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Arecanut saplings about 2 year old, have brown round patches, hole through the middle, starting mainly on bottom leaves. what is this? and remedy ?- Vyas Chiplunkar
This is leaf spot disease. As you mentioned it occurs in older leaves of plants in nursery stage to 10 year old trees. If it is very severe, it may cause drooping of plants, death of tissues in leaves. Removal of old leaves has to be done. Spraying copper oxychloride at the rate of 0.3% or Dithane M-45 at the rate of 0.3% or Bordeaux mixture at 0.1% is found effective
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