Application of insecticides to tobacco cultures of
Burley (cv. 531) and Bright (cv. BTMS21) in field
tests reduced aphid incidence in 1998. Trials were
conducted at two locations: Scafati (Southern Italy)
and Bovolone (Northern Italy); treatments,
consisting of eight products, were applied three
times starting on the transplant date. Instead, the
bifenthrin+oil treatment was repeated every four
days for the first fifty days after transplanting.
Bifenthrin+oil, imidacloprid, pymetrozine,
bifenthrin, acetamiprid and pirimicarb showed a
good efficacy, reducing infestation in the range
80% - 99% at Scafati and 95-99% at Bovolone.
Verticillium lecanii was clearly inferior to others
insecticides, reducing the infestation level only by
49%. Tega-bion was not at all effective. Oil caused
no phytotoxicity based on visual examination of
treated plants.