D’autres études ont montré, qu’une

D’autres études ont montré, qu’une exposition prolongée (4 j) au laboratoire du papillon monarque (Danaus plexippus L.), à une forte densité de pollen de maïs Bt, affectait (7 et 8) :
∙ le comportement (alimentation larvaire réduite),
∙ le développement (poids réduit et temps de développement allongé),
∙ la survie (mortalité supplémentaire).
Une étude du gouvernement britannique a comparé un champ de colza transgénique résistant aux herbicides et un champ de colza conventionnel (9).
La floraison du colza transgénique a baissé de 44%, engendrant une diminution de 24% des papillons qui se trouvent à proximité, liée probablement à la disparition des mauvaises herbes, donc moins de nectar pour se nourrir.
• Insectes bénéfiques
Outre les risques environnementaux directs liés aux cultures Bt, des effets néfastes sur les organismes situés plus haut dans la chaîne alimentaire ont été évalués. Les chrysopes vertes (Chrysoperla carnea), insectes importants dans le contrôle naturel des ravageurs du maïs, souffrent de la toxicité des cultures Bt à travers les arthropodes herbivores dont elles se nourrissent (proies).

Kết quả (Anh) 1:

Other studies have shown that prolonged exposure (4 d) in the laboratory of the monarch butterfly (Danaus plexippus l.), to a high density of pollen from Bt corn, affected (7 and 8):
∙ behavior (reduced Larval feeding),
∙ development (reduced weight and extended development time),
∙ survival (additional mortality).
.A study of the British Government has compared a herbicide-resistant transgenic rapeseed field and a field of conventional rapeseed (9)
the flowering of transgenic rapeseed fell by 44%, causing a decrease of 24% of the butterflies that are nearby, probably linked to the disappearance of weeds, therefore less nectar for food.
• Beneficial insects
.In addition to the direct environmental risks associated with Bt crops, harmful effects on organisms higher in the food chain have been assessed. Green lacewings (Chrysoperla carnea), important insect in the natural control of pests of maize, suffer from the toxicity of Bt crops through herbivorous arthropods which they feed (prey).
.

Kết quả (Anh) 2:

Other studies have shown that prolonged exposure (4 h) in the laboratory of monarch butterfly (Danaus plexippus L.), a high density of Bt corn pollen, affected (7 and 8):
∙ behavior (diet reduced larval)
∙ Development (reduced and extended development time weight)
∙ survival (excess mortality).
A study by the British government has compared a field of transgenic herbicide-resistant oilseed rape and conventional oilseed rape field (9).
flowering transgenic oilseed rape decreased 44%, resulting in a 24% decrease butterflies nearby, probably linked to the disappearance of weeds, so less nectar for food.
• Beneficial Insects
In addition to direct environmental risks associated with Bt crops, adverse effects on organisms higher in the food chain were evaluated. Green lacewings (Chrysoperla carnea), large insects in the natural control of pests of corn, suffer from the toxicity of Bt through herbivorous arthropods which they feed (prey) cultures.

Kết quả (Anh) 3:

Other studies have shown, that prolonged exposure (4 j) at the laboratory of the monarch butterfly (Danaus plexippus L. ), to a high density of pollen from Bt corn, affected (7 and 8) :
∙ the behavior (larval supply reduced) ,
∙ development (reduced weight and development time extension),
∙ the survival (additional mortality) .
A study of the British government was compared to a field of transgenic rapeseed resistant to herbicides and a field of conventional rapeseed (9) .
the flowering of transgenic rapeseed has decreased by 44 %, causing a decrease of 24% of the butterflies which are located in close proximity, probably related to the disappearance of the weeds, therefore less of nectar to feed themselves.
• Beneficial Insects
In addition to the environmental risks direct related to Bt crops, adverse effects on organisms located earlier in the food chain have been assessed. The chrysopes green (Chrysoperla carnea), insects important in the natural control of insect pests of maize, suffer from the toxicity of Bt crops through the herbivorous arthropods which they feed (prey) .