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How a South American Wasp Saved an African Crop | National Geographic


how can we grow our food with fewer

how can we grow our food with fewer harmful chemicals more and more farmers

harmful chemicals more and more farmers

harmful chemicals more and more farmers are managing pests with natural

are managing pests with natural

are managing pests with natural combatants called bio pesticides these

combatants called bio pesticides these

combatants called bio pesticides these do the job of regular pesticides but

do the job of regular pesticides but

do the job of regular pesticides but they come from natural sources like

they come from natural sources like

they come from natural sources like insects plants and bacteria of all bio

insects plants and bacteria of all bio

insects plants and bacteria of all bio pesticide sales in 2011 bio chemicals

pesticide sales in 2011 bio chemicals

pesticide sales in 2011 bio chemicals such as scented plant extracts had the

such as scented plant extracts had the

such as scented plant extracts had the largest share sales also included

largest share sales also included

largest share sales also included microbials such as bacteria and viruses

microbials such as bacteria and viruses

microbials such as bacteria and viruses more than 300 species of insects and

more than 300 species of insects and

more than 300 species of insects and other combatants like pheromones and

other combatants like pheromones and

other combatants like pheromones and roundworms these products are a small

roundworms these products are a small

roundworms these products are a small part of the total pesticide market but

part of the total pesticide market but

part of the total pesticide market but their share is growing as consumers

their share is growing as consumers

their share is growing as consumers demand more chemical free food sales of

demand more chemical free food sales of

demand more chemical free food sales of biopesticides are lowest in Africa but

biopesticides are lowest in Africa but

biopesticides are lowest in Africa but in the 1980s one of them had a huge

in the 1980s one of them had a huge

in the 1980s one of them had a huge impact on the region’s cassava crop in

impact on the region’s cassava crop in

impact on the region’s cassava crop in 1973 the cassava mealy bug was

1973 the cassava mealy bug was

1973 the cassava mealy bug was accidentally brought to Africa from

accidentally brought to Africa from

accidentally brought to Africa from South America and within a few years it

South America and within a few years it

South America and within a few years it decimated the continents cassava crops a

decimated the continents cassava crops a

decimated the continents cassava crops a staple food for millions of people

staple food for millions of people

staple food for millions of people scientists looked to South America for a

scientists looked to South America for a

scientists looked to South America for a natural enemy of the mealy bug

natural enemy of the mealy bug

natural enemy of the mealy bug they found a special parasitoid wasp and

they found a special parasitoid wasp and

they found a special parasitoid wasp and introduced it in Africa but how could a

introduced it in Africa but how could a

introduced it in Africa but how could a wasp save the day while a mealy bug is

wasp save the day while a mealy bug is

wasp save the day while a mealy bug is sucking sap from cassava leaves a female

sucking sap from cassava leaves a female

sucking sap from cassava leaves a female wasp swoops in and lays its eggs in the

wasp swoops in and lays its eggs in the

wasp swoops in and lays its eggs in the melee buck when the eggs hatch the wasp

melee buck when the eggs hatch the wasp

melee buck when the eggs hatch the wasp larvae eat the mealy bug from the inside

larvae eat the mealy bug from the inside

larvae eat the mealy bug from the inside out killing it the new wasp soon mature

out killing it the new wasp soon mature

out killing it the new wasp soon mature and the process starts over again the

and the process starts over again the

and the process starts over again the infestation took a few years to fully

infestation took a few years to fully

infestation took a few years to fully manage but the economic benefits were

manage but the economic benefits were

manage but the economic benefits were huge for every dollar spent on mealy bug

huge for every dollar spent on mealy bug

huge for every dollar spent on mealy bug control one hundred fifty dollars were

control one hundred fifty dollars were

control one hundred fifty dollars were returned to the cassava farmers this is

returned to the cassava farmers this is

returned to the cassava farmers this is one of the best demonstrations of how

one of the best demonstrations of how

one of the best demonstrations of how effective natural combatants can be and

effective natural combatants can be and

effective natural combatants can be and wasps are now being used in Southeast

wasps are now being used in Southeast

wasps are now being used in Southeast Asia to control their mealy bug problem

Asia to control their mealy bug problem

Asia to control their mealy bug problem a solution derived directly from Mother

a solution derived directly from Mother

a solution derived directly from Mother Nature and good news for farmers in the

Nature and good news for farmers in the

Nature and good news for farmers in the environmental life

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