Experimental study demonstrates insecticidal and repellent activity of avocado seed biopolyols against Brassica aphids, indicating their viability as sustainable bioinsecticides.
Key Points
To evaluate the insecticidal and repellent efficacy of green-derived biopolyols synthesized from avocado and neem seed waste against the agricultural aphid pests Brevicoryne brassicae and Myzus persicae.
Synthesized biopolyols from avocado and neem seeds through a green chemistry liquefaction process.
Conducted laboratory bioassays to evaluate dose–response mortality curves and repellent action relative to the commercial bioinsecticide Azamax®.
Performed field trials measuring aphid abundance on 'Manteiga' cultivar collard greens treated with the AAA avocado biopolyol formulation or Azamax®.
The AAA avocado seed biopolyol achieved estimated lethal concentrations of LD50 = 64 mg/mL and LD90 = 429 mg/mL (p < 0.001) in laboratory toxicity tests.
At the LD90 concentration, the AAA avocado biopolyol exhibited significant repellent activity against aphids, outperforming the recommended field rate of Azamax®.
Field trials demonstrated that both the AAA biopolyol at LD90 and Azamax® significantly reduced aphid abundance compared to controls, with no significant difference in efficacy between the two treatments.