10/23/2009
Th.S Truong Thi My Linh
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BỆNH SAU THU HOẠCH
B
B
Ệ
Ệ
NH SAU THU HO
NH SAU THU HO
Ạ
Ạ
CH
CH
CHƯƠNG 4
10/23/2009
Th.S Truong Thi My Linh
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Harvesting, transport, marketing etc.
10/23/2009
Th.S Truong Thi My Linh
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Bệnh sau thu hoạch?
Thường xuất hiện trong giai đọan giữa thu hái và

hòan thiện sản phẩm, trong quá

trình bảo quản ,
vận chuyển, tại người bán buôn, bán lẽ
Là


5
Post-harvest diseases(PDs) of fruits and vegetables
Infection timing (sự

lây nhiễm)

and methods of PDs
Attacks the actively growing plants and then develop
on the crop in storage
9 Botrytis cinerea on grapes, apples and pear
9 Sclerotinia sclerotiorum on green bean
Infects the crop at early stage but remain latent and
cause decay only when the crop ripen or when it has
been stored for some time
9 Botryosphaeria dothidea on apples and pears
9 Anthracnose fungus
Attacks the crops only after harvest
9 Penicillium spp. on apples, pears, citrus fruits, garlic etc.
10/23/2009
Th.S Truong Thi My Linh
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Post-harvest diseases(PDs) of fruits and Vegetables
Infection type (caùc daïng laây nhieãm)

of PDs
¾ T
hrough intact surface : Anthracnose fungi
¾ Through intact surface from adjoining diseased
fruits/vegetables : Botrytis cinerea
¾ Through injury : Geotrichum, Penicillium, Rhizopus,

9
Physiological injuries also predispose (dẫn đến) fruits
and vegetables to pathogens (m
ầm bệnh)
• Too low storage temperature
• Too high temperatures
• Poor ventilation( sự

thông hơi
)
• Volatile compounds( hợp chất dễ bay hơi)
10/23/2009
Th.S Truong Thi My Linh
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The forms of injuries
• Splitting of fruits or roots and tubers caused by dropping
• Internal cruising, not visible externally, caused by impact;
• Superficial grazing or scratches affecting the skins
• Crushing of leafy vegetables and other soft produce
Each injury provide entry for penetration of postharvest

pathogens
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Th.S Truong Thi My Linh
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Injuries cutting through or scraping away
the outer skin of produce
• Provide entry points for moulds and bacteria causing decay
• Increase water loss from the damage areas;
• Cause an increase in respiration rate and thus heat production

• Temperate

fruits : grapes
• Subtropical fruits : avocados, citrus fruits
• Tropical fruits : papayas, mangoes oranges
Vegetables

: cucumbers, lettuce, sweet melons
10/23/2009
Th.S Truong Thi My Linh
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Post-harvest diseases(PDs) of fruits and Vegetables
Post-harvest Diseases of Temperate fruits
Fruit Disease
Apple & Pear
Blue mold, Gray mold
Anthracnose, Target or lenticel

spot
Bitter rot, Alternaria rot
Black rot, White rot
Mucor rot, Cladosporium rot
Pleospora rot, Phomopsis rot
Pink rot, Sooty bloth
Fly speck, Brown rot
Phytophthora rot
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Postharvest diseases of boxed apples

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Heart rot(thoái trong tim)

caused by Alternaria sp/Fusarium sp.
Apple
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Black rot caused by Botryospharia dothidea
Pear
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Brown rot caused by Monilinia fructicola
Pear
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Th.S Truong Thi My Linh
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Post-harvest diseases(PDs) of fruits and Vegetables
Post-harvest Diseases of Temperate fruits (Continued)
Fruit Disease
Apricot (mô),

cherry,

nectarine,

peach,