Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . The Root Louse. Fig. 4—Young larva. Fig. 5—Adult (egg-lajing) larvw. Fig. 6—Male Insect Fig. 7—Vine root, with colonies of eggs and insects on main root; sound rootlet; rootlets with swellings; deadrootlets; black. The newly hatched larvse of either are alike. Those of the RootLouse soon acquire tubercles over their surface ; these, however, areirregular, only skin deep, and sometimes absent. As the develop-ment progresses, two forms begin to differentiate themselves. Oneis of a
Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . The Root Louse. Fig. 4—Young larva. Fig. 5—Adult (egg-lajing) larvw. Fig. 6—Male Insect Fig. 7—Vine root, with colonies of eggs and insects on main root; sound rootlet; rootlets with swellings; deadrootlets; black. The newly hatched larvse of either are alike. Those of the RootLouse soon acquire tubercles over their surface ; these, however, areirregular, only skin deep, and sometimes absent. As the develop-ment progresses, two forms begin to differentiate themselves. Oneis of a somewhat pointed egg or pear-shape, and resembles the wing-less Gall Louse; the other is of an oval form. The former is the mother Root Louse; it remains on the rootthrough life, sucking its juices, locating itself and its colonies bypreference in crevices, creases, etc. At maturity, without sexualimpregnation, each lays upwards of two hundred and fifty eggs,which on hatching again rapidly go through the same round of life. THE WINGED FORM. The oval form of the Root Louse larva is destined to becomewin
Size: 1138px × 2195px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, bookidappendixtojo, bookyear1853
