Correct understanding of banana bundle top disease
Banana bunchy top disease, also known as banana banana
disease, bush top disease, scallion banana or shrimp banana, mainly damages
bananas and sometimes plantains. It occurs in Guangxi, Guangdong, Hainan,
Fujian and Yunnan. The incidence of banana gardens with severe incidence can
reach 10% -30%, or even 50% -80%, but most banana gardens occur sporadically.
Plants that are susceptible to disease early are dwarfed and do not bud. Plants
that are susceptible only at the current bud stage have fewer fruits and no
commercial value.
The most prominent symptom of banana bunchy top disease is
that the newly grown leaves are shorter and narrower than one, so that the
diseased plant is short, the leaves are hard and straight, and they grow
together in bundles.
The veins, petioles and false stems of the diseased leaves
showed thick green streaks of intermittent and varying lengths.
Banana farmers
call the thick green stripes on the petioles and fake stems "green
bars". These dark green stripes are a reliable feature to diagnose early
diseased plants.
Bundle top disease is a viral disease that mainly spreads
among aphid strains in banana gardens, while the long-range spread mainly
depends on diseased seedlings. The host range of the virus is limited to sweet
bananas and abaca. Therefore, the disease is mainly prevention, and specific
prevention methods are:
1. Strictly choose disease-free banana seedlings
New planting banana gardens must strictly choose reliable and
disease-free seedlings. It is best to choose healthy and disease-free test tube
seedlings. As planting materials, bud-buying seedlings often cannot guarantee
their quality, and the incidence rate after planting is often higher than test
tube seedlings.
2. Kill aphids regularly
After planting, it should be sprayed regularly with 40%
oxymetholone 800-1000 times, 50% aphid mist 1500-2000 times, or other
insecticides to control aphids to cut off the transmission route. The seedlings
are sprayed once every 10-15 days, and the adult plants are sprayed once a
month.
3. Strengthen soil, fertilizer and water management
Improving the management conditions of soil, fertilizer and
water in banana gardens to make banana plants grow vigorously and enhance
disease resistance is an active measure to control the occurrence of this
disease or reduce its incidence.
4. Dig out diseased plants
After planting, they must be inspected regularly, at least
once a month. Once the diseased plant is found, it must be excavated. Before
digging out diseased plants, spray insecticide to kill aphids, or kill the
diseased plants with herbicide and then dig out. For example, Yunnan Academy of
Agricultural Sciences used 105 glyphosate 10 ml to inject fake stems 10 cm
above the ground, and basically rotted in 30 days. The excised diseased plants
are burned down or buried in deep manure.
5. Replanting other crops
For hospitals with an incidence rate of 30% -50% or more, due
to the high probability of infection, a large number of healthy plants will
also become ill after the diseased plants are removed. In this case, other
crops should be replanted, or rice, sugarcane, etc. should be rotated to reduce
the source of this disease and the source of diseases and insects.
Author's Bio
 |
| Dr. Shawna Reason |
Education: MBBS, MD
Occupation: Medical Doctor / Virologist
Specialization: Medical Science, Micro Biology / Virology, Natural Treatment
Experience: 15 Years as a Medical Practitioner
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