. Annals of applied biology. Biology, Economic; Biochemistry. Ll. Lloyd 13 also bear spine bosses, and in one case there is an asymmetrical one on the fifth segment. Where these additional ones are not developed, minute hairs can be seen replacing them, evidently vestiges. This instar becomes quite opaque early in its development and it is therefore not possible to tell by the movements of the pharyngeal pump how long it continues to feed. After the eyes and other organs are well developed, if it is removed from the leaf its mouth stylets wave to and fro as though they were still functional. C
. Annals of applied biology. Biology, Economic; Biochemistry. Ll. Lloyd 13 also bear spine bosses, and in one case there is an asymmetrical one on the fifth segment. Where these additional ones are not developed, minute hairs can be seen replacing them, evidently vestiges. This instar becomes quite opaque early in its development and it is therefore not possible to tell by the movements of the pharyngeal pump how long it continues to feed. After the eyes and other organs are well developed, if it is removed from the leaf its mouth stylets wave to and fro as though they were still functional. Considerable growth in depth also takes place after the adult eyes are distinct. If it is removed from. Fig. 4. Mature scale (pupa) of A. vaporariorum. ( x 130). 1. adult eye, 2. thoracic breathing fold, 3. caudal breathing fold, 4. vasiforra orifice. the leaf shortly before emergence the mouth stylets break ofE short by the case and have evidently ceased to function except as an anchor. About this time a copious excretion of honey dew takes place and the insect then lies tolerably free inside the old larval skin. The duration of the scale stage was noted on a variety of plants which were examined before use to ascertain that they were free from the pest. They were then heavily infested with the fly for one or two days. After this the fly was cleared from them and they were enclosed in muslin sleeves. The hatching of the eggs and the emergence of the adults were. 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. ]
Size: 1777px × 1406px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectbiochem, bookyear1922
