. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. DISEASES OF CROPS. in the leaves and stems of grasses. The pnpae of this insect are of an ochre colour. Chlorops has several foes belonging to the Insecta / the most important of which are Pteromalus micans and Ccelinius nigerâtwo flies which lay eggs within the bodies of the maggots of Chlorops tmniopus. The larvae produced from these eggs feed and live upon the maggots of Chlorops, reducing them to mere empty skins. It has been estimated that this fly caused a loss of from 3
. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. DISEASES OF CROPS. in the leaves and stems of grasses. The pnpae of this insect are of an ochre colour. Chlorops has several foes belonging to the Insecta / the most important of which are Pteromalus micans and Ccelinius nigerâtwo flies which lay eggs within the bodies of the maggots of Chlorops tmniopus. The larvae produced from these eggs feed and live upon the maggots of Chlorops, reducing them to mere empty skins. It has been estimated that this fly caused a loss of from 3 to 14 bushels of corn per acre ("Whitehead's "Reports ")â. Fig. 33.âThe Coen Saw-Fly {Cephus pygmtsus). A. The fly (nat size). B. Larva (nat. size). C. Infested stem (enlarged). Prevention.â(1) Grasses, etc., infested with Chlorops should be eaten by sheep. (2) After thrashing infested barley or wheat, the chaff, etc., should be burnt. (3) Pulling up all stunted and infested plants has a tendency to greatly reduce the attacks of this pest. (4) Promote healthy and vigorous growth by the judicious use of soluble manures ; for barley is a " shallow feeder " {, it obtains nourishment from the surface soil), and requires easily assimilable plant-foods. The Corn Saw-Fly {Cephus pygmmus, Fig. 38) belongs to the Hymenoptera, and attacks fearley and other. 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 Griffiths, A. B. (Arthur Bower), 1859-. London : G. Bell
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Keywords: ., bookauthorgriffith, bookcentury1800, bookdecade1890, bookyear1890
