Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . ne time as great a source oftrouble to the orange-growers ofsouthern California as the redscale {Chrysomphalus [Aspid-iohts\ aurantii) is now. It fairlycovered the citrus trees, reducedthe quantity of fruit, and destroyed its quality. Every effort was madeby artificial means to resist its attacks, but these were it was discovered that there was some natural check at work,and investigation discovered this little internal parasite. Instructionswere at once given
Appendix to the Journals of the Senate and Assembly of the ..session of the Legislature of the State of California . ne time as great a source oftrouble to the orange-growers ofsouthern California as the redscale {Chrysomphalus [Aspid-iohts\ aurantii) is now. It fairlycovered the citrus trees, reducedthe quantity of fruit, and destroyed its quality. Every effort was madeby artificial means to resist its attacks, but these were it was discovered that there was some natural check at work,and investigation discovered this little internal parasite. Instructionswere at once given to the orange-growers to stop spraying for the yellowscale and to give this little friend a chance to increase. This advicewas followed, and in a very short time the yellow scale disappearedfrom that section and it has not since been regarded as a pest, althoughno other means have been taken to check it. Mr. Craw has bred thisparasite from yellow scale upon imported trees from Japan. Mr. Mar-latt bred it in numbers from San Jose scale in Japan. It is also one ofour best checks for the same scale in Fif;. 12. Aspidiotophaguseiilartred. ritiiius, srcatly 96 REPORT OF THE COMMISSIONER OF HORTICULTURE. I EXPLANATION OF PLATE IV. Fig. 1. Scutellista cyanea, Motsch. Female; enlarged, la. Scutellista cyanea. Natural size. lb. Scutellista cyanea. Larva; natural size. 2. Scutellista cyanea. Male; enlarged. 3. Rhizohius ventralis, Blackburn. Black ladybird; Rhizohius ventralis. Natural size. 36. Rhizohius ventralis. Larva; enlarged. 4. Black Scale {Saisseta \^Leca 1111(111] olex^^exn). On orange twig. 5. Black smut; fungus, existing on exudation of black scale. 6. Black scale, shewing exit holes of Scwlellisla cyaiea. California State CommissionOF Horticulture. PLATE IV.
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