Agriculture Reference
In-Depth Information
Fig 12.47 Symptoms of sudden death in trunk and roots showing
a healthy root (left) and an infected root (centre).
Fig 12.46 Gummosis is a symptom of sudden death. Inset: detail
of symptoms.
Fig 12.48 Cut root sections on a felled tree. Inset: radial pattern
on the section of a root lesion.
bark is removed. Tree death may be sudden following
these symptoms.
Importance
Sudden death occurs in several countries, including
Brazil, some Gulf States and Pakistan, causing extensive
losses of plantation trees. All mango plants introduced
into Australia must be grown and tested in post-entry
quarantine.
Source of infection and spread
Trees that are under stress appear to be most at risk. The
exact mechanisms of spread from one orchard to another or
within orchards are not fully understood. In countries
where the disease is present, different cultural practices in
orchards (e.g. f flood irrigation, cultivation close to trees) can
encourage its spread. It is also suspected that the disease is
introduced into new orchards through diseased seedlings.
Bark beetles are believed to play a role in disease spread,
both as vectors and as wounding agents for infection.
What to do if you suspect sudden death
This pathogen is a biosecurity risk to Australia. Any
suspected affected plants should be reported to the
nearest Department of Primary Industries or the Plant
Health Australia hotline (1800 084 881).
FURTHER INFORMATION
L i t z R E ( E d . ) ( 1 9 9 7 )
Mango-botany, production and uses
. CABI
Publishing: Wallingford.
■
B a g s h a w J ( E d . ) ( 1 9 8 9 )
Mango pests and disorders
. Department of
Primary Industries: Brisbane.
P l of e t z R C ( 2 0 0 3 ) D i s e a s e s of f m a n g of . I n
Diseases of tropical fruit
crops.
(Ed. RC Ploetz) pp. 327 - 364. CABI Publishing:
Wa l ling ford.
L i m T TK ( 1 9 8 5 )
Diseases and disorders of mango in Malaysia.
T r of p i c a l
Press: Kuala Lumpur.
