. Manual of fruit insects. Fig. 276. — Mines in a blackberry leaf. HWp mv II^Hf^* f}. ^^P wl^Km RASPBERRY, BLACKBERRY AND DEWBERRY INSECTS 319 York the second brood is probably only partial. The winteris passed in the larval or pupal condition in the ground. A satisfactorymethod of control-ling this insect hasnot been worked out,but it would be worthwhile to try to killthe larvae in theirburrows by sprayingwith Black Leaf40 tobacco extract, 1 pint in 100 gallons ^^- 277. - Egg-blisters of the blackberry leaf-*^ ^ miner, one opened to show the egg (x6). of water, to which a little soap has been
. Manual of fruit insects. Fig. 276. — Mines in a blackberry leaf. HWp mv II^Hf^* f}. ^^P wl^Km RASPBERRY, BLACKBERRY AND DEWBERRY INSECTS 319 York the second brood is probably only partial. The winteris passed in the larval or pupal condition in the ground. A satisfactorymethod of control-ling this insect hasnot been worked out,but it would be worthwhile to try to killthe larvae in theirburrows by sprayingwith Black Leaf40 tobacco extract, 1 pint in 100 gallons ^^- 277. - Egg-blisters of the blackberry leaf-*^ ^ miner, one opened to show the egg (x6). of water, to which a little soap has been added, 2 pounds in 50 gallons. Thismixture has been found of value against a similar larva miningthe leaves of the European elm. RefkrenceDel. Agr. Exp. Sta. Bull. 87, pp. 10-15. 1910. The Raspberry SawflyMonophadnus ruhi Harris In the Northern states and Canada from Iowa eastward thelarva of this sawfly often causes serious injury to the raspberryand also attacks the blackberry and dewberry to a slight adult
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