Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . he yellow mite (Fig. 26), holdsfull sway and can only be kept in checkby the application of dry sulphur or bya sulphide of potash spray. Orange Mites (Tetranychus mytilaspi-dis and T. sexmaculatus). (Fig. 25.)These species have been reported fromseveral sections as doing considerabledamage to young citrus trees. In somesections they can always be found inlimited quantities only, especially wherefumigation or spraying is generallypracticed, but they become a very seri-ous pest if
Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . he yellow mite (Fig. 26), holdsfull sway and can only be kept in checkby the application of dry sulphur or bya sulphide of potash spray. Orange Mites (Tetranychus mytilaspi-dis and T. sexmaculatus). (Fig. 25.)These species have been reported fromseveral sections as doing considerabledamage to young citrus trees. In somesections they can always be found inlimited quantities only, especially wherefumigation or spraying is generallypracticed, but they become a very seri-ous pest if not subdued in time by eitherof the above methods. The presence ofthese mites may be easily detected by anexamination of the leaves, which have adrooping appearance. The young spiders wander all over the surface ofthe leaves, feeding in different places by puncturing them. These punc-tures give the leaves a mottled appearance when examined through alens. It is this terrible sapping of the leaf which causes it to have thatunthrifty look, and naturally is the result of the sap being taken bythese minute Fig. 25. Six-Spotted Mite (Tetranychusmaculata). a. Insect, much enlarged, h. Rostrum and palpus, still more en-larged, d. Tip of palpus, still more en-larged. 122 REPORT OF THE COMMISSIONER OF HORTICULTURE. Pear-leaf Blister Mite {Phytoptus pyri). (Fig. 27.) This mite differsvery much in structure and habits from all common mites, it beingcylindrical in form and living in the tissue of the leaves. Early spray-
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