Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 THE I A-SECT WORLD. 137 the door closed, and bisulphide evaporated Iroiii a vessel hung up just below the top of the box. As the vapors descend, they will kill the inserts infesting the plants, which may then be sent out free from all insect troubles. One dram of liquid per cubic foot of space will be about the right quantity not likely to hurt vege- tation, while killing all lice by the time the liquid ha
Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 THE I A-SECT WORLD. 137 the door closed, and bisulphide evaporated Iroiii a vessel hung up just below the top of the box. As the vapors descend, they will kill the inserts infesting the plants, which may then be sent out free from all insect troubles. One dram of liquid per cubic foot of space will be about the right quantity not likely to hurt vege- tation, while killing all lice by the time the liquid has entirely evaporated. The 'jumping plant-lice' are so called from their habit of leaping readily, though, as a matter of fact, their resemblance is rather to the tree-hoppers, and most of all they recall a miniature Fig. 99.
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Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
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