped blister beetle which follows. Blister beetles are not an unmixed evil, since they do some good in their larval stage to compensate in a measure for the harm the beetles occasion to our crops, for the habit of the larvae of destroying grass- hopper 3ggs renders them of material aid in keeping these per
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 22 In their life history blister beetles differ greatly from other Cole- optera in that they undergo a more complicated series of metamor- phoses which will be explained and illustrated in the account of the striped blister beetle which follows. Blister beetles are not an unmixed evil, since they do some good in their larval stage to compensate in a measure for the harm the beetles occasion to our crops, for the habit of the larvae of destroying grass- hopper 3ggs renders them of material aid in keeping these pernicious insects in This is especially true in the Western States, where both blister beetles and grasshoppers abound. But the benefits derived are really more than counterbalanced by the losses occasioned in fields and gardens; hence, insecticides and other measures should be employed to destroy the l)eetles when they occur in harmful numbers. As blister beetles are to be found in practically all fields of sugar beet, and are among the most prominent enemies of this plant, it is purposed to consider several of the most abundant species. THE STRIPED BLISTER BEETLE. (Epicauia vittuta Falj.) Before the advent of the Colorado potato beetle in the East this was our most destructive potato insect, and probably because it is also. b e Fig. 13.—Epicauta rittata: a, female beetle; b, eggs; c, triungulin larva; d, second or caraboid stage; e, same as /, doubled up as In pod; /, scarabieoid stage; g, coarctate larva—all except e enlarged (after Riley, except a; original, Division of Entomology). striped is often called the " old-fashioned potato ; It is abundant and well known east of the Rocky Mountains, of common occurrence on sugar and table beets, and as its life histor}^ is typical of injurious forms of this group it may properly receive first attention. The beetle can be easily identified by means of the illustration (fig. 13, a). It is about half an inch l
Size: 2347px × 1065px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectentomology, booksubjectinsects, booky
