. Elements of Philippine agriculture. Agriculture. 56 PHILIPPINE A GRICUL TURK Islands a fungus which it is hoped will kill them. Several years ago a man in Negros got some of this fungus from Africa, and killed great swarms of locusts within a few days. A common way of killing night- flying insects, such as the maize moth, is to put lamps in the field, with a pan of kerosene under each. The in- sects are attracted to the light, and fly against it, and then fall into the kerosene. This kills all night-flying insects, some of which are useful; but in fields where the harmful insects are numerou
. Elements of Philippine agriculture. Agriculture. 56 PHILIPPINE A GRICUL TURK Islands a fungus which it is hoped will kill them. Several years ago a man in Negros got some of this fungus from Africa, and killed great swarms of locusts within a few days. A common way of killing night- flying insects, such as the maize moth, is to put lamps in the field, with a pan of kerosene under each. The in- sects are attracted to the light, and fly against it, and then fall into the kerosene. This kills all night-flying insects, some of which are useful; but in fields where the harmful insects are numerous a great many more of them are caught than of the useful insects. Killing by Poisons. Some substances arc disagreeable or poisonous to animals but not harmful to plants. Tobacco juice and arsenic are such substances. If tobacco leaves are boiled in a little water, so as to make a strong juice, and plants or leaves are washed with this juice, insects will keep away from them. If arsenic is put on leaves, insects which eat them will die. It would cost too much to put these poisons on a field crop, like rice; but it often pays to use them on the more valuable gar- den and orchard crops. They are put on by spraying. The poison most generally used is Paris green, which contains copper and arsenic. Paris green can be bought. Fig. 39. Spraying machine. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Copeland, Edwin Bingham, 1873- [from old catalog]. Yonkers-on-Hudson, N. Y. , and Manila, World book company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagriculture, bookyear
