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Chemical control of fruit fly


20137804400.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Chemical control of fruit fly
Recognize the problem
The fruit fly causes fruit drop and rot.
Background
The fruit fly perforates the fruit to lay its eggs. The worms that are born from
the eggs eat the pulp and damage the fruits.
Damaged fruits fall onto the soil, where the offspring of the fruit fly soon
develop into adults, which can then reproduce.
If one same...

plantwise.org

Damage by sugar cane borer in maize


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FACTSHEETS FOR FARMERS www.plantwise.org Created in Bolivia , July 2012 Damage by sugar cane borer in maize Recognize the problem This worm bores the maize stalk. If the maize is young, this worm can kill the plant. If the attack occurs after ear formation, the plants fall and cannot be lifted by the harvester. However, the infestation level is usually low. Background The borer is the same pest that has always affected sugarcane but it is...

plantwise.org

Powdery mildew in nursery


20137804403.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Powdery mildew in nursery
Recognize the problem
At the beginning, there are small white spots similar to ash. After a while, the
leaf becomes totally covered with this mildew. Soon, the leaf becomes black
and the seedlings die.
Background
Powdery mildew is a fungus that lives on leaf surface as white ash.
It is worse in humid places, but the rain disrupts it....

plantwise.org

Corn stunt disease


20137804404.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Corn stunt disease
Recognize the problem
When leafhoppers attack the corn, first the leaves become reddish. Newly
developing leaves may develop small yellow spots, which later join together to
form stripes that run the length of the leaf. The plants remain dwarfed,
resulting in a reduced yield. Sometimes the ear remains with no grain.
Background
The leafhopper...

plantwise.org

Bacteriosis in bell pepper


20137804407.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Bacteriosis in bell pepper
Recognize the problem
Bacteriosis affects the leaves and sometimes the fruits. The leaves show some
dark spots starting from the underside. When the attack is severe, the leaves
become dry and fall. Spot like scabs also appear on the fruits.
Background
Bacteriosis, which is also an important disease in tomato, is caused by a
bacterium...

plantwise.org

Silky cane weevil


20137804411.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Silky cane weevil
Recognize the problem
The weevil causes very severe damage. It almost completely destroys mature
stems, leaving only decayed and fermented dry bagasse. The damage is
caused by worms that make large holes inside the sugarcane stems, completely
destroying them.
The yield decreases and there is less chancaca. The silky cane weevil is an
insect that...

plantwise.org

Purple blotch in onions


20137804412.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Purple blotch in onions
Recognize the problem
Purple blotch is one of the diseases that cause most damage to the onion. It
causes deep white spots with a yellow halo and a purple or red centre. In
humid climates, the spot surface becomes dark or coffee-colored. Within 2 to 3
weeks, these spots surround the leaves. In the bulbs, the infection appears
close to...

plantwise.org

Sugarcane white grub


20137804414.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Sugarcane white grub
Recognize the problem
This insect pest is known as white grub or root borer. The worms are curved
(C-shaped) and white to cream. Their head is coffee-colored and their tail is
dark with some hair. The grubs can measure around
5
cm in length.
In a young cane, the grubs eat the cane

s roots and shoots.
Be aware, especially in the re-...

plantwise.org

Management of flatid planthoppers


20137804415.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Management of flatid planthoppers
Recognize the problem
The affected plants become yellow and dry. This insect attacks crops like corn,
potato and vegetables. It also attacks forage, some weeds, trees with pods,
tobacco bushes and refuges in the native forest.
The adults live on the undersides of leaves, stems, branches and flowers like in
corn. When they suck the...

plantwise.org

Sugarcane spittlebug


20137804416.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Sugarcane spittlebug
Recognize the problem
The spittlebug feeds more during rainy periods. It sucks the sap from plants
while it injects toxic liquid, causing elongated pale-yellow spots. The leaves
become yellow and dry, reducing the sugar content and increasing the fiber.
The adult creates many holes in the leaves.
Background
The sugarcane spittlebug is a...

plantwise.org

Fruits affected by the fruit fly


20137804417.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Fruits affected by the fruit fly
Recognize the problem
The flies attack several fruit classes. They prefer half-ripe and yellow fruits.
They damage the pulp of fruits and cause early fall. You cannot export the fruit
if fruit flies are present.
The worms can be clearly seen in the fruits. They are more easily seen in
guava and peach due to the color of their pulp...

plantwise.org

Fruit fly control using traps


20137804448.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Fruit fly control using traps
Recognize the problem
A homemade trap serves to catch adult fruit flies.
Background
Traps are effective and cheap. Flies are attracted to the juice from fruits or
other foods like vinegar or chancaca. There are industrial and homemade traps.
Management
The homemade traps are made of plastic bottles, which are cut and filled with
juices...

plantwise.org

Helminthosporiosis in rice


20137804449.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Helminthosporiosis in rice
Recognize the problem
This is one of the most important diseases affecting rice. It can attack in any
stage of development, but the damage is worse at the end of the cycle
because it drastically decreases the yield and the quality.
It looks like coal. Small oval brown spots with a grey center appear on the
leaves. Strong attacks can make...

plantwise.org

Traps for tomato leafminer


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FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Traps for tomato leafminer
Recognize the problem
Tomato leafminers can be captured with this trap.
Background
Traps are prepared using pheromones that attract the male moths. A
pheromone is a sexual attractant for the insects which smell it. Each insect
species has its own pheromone.
By killing the males, moth reproduction is reduced.
Management
Traps can be...

plantwise.org

Use of pheromone for tomato leafminer


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FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Use of pheromone for tomato leafminer
Recognize the problem
Tomato leafminer is a serious pest, but traps help us monitor them and control
them. The traps help because they confuse male moths and prevent them from
meeting the females.
By using the trap, you can detect any moths in the plot.
The trap helps to determine when agrochemicals need to be applied to kill...

plantwise.org

Quince leaf blight


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FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Quince leaf blight
Recognize the problem
Quince leaf blight causes small round dark brown spots that have rings inside
them.
The spots sometimes unite on recently formed fruits, creating large, irregular
black spots on the fruit. The disease may advance and completely kill the fruit.
Background
Quince leaf blight is caused by the fungus
Diplocarpon maculatum
,...

plantwise.org

Bean leafhopper


20137804397.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Bean leafhopper
Recognize the problem
The leafhopper is a small insect (its size is similar to that of a sesame grain). It
is also named empoasca or loritoverde. The leafhopper lives on the lower
surface of bean leaves. Its body is the shape of a large wedge. The colour of
the adult and the young varies from green to light green. They walk on one
side. The...

plantwise.org

Control of leafcutter ants


20137804398.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Control of leafcutter ants
Recognize the problem
Leafcutter ants are a type of ant. They are important pests of maize, rice,
sorghum, bean, vegetables, fruit trees and forest trees.
The main damage they cause is by cutting the the plant leaves. However,
these leaves are not eaten but taken to their nests for the cultivation of a
fungus, on which they feed....

plantwise.org

Control of fall armyworm


20137804399.jpg

FACTSHEETS FOR FARMERS
www.plantwise.org
Created in
Bolivia
,
July
2012
Control of fall armyworm
Recognize the problem
This pest eats the maize bud, which reduces crop growth and yield. The fall
armyworm acts as scraper, defoliator and cutter of maize. It affects a large
number of crops but prefers maize.
Background
It enters the maize bud and from there it eats the plant. If another fall
armyworm enters the same plant, the larger one...

plantwise.org

argentineStemWeevil


argentineStemWeevil.jpg

Figure 1. Lateral dorsal and ventral views of Listronotus bonariensis (Kuschel).
Scale bar =1 mm Image © Fera
Argentine stem weevil
Listronotus bonariensis (Kuschel)
Background
The Argentine stem weevil Listronotus bonariensis (Kuschel) (Coleoptera:
Curculionidae) is an II/A1 EU listed quarantine pest of pasture grasses and cereals
that is native to South America. It has since spread across the Pacific region and is
most notably a pest in New...

planthealthportal.defra.gov.uk

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