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" Rust-mite the difficulty in killing the eggs compels us to adopt one of two alternatives. We must either use powerful insecticides, in solutions even stronger than are required for scale-insects, or else make several applications, at short intervals,... "
Florida Fruits and how to Raise Them - Página 124
por Helen Harcourt - 1886 - 347 páginas
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report of the u. s. dept. of agriculture, commissioner of agriculture for ...

government printing office - 1884 - 732 páginas
...as afresh crop of adult mites and eggs will be produced in two or three days. In combating Bust-mite the difficulty in killing the eggs compels us to adopt...insecticides, in solutions even stronger than are required for scale-insects, or else make several applications, at short intervals, of washes competent to kill the...
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Report of the Commissioner of Agriculture for the Year ...

United States. Department of Agriculture - 1884 - 760 páginas
...as afresh crop of adult mites and eggs will be produced in two or three days. In combating Rust-mite the difficulty in killing the eggs compels us to adopt...insecticides, in solutions even stronger than are required for scale-insects, or else make several applications, at short intervals, of washes competent to kill the...
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Report of the Secretary of Agriculture ...

United States. Department of Agriculture - 1884 - 756 páginas
...afresh crop of adult mites and eggs will be produced in two or three days. In combatí ig Rust-mite the difficulty in killing the eggs compels us to adopt...insecticides, in solutions even stronger than are required for scale-insects, or else make several applications, at short intervals, of washes competent to kill the...
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Report of the Commissioner of Agriculture for the Year ...

United States. Department of Agriculture - 1884 - 744 páginas
...in two or three days. In combating Bust-mite the difficulty in killing the eggs compels us to addpt one of two alternatives. We must either use powerful...insecticides, in solutions even stronger than are required for scale-insects, or else make several applications, at short intervals, of washes competent to kill the...
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Insects Affecting the Orange

Henry Guernsey Hubbard - 1885 - 278 páginas
...a fresh crop of adult Mites and eggs will be produced in two or three days. In combating Bust- mite the difficulty in killing the eggs compels us to adopt...insecticides, in solutions even stronger than are required for Scale-insects, or else make several applications, at short intervals, of washes competent to kill the...
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Florida Fruits and how Raise Them

Helen Garnie Warner - 1886 - 366 páginas
...can be accomplished, as a fresh crop of adult mites and eggs will be produced in two or three days. stronger than are required for scale insects, or else...freed of mites, by killing the young as they hatch, aud not allowing any to reach the adult stage and produce a fresh crop of eggs. The following substances...
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Annual reports of the Department of Agriculture. 1884

1884 - 814 páginas
...as afresh crop of adult mites and eggs will be produced in two or three days. In combating Rust-mite the difficulty in killing the eggs compels us to adopt...insecticides, in solutions even stronger than are required for scale-insects, or else make several applications, at short intervals, of washes competent to kill the...
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