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4. Apple scab (id:ORC00000432)

8. Why potatoes run out (id:ORC00000499)

9. Control of potato-tuber diseases (id:ORC00000442)

12. Diseases of watermelons (id:ORC00000479)

15. The chinch bug and its control (id:ORC00000309)

18. Cotton diseases and their control (id:ORC00000292)