. Annual report of the Commissioner of Agriculture ... Agriculture -- New York (State). 576 Grasses and Leguminous Crops in New York with a sticky substance secreted by special glands and the fluid is then mixed with air and worked into a frothy mass by a pair of appendages at the tip of the body. The frothy mass is supposed to serve as a protection for the insect against its enemies. While these curious spittle insects often attract attention and provoke inquiry they really do very little harm and remedial measures are not necessary. TIMOTHY JOINT WORM Isosoma species If one splits a timothy
. Annual report of the Commissioner of Agriculture ... Agriculture -- New York (State). 576 Grasses and Leguminous Crops in New York with a sticky substance secreted by special glands and the fluid is then mixed with air and worked into a frothy mass by a pair of appendages at the tip of the body. The frothy mass is supposed to serve as a protection for the insect against its enemies. While these curious spittle insects often attract attention and provoke inquiry they really do very little harm and remedial measures are not necessary. TIMOTHY JOINT WORM Isosoma species If one splits a timothy culm lengthwise he is likely to find a small white larva one-twelfth inch in length lying in the central cavity just above one of the lower nodes (Fig. 619). Sometimes the infested stems are slightly dwarfed but more often they are the largest and rankest arising from the stool. The insect really does not injure the hay crop to any appreciable extent. Timothy grass along fences and in waste places is more liable to infesta- tion ; one-year-old seeding is in- fested only to a slight extent. The insect winters in the larval state either in grass stems left along the edge of the field or those cut for hay. The insect trans- forms to a pupa in the stem in May and the small, black, four- winged flies emerge the last of the month. The -female fly inserts her eggs in the tender stems of the growing timothy plants and the young larvae feed on the pith just above a joint. There is only one brood annually. No remedial measures are \ Fig. (il9. Timothy In Its Burrow in a Grass Stem, Greatly Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York (State). Dept. of Agriculture; New York State Agricultural Experiment Station; Cornell University. Agricultural Experiment Station. Albany
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