. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. IT fntnre oae; they •hould be put on u «oon u tho plants are net out and left until they are well-grown. The frames not only prevent tho flics from laying their eggs on the plants, but also keep off the other insects which are liable to attack them. Another method of protection, which is now largely employed and is found very effective, is th«» use of tarred felt paper discs, which arc placed around the stems of the young plants when they are being sot out. These discs should be made of one-ply p
. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. IT fntnre oae; they •hould be put on u «oon u tho plants are net out and left until they are well-grown. The frames not only prevent tho flics from laying their eggs on the plants, but also keep off the other insects which are liable to attack them. Another method of protection, which is now largely employed and is found very effective, is th«» use of tarred felt paper discs, which arc placed around the stems of the young plants when they are being sot out. These discs should be made of one-ply paper, not of the thick tarred building paper. For garden pur- poses the paper nay be cut into three-inch squares, with ft slit running to the centre, but for field crops it is worth while to procure a tool for cutting the paper into hexagons with a slit to a star-shaped cut at the centre. The ;c8 should be carefully fitted to the stem so ns to leave no space for the deposit of eggs by the fly, and si -Id be pressed flat upon the ground. The time and labor required for making and applying these protectors are inconsiderable, and their adoption has proved to be a great success. In the case of this and other root-infesting maggots, it is important that the same kind of plant should not be grown where an attack has occurred during the previous year, and that all refuse should be removed and destroyed after the crop has been gathered in. CABBOTS. The Black Swallow-Tail Bctterfly (Papilio asterias [polyxene8])—(J\g. 27). There may often be found feeding on the foliage of carrots and parsnips a handsome velvety green caterpillar ornamented with bands of yellow. This is the larva of one of our largest and most beautiful butterflies, black in color, ornament-. 27.—Black Swallow-tall Butterfly. ed with rows of bright yellow spots. The caterpillars do not feed in (iblonies and consequently are not often injurious, tne amount of foliage consumed by an in- dividaal seldom af
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Keywords: ., bookcentury1900, bookdecade1910, booksubj, booksubjectinsectpests
