. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. CHAPTER XV The Two-winged Parasites In the great order of two-winged flies (Diptera) there are many parasites of other insects. A large proportion of these belong to the family of Tachina Flies (Tachini- dae). These are mostly insects of moderate size, similar in appearance to the common house fly but' usually some- what larger. These Tachina parasites have long been recognized as among the most important enemies of such smooth-skinned caterpillars as cutworms and army wor
. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. CHAPTER XV The Two-winged Parasites In the great order of two-winged flies (Diptera) there are many parasites of other insects. A large proportion of these belong to the family of Tachina Flies (Tachini- dae). These are mostly insects of moderate size, similar in appearance to the common house fly but' usually some- what larger. These Tachina parasites have long been recognized as among the most important enemies of such smooth-skinned caterpillars as cutworms and army worms, often destroying millions of. these pests at the time of a single outbreak. Tachinid of Army-worm The life history as shown by the species that in- fests the army worm is briefly this: The adult flies de- posit their oval whitish eggs upon the outside of the skin of the caterpillar. These eggs shortly hatch into tiny larvae by burrowing through the eggshell and also through the skin of the caterpillar, finding lodgment among the body tissues. Here they rapidly develop into whitish foot- less maggots that finally kill the host and emerge to change to the pupa state at or near the surface of the soil. They soon again change to adult flies to continue the generation of the parasite. i88. 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 Weed, Clarence Moores, 1864-1947. Boston ; New York : D. C. Heath & Co.
Size: 1581px × 1581px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbenefic, bookyear1910
