Sanshodhanen Savruddhi

Pineapple Disease
Plant Pathology Section (Agriculture Division)

Pineapple Disease on Sugarcane
 
Pinapple Disease

Causal organism: Ceratocystis paradoxa.


Symptomatology
Pineapple disease primarily affects sugarcane setts in the first weeks of planting. The fungus infects the setts mainly through the cut ends and from there spreads rapidly through the parenchyma. Infected tissue first becomes reddened; the parenchyma then breaks down and the interior of the setts become hollow and blackened. In the early stages of the rotting, the strong odour of overripe pineapples is often present and may help in diagnosing the disease.
Pineapple Disease in Sugarcane
Setts affected by pineapple disease may decay before buds germinates or young shoots may die back shortly after emergence.
The development of the sett roots on infected setts may be sparse. If shoot roots develop before extensive rotting occurs, the shoots from the infected setts may survive but the growth of the shoots may be retarded.
Pineapple disease can result in crops having a patchy, uneven appearance. When severe, the disease may seriously reduce the germination over large areas.
Pineapple disease may occur in stalks of the standing cane if the stalks are mechanically or physically damaged, such as by boring insects or rats.

Transmission
Pineapple Disease infected Sugarcane Field
Soil by Micro conidia present in the soil. Infection of the standing canes stalks occurs occasionally through blown wind or rain splashed spores gaining entry through damaged tissues due to mechanical and animal injuries.
Control
Adopting one or more of the following measures can minimize the disease incidence.
Use of long setts and good field hygiene.
Use of resistant varieties.
Treatment of sets with fungi-toxicants before planting. (0.1% Bavistin or 0.1% Bayleton – 100gm. of fungicide in 100 Lit. of water, sett dipping for 10 to 15 minutes)