Unfavorable conditions(temperature) during the growth cycle seems to cause choke in certain cultivars.
http://www.dpi.nsw.gov.au/__data/ass...e-response.pdf
Expert from above document. "Bananas Response to Temperature"
Choking. When the distance between the petioles (leaf stalks) of alternate leaves is reduced, the plant takes on a “choked” or “rosette” appearance. This is commonly seen during late winter to early spring. In August(remember this is New South Wales, Australia); bunches may fail to emerge properly. This is common in Dwarf Cavendish but not so common in Williams variety. Choked bunches are prone to sunburn and produce fruit difficult to pack. Choking can also be caused by high temperatures (above 30°C) and drought.
http://agritech.tnau.ac.in/agricultu...0Dr.%20P.J.pdf
Expert from above document.
BANANA Choke throat It is due to low temperature affecting active growth of the plant. Leaves become yellow and in severe cases, the tissue gets killed. In case of normally flowering plants, the stalk carrying bunches elongates freely so that the entire inflorescence comes out of the pseudostem and hangs down. Bunch development is normal, but when the time of flowering synchronizes with low temperature, the bunch is unable to emerge from the pseudostem properly. The distal part of the inflorescence comes out and the basal part gets stuck up at the throat. Hence, it is called Choke throat. Maturity of the bunch is delayed by taking 5-6 months instead of 3.5-4 months for harvest. Provision of shelter belts using Casuarina or Eucalyptus to prevent the effect of cold wind blowing into the orchard and planting low temperature tolerant varieties like Kullan check the disorder.
TNAU Agritech Portal :: Bio Technology
Climate
Banana a humid tropical plant, comes up well in regions with a temperature range of 10°C to 40°C. Low temperatures(less than 10°C) are unsuitable since they lead to a condition called “Choke” or impended inflorescence and bunch development. Wind velocity more than 80km causing harms to plantations.
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Growin’ a bunch
Orinoco
"Ice Cream" Namwah
Williams hybrid
FHIA 17
Dwarf NamWah