. Annual report of the Missouri State Board of Agriculture. Missouri. State Board of Agriculture; Agriculture -- Missouri. iNSECtS INJURIOUS TO CORN. 271 Tiie sod web-worms all pass the winter as hibernating, partially grown, larvae, which may be found inside of the webs or cases next to the base or stems of the infested plants, the case being stopped up at the upper end by silk thread and the inside lined with more silk. At the approach of warmi weather these larvae revfve and come forth to feed upon the grass or the corn plant, as the case may be. While most species of cut worms cut the corn
. Annual report of the Missouri State Board of Agriculture. Missouri. State Board of Agriculture; Agriculture -- Missouri. iNSECtS INJURIOUS TO CORN. 271 Tiie sod web-worms all pass the winter as hibernating, partially grown, larvae, which may be found inside of the webs or cases next to the base or stems of the infested plants, the case being stopped up at the upper end by silk thread and the inside lined with more silk. At the approach of warmi weather these larvae revfve and come forth to feed upon the grass or the corn plant, as the case may be. While most species of cut worms cut the corn plant down in the spring of the year by eating it off near the surface of the ground, the sod web-worms rarely ever cut a plant down, but feed upon it and kill it as above described. When one finds the sod web-worm, they can be distinguished from cutworms by the fact that when disturbed they will try to get away as rapidly as possible, while a cutworm when dis- turbed will curl up and remain sluggish. But of course the corn grower can, by looking about the base of the corn plants, find the webs or cells of these insects and usually find the larvae in them, in which case he can readily determine the cause of the injury. By even pulling up the young corn plants the case can be readily found. The sod web-worms, like our cutworms, prefer to feed at night, but will also feed on dark days, usually passing the daytime inside of their tubes, which tubes, when they contain full grown larvae, are usually from one and one-half to two inches long and about one-half inch in width. Two species of the sod web-worms in the larval condition are shown enlarged in figures 29 and 31. The methods of fighting the sod web-worms are very similar to those described for cutworms, the dift'erence being mainly in the time of the applica- tion of the methods of procedure. Sod land that is badly infested with these insects should be plowed in the early part of September, if the field is in- tended for corn
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