 | 1877 - 326 páginas
...swell and the plant to turn yellow and die. By the end of November, or from thirty to forty days alter the wheat is sown, they assume the "flaxseed" state,...remain in the wheat until during warm weather; in April the larva rapidly transforms into the pup:i within its llaxseed skin, the ilv emerging from the llaxsecd... | |
 | Illinois. Department of Agriculture - 1881 - 966 páginas
...stalk to swell and the plant to turn yellow and die. By the end of November, or from thirty to forty days after the wheat is sown, they assume the "flaxseed"...remain in the wheat until during warm weather; in April the larva rapidly transforms into the pupa within its flaxseed skin, the fly emerging from the flaxseed... | |
 | Wisconsin State Horticultural Society - 1881 - 364 páginas
...or from thirty to forty days after the wheat is sown, they assume the " flax-eed " (Fig. 24-4 and 6) state, and may, on removing the lower leaves, be found...than grains of rice. They remain in the wheat until warm weather; in April the larva rapidly transforms into the pupa within its flaxseed skin, the fly... | |
 | Wisconsin State Agricultural Society - 1881 - 512 páginas
...from thirty to forty days after the wheat is sown, they assume the " flaxseed " (Fig. 24 — 4 and 6) state, and may, on removing the lower leaves, be found...than grains of rice. They remain in the wheat until warm weather; in April the larva rapidly transforms into the pupa within its flaxseed skin, the fly... | |
 | Wisconsin State Horticultural Society - 1881 - 362 páginas
...or from thirty to forty days after the wheat is sown, they assume the " flax^eed " (Fig. 24-4 and 6) state, and may, on removing the lower leaves, be found...than grains of rice. They remain in the wheat until warm weather; in April the larva rapidly transforms into the pupa within its flaxseed skin, the fly... | |
 | Mary Treat - 1882 - 300 páginas
...causing the stalks to swell and the plant to and die. By the end of November, or from thirty forty days after the wheat is sown, they assume the "flaxseed...flaxseed-skin, the fly emerging from the " flaxseed" case about Fig. 85. — THE HESSIAN FLY (Cecidomyia destructor, Say.) (, Fly of natural size; h, the same, magnified;... | |
 | United States Entomological Commission - 1883 - 612 páginas
...stalk to swell and the plant to turn yellow aud die. By the end of November, or from thirty to forty days after the wheat is sown, they assume the "flaxseed*...in the wheat until during warm weather ; in April the larva rapidly transforms into the pupa within its flaxseed skin, the fly emerging from the flaxseed... | |
 | United States Entomological Commission - 1883 - 614 páginas
...stalk to swell and the plant to turn yellow and die. By the end of November, or from thirty to forty days after the wheat is sown, they assume the " flaxseed...in the wheat until during warm weather ; in April the larva rapidly transforms into the pupa within its flaxseed skin, the fly emerging from the flaxseud... | |
 | New Hampshire. Department of Agriculture - 1883 - 498 páginas
...stalk to swell and the plant to turn yellow and die. By the end of November, or from thirty to forty days after the wheat is sown, they assume the " flax-seed"...remain in the wheat until during warm weather. In April the larva rapidly transforms into the pupa within its flax-seed skin, the fly emerging from the flax-seed... | |
 | New Hampshire. Department of Agriculture - 1883 - 498 páginas
...stalk to swell and the plant to turn yellow and die. By the end of November, or from thirty to forty days after the wheat is sown, they assume the " flax-seed"...remain in the wheat until during warm weather. In April the larva rapidly transforms into the pupa within its flax-seed skin, the fly emerging from the flax-seed... | |
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November, or from thirty to forty days after the wheat is sown, they assume the " flax-seed" state, and may, on removing the lower leaves, be found as little brown, oval, cylindrical, smooth bodies, a little smaller than grains of rice. They remain in... 
