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| University of Ohio. | Two-spotted spider mite. | http:/ / ohioline.osu.edu/ icm-fact/ fc-24.html |
| USDA. | Grasshoppers: Their biology, identification and management. USDA-ARS. | http:/ / www.sidney.ars.usda.gov/ grasshopper/ Research/ guides.htm |
| Wisconsin Entomology. | Insect predators of potato leafhopper. | http:/ / www.entomology.wisc.edu/ mbcn/ field607.html |
| Wynboer. | Mealybug: Biology and control strategies. | http:/ / www.wynboer.co.za/ recentarticles/ 0301mealybug.php3 |
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