12. poisoning of honey bees Flashcards
what are bees severely and fatally affected by
pesticides and fertilizers
poisonous plants
acaricides
what plant causes accumulation of toxins in bees and what toxin
spotted loco wood - *astragalus lentiginosus *
selenium
effect of plant poisoning on bees
mare gradual and last longer pesticide poisoning (in the same geographical area, in the same time each year)
toxicity of pollen
- only pollen from some plants
- can kill adults or some can kill when passed to the brood
other types of plant toxins
honey can be psychoactive and toxic to humans but not to bees or larvae
poisoning of bee during blooming
due to insecticides applied to crops
systemic insecticides
neonicotinoids like imidacloprid and fipronil are toxic and persistent also produce immune suppression
normal die off rate of bees
less than 100 per day
low kill of bees
200-400 a day
moderate kill of bees
500-900 per day
high kill of bees
over 1000 bees per day
effects of pesticides on honeybee colonies :
Acute, subletal and chronic effects
poisoning symptoms
excessive number of dead bees
lack of foraging bees
aggressiveness
paralysis and abnormal activity
regurgitation of the honey
abnormal communication dances
bees can be poisoned with?
Sevin or dieldrin
can queens be affected?
yes
