. Insects and plant diseases [microform] : instructions in spraying. Spraying and dusting in agriculture; Agricultural pests; Pulvérisation et poudrage en agriculture; Ennemis des cultures, Lutte contre les. 12 Remedies.—I. Examine the trees in autumn, and where the sawdust-like oastings indicate the presence of the " borer," a stifl wire may be pushed in and the larva killed, or sometimes the larva can be out out with a knife. 2. About the beginning of June, apply the following mixture to the trunk of the tree ; one pound of hard soap, or one quart soft in two gallons of water ; hea
. Insects and plant diseases [microform] : instructions in spraying. Spraying and dusting in agriculture; Agricultural pests; Pulvérisation et poudrage en agriculture; Ennemis des cultures, Lutte contre les. 12 Remedies.—I. Examine the trees in autumn, and where the sawdust-like oastings indicate the presence of the " borer," a stifl wire may be pushed in and the larva killed, or sometimes the larva can be out out with a knife. 2. About the beginning of June, apply the following mixture to the trunk of the tree ; one pound of hard soap, or one quart soft in two gallons of water ; heat to boiling, and add one pint crude carbolic acid; make a second applica- tion in three weeks. This can be well done by using an old scrubbing brush to rub it in. 13, The Pbab Trbk Psylla —Psylla pyricola. The immature tn««c<—These curious, minute, oval, immature forms are called nymphs. The newly-hatched ones are yellow in color, with crimson eyes and can scarcely be seen with the unaided eye. Duting their growth they gradually acquire the black markings shown in the figure, and beoonae tinged with red. A very conspicuous feature in the full grown nymph is the large black wing- pads on each side of the body. The adult insect.—In this form the insect strikingly resembles a cicada or dog-day harvest- Hy in miniature. Its general color is orimson with broad black bands across the abdomen. Its thickened femora enable it to jump like a ilea. In the male insect the abdomen terminates in a large trough-shaped segment from which pro- ject upward three narrow copulating organs; Full-grown nmph'of the pear pniiJa, the end of the abdomen of the female resembles ventral view, greatly enlarged. a bird's beak. Remsdy.—0\xT experiments in 1892 showed that the nymphs in all stages were quickly killed by kerosene emulsion.* Others who have tested it thor- oughly report success. Usually most of the damage is done in this State by the first brood of nymphs before June 15bh. It i
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