Insects injurious to fruits . s of the mealy-bug; they arecovered with a white secretion, something like the mealy-bugitself, and hence are not easily discovered. Hyperaspidlus coccldivora Ash mead. This beetle, whiciiresembles a minute Scymnus, also destroys many of thescale-insects, and is especially destructive to the chaff is about one twenty-fifth of an inch long, oval, of adark color, having a polished surface and a reddish patchon each 437. The orange Chrysopa, Chrysopa citri Ashinead. This is a lace-wingfly, of a bright yellowish-green color,with antennae longe
Insects injurious to fruits . s of the mealy-bug; they arecovered with a white secretion, something like the mealy-bugitself, and hence are not easily discovered. Hyperaspidlus coccldivora Ash mead. This beetle, whiciiresembles a minute Scymnus, also destroys many of thescale-insects, and is especially destructive to the chaff is about one twenty-fifth of an inch long, oval, of adark color, having a polished surface and a reddish patchon each 437. The orange Chrysopa, Chrysopa citri Ashinead. This is a lace-wingfly, of a bright yellowish-green color,with antennae longer than the trans-parent, netted wings, and havingbright, golden eyes. (See Fig. 437.)Its eggs are laid on long, thread-likestalks, and the larva, which devours both scale-lice and plant-lice greedily, covers itself with minute pieces of dried leavesor other light substances. It is pinkish, mottled with brown SJXitS. Artificial Remedies.—From the suctorial habits of thebark-lice, the remedies available are limited to such as. INSECTS INJURIOUS TO THE OR A NO E. 419 destroy life by contact, or produce death when inhaledthrough the breathing-pores; for since these insects drawtheir food from beneath the surface of the tissues, the appli-cation of any poison which requires to be eaten with the foodto produce its eifects is not likely to be of much service. Scale-insects on the bark of the trunk or limbs of treesmay be removed mechanically by using a stiif brush, eitherwith or without the use of an insecticide. Those on thesmaller twigs and leaves can only be reached by sprayingsome suitable liquid on the trees. Alkaline washes seem tohave successfully stood the test of practical experiment, andare used with good results by many of the leading fruit-growers on the Pacific coast and in Florida. A solution of concentrated lye or commercial potash, or itsequivalent in lye made directly from wood-ashes, appears tobe equally effective. One bushel of good wood-ashes will produce about f
Size: 1951px × 1281px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsaunderswilliam183619, bookcentury1800, bookdecade1880
