. The standard cyclopedia of modern agriculture and rural economy, by the most distinguished authorities and specialists under the editorship of Professor R. Patrick Wright ... f parasiticHymenoptera called Proctotrupids, which de-velop in a dark sac-like process projecting fromthe body of the Leaf-hopper. These parasitesdestroy the reproductive faculties of the insects. Treatment consists of spraying with diluteparaffin emulsion to kill the larvae and adults can only be destroyed by spraying with soft soap and water, which causes them tofall to the ground, when they are further spr
. The standard cyclopedia of modern agriculture and rural economy, by the most distinguished authorities and specialists under the editorship of Professor R. Patrick Wright ... f parasiticHymenoptera called Proctotrupids, which de-velop in a dark sac-like process projecting fromthe body of the Leaf-hopper. These parasitesdestroy the reproductive faculties of the insects. Treatment consists of spraying with diluteparaffin emulsion to kill the larvae and adults can only be destroyed by spraying with soft soap and water, which causes them tofall to the ground, when they are further sprayedwith a strong emulsion of paraffin. They mayalso be collected by jarring them off the treeson to tarred boards. [f. v. t.] Chlorita solani (Potato Frogily) aboundsupon the leaves of the potato in August andSeptember, either sneaking round to the oppo-site side of a stalk when disturbed, or makingshort, skipping flights. The eggs (figs. 1 and 2,natural size and magnified) are white, ribbed,and laid on the under side of the leaves, wherethe young ones live by sucking the sap withtheir long sharp beaks. These are green, andas they increase in size they cast their white. Potato Frogfly (Chlorita solani) skins and become pupae (figs. 3 and 4), whenthey have two long, very fine antennae, two largedark eyes, also sheaths for their wings, and sixlegs. From these they pass into the perfectstate, when they are of a lively green colour,and attain four ample wings, which lie over theback when at rest (figs. 5 and 6); the hind legsare long and spiny. They cause the yellowspotting of the potato leaves so frequently seenin dry weather. [j. c] [f. v. T.] Chlorite, a name for a group of mineralswhich resemble dark-green micas, but which aresofter, and not elastic even in thin flakes. Thechlorites are hydrous silicates of aluminium,magnesium, and iron, and some contain as muchas 13 per cent of water. The thumbnail scratchesthem easily. The common aluminous silicatesof magnesium and iron, suc
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagriculture, bookyear
