POKKAH BOENG DISEASE:
Casual Organisms= Fusarium Sacchari
Symptoms=
They are three types of symptoms=
Chlorotic Phase:
· Earliest symptoms of pokkahboeng is a chlorotic towards the base of young leaves and occasionally on the other part of leaf bladis.
Top Rot Phase:
· The most advanced and serious stage.
· Young spindle are killed and downward and penetrates in the stalk by way of a growing point.
Knife-Cut Phase:
· These symptoms are associate with top rot phase characterized with by 1 or2 or even more transverse cut in the wind of the stalk.
Disease Cycle=
Perennation=
· Through soil, crop and collateral host as and chlamydospore
Primary infection=
· Through conidia present in leaf and soil host.
Secondary infection=
· Through wind, infected setts, irrigation water and rains.
Favourable condition=
· P.H.= 6.5-7.5
· Temperature=
a) Minimum temperature :10-15 degree.
b) Optimum temperature :30 degree.
c) Maximum temperature: 35-40 degree.
· Humidity= 70-80%
Management=
CULTURAL METHOD
· Proper sanitation application applies in the field. E.g.: soil solarization.
· Proper spacing maintain row to row and plant to plant.
· Remove infarcted part of the plant.
· Apply good weed management practices.
· Apply good irrigation application in the filed area.
· Grow resistant varieties.
· Canes showing ‘top rot’ or ‘knife cut’ should be rogued out.
Chemical method
Use some effective fungicides to control the disease in field area. they are following.
· Spraying of 0.1%bavistin (1gm/L of water).
· 0.2% blitox-50(2gm/L of water).
· Copper oxychloride 0.3%Dithane M-45 (3gm/L of water).
