How do you control a bunchy top virus?
How do you control a bunchy top virus?
Control of banana bunchy top is achieved by killing the banana aphids then destroying all infected material. First, the aphids should be killed on the infected banana material, and then all the plant material should be destroyed to prevent the spread of the virus.
What does banana bunchy top virus do?
Banana bunchy top is a serious viral disease of bananas. Affected plants rarely produce fruit, which results in significant production losses and once plants have become infected there is no cure. Backyard plantings of banana are common in Queensland and can be significantly affected by the disease.
What acts as vector for bunchy top of banana?
The disease is caused by Banana bunchy top virus (BBTV), which is transmitted by banana aphids (Pentalonia nigronervosa Coquerel).
Which disease in banana is caused by virus?
Banana bunchy top disease caused by Banana bunchy top virus (BBTV) is the most serious virus disease in banana-growing regions worldwide. BBTV is the type member of the Babuvirus genus.
How do you treat banana aphids?
Control of the banana aphid is essential for long term management of banana bunchy top disease. Aphids can be killed by their natural enemies, or with sprays of registered insecticides, or with insecticidal soaps or liquid dish washing detergents and vegetable oils (see below).
How many steps is disease cycle?
The five periods of disease (sometimes referred to as stages or phases) include the incubation, prodromal, illness, decline, and convalescence periods (Figure 2). The incubation period occurs in an acute disease after the initial entry of the pathogen into the host (patient).
How do banana plants respond to Bbtv?
As BBTV progresses dark green streaks appear on the infected leaves, midribs and stalks. In older banana plants dark green streaks may be seen on flower bracts. Banana plants which are mature when infected with BBTV may produce fruit but the bunches will be stunted and deformed.
What is the shape of TMV capsid?
Due to its cylindrical shape, high aspect ratio, self-assembling nature, and ability to incorporate metal coatings (nickel and cobalt) into its shell, TMV is an ideal candidate to be incorporated into battery electrodes.
Which of the following is a cause of bunchy top disease of papaya?
Although bunchy top was originally thought to be caused by a virus, the disease is most likely caused by a mycoplasma-like organism (MLO).
How do bananas control CMV virus?
In the majority of situations effective control of CMV can be achieved by weed control to eliminate adventitious plant species which serve as reservoirs for both virus and aphid vectors, It should be noted however that while other species are primary source of virus for infection of bananas, banana itself can serve to …
How do you control banana disease?
Use of disease-free planting material and resistant cultivar are recommended. Growing of paddy followed by banana for 3-5 years once or twice, use of quick lime near the base of the plant and soaking with water and avoiding sunflower or sugarcane in crop rotation helps to reduce the disease incidence.
How can banana pests and diseases be controlled?
Application of Carbofuran (3 g of granules/stool) is very effective to control the pest. Alternately, application of Endosulphan (0.04%) or Carbaryl WP (0.1%) also controls the pest population. The larvae or grub of the weevil borer feeds by tunnelling in the banana plant.
What is banana bunchy top virus (BBTV)?
Banana bunchy top virus (BBTV) is the most devastating virus disease of bananas. It is present across all of south Asia and the Pacific and is currently spreading in Southern Africa. The disease is causing severe damage in Malawi and DR Congo while it has only recently been recorded in Angola, Mozambique, and Zambia.
What is bunchy top disease in bananas?
Bunchy top is a viral disease caused by the Banana bunchy top virus (BBTV). The disease, often called BBTD for banana bunchy top disease, gets its name from the bunchy appearance of infected plants. By that time, however, the virus has most likely been spread to other plants by the banana aphid, Pentalonia nigronervosa.
How is bunchy top disease (BBTV) transmitted?
Although unequivocal evidence by reproduction of the disease through inoculation of purified virions or cloned genomic components is lacking, definitive association of BBTV with bunchy top disease was demonstrated by insect vector-mediated transmission of BBTV from an infected banana to a healthy banana plant.
What is bbbbtv disease of bananas?
BBTV is the most serious virus disease of bananas and plantains. It occurs in Africa, Asia, Australia and South Pacific islands. The virus is transmitted in a persistent, circulative, non-propagative manner by the banana aphid, Pentalonia nigronervosa, which has worldwide distribution.
