Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . [ hatched Larva ; a,ventral; b, dorsal view.]. [MoTHEB Gall-Louse; ventral and dorsal views.] By the end of September the galls aremostly deserted, and those which are leftare usually infected with mildew, and even-tually turn brown and decay. The younglice attach themselves to the roots, and thushybernate. It is an important fact that thegall-inhabiting insect occurs only as anagamic and apterous female form. It is buta transient Summer state, not at all essentialto the p
Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . [ hatched Larva ; a,ventral; b, dorsal view.]. [MoTHEB Gall-Louse; ventral and dorsal views.] By the end of September the galls aremostly deserted, and those which are leftare usually infected with mildew, and even-tually turn brown and decay. The younglice attach themselves to the roots, and thushybernate. It is an important fact that thegall-inhabiting insect occurs only as anagamic and apterous female form. It is buta transient Summer state, not at all essentialto the perpetuation of the species, and does,compared with the other, or root-inhabiting type, but trifling dam-age. It flourishes only on the Riparia, more especially on the Clin-ton and Taylor; a few ofits galls have been noticedon some other varieties,and abortive attempts areoften made to found themon others. And in someseasons it is even difficultto find a few galls on thevery vines on which theywere very abundant theyear before. The root-inhabiting type of the grape phylloxera hybernates mostlyas a young larva, attached to the roots, and so deepened in color asgene
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Keywords: ., bookcentury1800, bookdecade1850, bookidappendixtojo, bookyear1853
