How to control the pear thrips. (Euthrips pyri Daniel) Foster, Shirley Watson. creator Jones, P. R. (Paul Robert) joint author. contributor United States. Bureau of Entomology. contributor United States. Department of Agriculture. contributor text book Washington, D.C U.S. Dept. of Agriculture, Bureau of Entomology 1911 1911
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ENG Title from caption. Circular No. 131. "Issued January 9, 1911." At head of title: United States Department of Agriculture, Bureau of Entomology. Distribution -- Economic importance. pp. 1. Character of injury -- Life history. pp. 2. Control measures -- Experiments in thrips control. pp. 6. Cultivation -- Spraying. pp. 7. Distillate-oil emulsion. pp. 8. Commercial results -- Prunes, Santa Clara County -- Demonstration for 1909. pp. 10. Results 1910 -- Plowing results. pp. 13. Demonstrations for 1910. pp. 14. Other demonstrations -- Pears, Contra Costa County. pp. 16. Cherries, Sacramento County -- Recommendations. pp. 19. Timing the applications. pp. 20. Schedule of applications. pp. 21. Materials to use. pp. 22. Summary. pp. 24. Agricultural pests Pear thrips Circular (United States. Bureau of Entomology), no. 131 https://www.biodiversitylibrary.org/bibliography/63462 811135968 10.5962/bhl.title.63462 LHL