. Agriculture for beginners. l Note difference in foliage and fruit on the sprayed and unsprayed halves, andthe difference in yield. From Bulletin No. 20 (Veg. Phys. and Path.),United States Department of Agriculture 117 CHAPTER VI ORCHARD, GARDEN, AND FIELD INSECTS SECTION XXIX —INSECTS IN GENERAL The farmer who has fought bugs on crop after cropneeds no argument to convince him that insects are seriousenemies to agriculture. Yet even he may be surprised to learn that the damagedone by them, as esti-mated by good author-ity, is as high as fourhundred million dollarsyearly for the UnitedStates
. Agriculture for beginners. l Note difference in foliage and fruit on the sprayed and unsprayed halves, andthe difference in yield. From Bulletin No. 20 (Veg. Phys. and Path.),United States Department of Agriculture 117 CHAPTER VI ORCHARD, GARDEN, AND FIELD INSECTS SECTION XXIX —INSECTS IN GENERAL The farmer who has fought bugs on crop after cropneeds no argument to convince him that insects are seriousenemies to agriculture. Yet even he may be surprised to learn that the damagedone by them, as esti-mated by good author-ity, is as high as fourhundred million dollarsyearly for the UnitedStates and Canada. Every one thinks heknows what an insect , however, we arewilling in this matter tomake our notion agreewith that of the peoplewho have studied insectsmost and know thembest, we must include among the true insects only such air-breathing animals as have six legs, no more, and have thebody divided into three parts, — head, thorax, and parts are clearly shown in Fig. io6, which represents ii8. Fig. io6. Ants ORCHARD, GARDEN, AND FIELD INSECTS 119 the ant, a true insect. All insects do not show the divisionsof the body so clearly as this figure shows them, but on Ovipositor
Size: 1486px × 1681px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherbosto, bookyear1904
