. Annals of applied biology. Biology, Economic; Biochemistry. Kenneth M. Smith 43 the injury did not spread and the leaves were not put back in their development. If it is assumed that the injury is due to the mechanical laceration of the cells and their consequent loss of sap by the stylets of the bug, then the question arises, why do not the other species of apple feeding bugs produce the same effect? as the methods of feeding, and the man- dibles and maxillary stylets are precisely the same in each Fig. 2. Semi-diagrammatic drawing of the head of Lygus pabulinua showing mouth parts.
. Annals of applied biology. Biology, Economic; Biochemistry. Kenneth M. Smith 43 the injury did not spread and the leaves were not put back in their development. If it is assumed that the injury is due to the mechanical laceration of the cells and their consequent loss of sap by the stylets of the bug, then the question arises, why do not the other species of apple feeding bugs produce the same effect? as the methods of feeding, and the man- dibles and maxillary stylets are precisely the same in each Fig. 2. Semi-diagrammatic drawing of the head of Lygus pabulinua showing mouth parts. Attempts were made under the binocular microscope to pierce the leaf with the mouth-parts of various species after they had been removed from the head so that there was no possibility of any salivary juices being injected: this was not very satisfactory owing to the extreme fineness of the stylets, but in a few instances perforation was effected but with no visible results, the stylets apparently being too minute to kill more than one or two cells by laceration. As regards the possibility of the loss of sap by sucking causing the damage, if this were so it would of necessity follow that all the species of Capsids and indeed any sucking insect should produce similar harmful 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 Association of Applied Biologists; Association of Economic Biologists. [Wellesbourne, Warwick, etc. ] Association of Applied Biologists [etc. ]
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