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137641
BT cotton
Descrição
New South Wales - Higher School Certificate (HSC) Biology (Task 3) Mapa Mental sobre BT cotton, criado por janmart.tenedora em 22-06-2013.
Sem etiquetas
biology
task 3
biology
task 3
new south wales - higher school certificate (hsc)
Mapa Mental por
janmart.tenedora
, atualizado more than 1 year ago
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Criado por
janmart.tenedora
quase 11 anos atrás
152
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0
Resumo de Recurso
BT cotton
Genetically engineered
form of cotton
Advantage of biotech in agrculture
Increases productivity
Development
insertion of synthetic version of gene
from bacterium
Bacillus thuringiensis
Into cotton
Induces the plant
to produce own Bt toxins
destroys pest e.g. bollworn
Causes production of Bt toxin
in all parts of plant
During life span
Advantages and disadvantages
Cons
financial damage to traditional farmers
Risk of crossbreeding with native plants
Reduced variation, increased susceptability to disaster
Doesn't always work
Some insects are unaffected
aphids
requires more pesticides
wastes valuable money and time
Indian farmers heavily reliant on its success for survival
Crop failure may often result in farmer suicide
Pros
Lower risk of poisoning ppl who work with pesticides
Less danger to wildlife and environment
Fewer pesticides therefore lower costs
Without Bt?
Reliance on pesticides
More susceptible to pests
lepidopteran larvae
Cotton Harlequin bug
natural process
planted (natural or machine)
in good soil moisture
warm temperature
usually a week to emerge
occasionally disease sets in
Delays seed's appearance
Crust may also interfere
must be broken via irrigation or machine
Bt stands for Bacillus thuringiensis
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