Why does genetic variation increase the chance that some individuals in a population will survive? Genetically diverse populations display high phenotypic variation. If changing environmental conditions favor a particular phenotype there is a good chance that genetically diverse population will have some individuals who have that advantageous phenotype.
As well, the candles produce large particles in their smoke and there have been concerns about how safe it is to regularly breathe in this smoke. Mosquito coils: Like citronella candles, mosquito coils produce a smoke that confuses mosquitoes. The coils contain the insecticide allethrin.
CITRONELLA OIL Overview Information. Citronella oil is made by steam distillation of certain species of grasses in the Cymbopogon grouping of plants. Ceylon or Lenabatu citronella oil is produced from Cymbopogon nardus, and Java or Maha Pengiri citronella oil is produced from Cymbopogon winterianus.Lemongrass (Cymbopogon citratus) also belongs to this grouping of plants, but it is not used to make citronella oil.eylon or Lenabatu citronella oil is produced from Cymbopogon nardus, and Java or Maha Pengiri citronella oil is produced from Cymbopogon winterianus. Lemongrass (Cymbopogon citratus) also belongs to this grouping of plants, but it is not used to make citronella oil.