Which among the following is effective to control bacterial blight of cotton?

Correct option is C

✅ Correct option: (c) Copper oxychloride
· Copper compounds are effective bactericides used against bacterial blight of cotton ( Xanthomonas campestris pv. malvacearum).
❌ Other options:
· (a) Metalaxyl – Fungicide effective against oomycetes, not bacteria.
· (b) Vitavax – Fungicide (carboxin).
· (d) Plantvax – Fungicide, not bactericide.