The rose bushes in your garden have flat brown spots on thei…
The rose bushes in your garden have flat brown spots on their leaves that you suspect are due to an infection by Rosilla freckulus. Based on your knowledge of Koch’s postulates, what is the correct order of steps to be performed to prove that these bacteria are responsible for this plant disease. 1. Grow Rosilla freckulus in pure culture 2. Isolate Rosilla freckulus from all the diseased bushes 3. Reisolate Rosilla freckulus in pure culture 4. Reproduce the disease in the new hosts5. Inoculate undiseased rose bushes with Rosilla freckulus
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