 | 1877 - Liczba stron: 326
...the flaxseeds contained in the straw, and appear in spring. Xow, to burn the stubble in the antumn or early spring is simply to destroy these useful...energies towards clearing up the subject of rearing and multiplying these insect hosts. Much knowledge and practical skill is needed in this direction,... | |
 | Illinois. Department of Agriculture - 1881 - Liczba stron: 966
...part these parasites live in the flaxseeds contained in the straw, and appear in spring. Now, to bum the stubble in the autumn or early spring is simply...energies towards clearing up the subject of rearing and multiplying these insect hosts. Much knowledge and practical skill is needed in this direction,... | |
 | United States Entomological Commission - 1883 - Liczba stron: 612
...already described. For the most part these parasites live in the flaxseeds contained in the straw, and appear in spring. Now, to burn the stubble in...energies towards clearing up the subject of rearing and multiplying these insect hosts. Much knowledge and practical skill is needed in this direction,... | |
 | New Hampshire. Department of Agriculture - 1883 - Liczba stron: 498
...already described. For the most part, these parasites live in the flaxseeds contained in the straw, and appear in spring. Now, to burn the stubble in...energies towards clearing up the subject of rearing and multiplying these insect hosts. Much knowledge and practical skill is needed in this direction,... | |
 | United States Entomological Commission - 1883 - Liczba stron: 612
...already described. For the most part these parasites live in the flaxseeds contained in the straw, and appear in spring. Now, to burn the stubble in...energies towards clearing up the subject of rearing and multiplying these insect hosts. Much knowledge and practical skill is needed in this direction,... | |
 | New Hampshire. Department of Agriculture - 1883 - Liczba stron: 498
...already described. For the most part, these parasites live in the flaxseeds contained in the straw, and appear in spring. Now, to burn the stubble in...energies towards clearing up the subject of rearing and multiplying these insect hosts. Much knowledge and practical skill is needed in this direction,... | |
 | Royal Entomological Society of London - 1891 - Liczba stron: 722
...already described. For tbe most part, these parasites live in the ' flax-seed ' contained in the straw, and appear in spring. Now, to burn the stubble in...be untouched. On the contrary, the parasites should bo gathered and bred in numbers, and we believe that practical entomologists should bend all their... | |
 | Royal Entomological Society of London - 1891 - Liczba stron: 684
...already described. For the most part, these parasites live in the ' flax-seed ' contained in the straw, and appear in spring. Now, to burn the stubble in...be untouched. On the contrary, the parasites should bu gathered and bred in numbers, and we believe that practical entomologists should bend all their... | |
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As previously stated, most probably nine-tenths of the young Hessian Flies are destroyed in the larva or pupa state by the parasites already described. For the most part these parasites live in the flaxseeds contained in the straw, and appear in spring.... 