Greetings from Dhaka! we have found a problem of papaya seedlings grown in a Papaya field. The problem found that repeatedly seedlings were die due to this disorder. the problem was observed after 5 days of germination. the first two leaves became burned. They started die from the leaf tips and spread towards inside and lastly the whole shoot tip died.
Soil type: acidic and reddish before preparing the seed bed.
Weather: winter (10-15C)
The manuring and the seed sowing were as follows:
Manuring before seed sowing in the seed bed:
micronutrinet: (at low dose)
zinc sulphate monohydrate
root hormone (PCPA, NAA)
seeds coated with zinc sulphate monohydrate, solobor boron, sodium molybdate with cowdung and betavex (fungicide) before sowing.
after seed germination:
DAP and MOP was added to the seed bed along with cowdung on the soil top.
Fungicide spray: Ridomil ( metalaxyl + mancozeb)
Insecticide: Imidaclopid (Chloronicotinyle) and Cypermethrine; after germination
The pictures of the disorder seedlings in the seedbed are attached here. The situation is very sever here. We need help from the expert to identify and troubleshoot the problem.
F.M. Safiul Azam
University of Development Alternative