. The insect and other allied pests of orchard, bush and hothouse fruits and their prevention and treatment . Insect pests; Fruit. 248 Insect Pests. small twiss and buds. In tliis positimi they remain until the buds of the damson burst in spring. The earliest date I have noticed them hatch out is the 29tli of March. That is later than the hatching of the true plum apiiis. Not only are these ova laid on the damsons and now and then plums, but also in numbers on the sloe ; in fact, the damson and sloe are most affected. During the autumn vast swarms of tlie hop aphis cover the leaves of all prun
. The insect and other allied pests of orchard, bush and hothouse fruits and their prevention and treatment . Insect pests; Fruit. 248 Insect Pests. small twiss and buds. In tliis positimi they remain until the buds of the damson burst in spring. The earliest date I have noticed them hatch out is the 29tli of March. That is later than the hatching of the true plum apiiis. Not only are these ova laid on the damsons and now and then plums, but also in numbers on the sloe ; in fact, the damson and sloe are most affected. During the autumn vast swarms of tlie hop aphis cover the leaves of all prunes, yet but very few eggs are detected on plum trees and greengage, whilst the damsons are literall>" covered. If damsons and sloes exist in the neighbourhood they are used as winter egg quarters in preference to any other prunes. The planting of damsons without any necessary checks has been a means of increase for the hop aphis. (Jn these trees the ova hatch out in into. lice, which speedily grow into wmgless and \-i\-iparous : these are sometimes spoken of as "(lueen-" or "; These wingless females produce Ining young like tliemselves, and suck out the sap of the young damson leaves, often rausinu untold damage, and the lilossom may sutler. Thev can at ouce"^ be cold from the I'lum Aphis (J. pnnii), by tlie snurll processes on the head shown in the figures. Some authorities have considered ihis prune-hop aphis a distinct variety, known as varietv nnn,,]nl: there IS no reason for giving it another name, it .is die same aiihis although the anteunal swellings are not so developed on the ,lams,,n as when it is on the hop,s. On the there seem I,, l,e nornnllv. 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 Theobald, Frederick Vincent, 1868-1
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectpests, bookyear
