Evaluating the insecticidal efficiency of some legumes extracts against Bactrocera zonata (Diptera : Tephritidae)‎

Abstract EN

Insecticidal and biological activity of three legumes; Lupinus luteus L., Glycine max L.

and Cicer arietinum; seeds ethanolic extracts against adult and egg stages of peach fruit fly Bactrocera zonata (Saunders) (Diptera: Tephritidae) was investigated under laboratory conditions.

The phytochemical screening of ethanolic extract of the tested three legumes showed the presence of alkaloids, steroids, flavonoids, terpenoids, tannins and saponins in G.

max extract and absence of saponins in C.

arietinum .

Also, terpenoids, flavonoids and tannins are absent in L.

luteus ethanolic extract.

Ethanolic extracts of the tested legume seeds achieved variable toxicity against adult and egg stages of B.

zonata.

Ethanolic extracts of G.

max and C.

arietinum seeds (LC50 = 366.2 and 437.3 mg L-1, respectively) were more toxic against insect adults than L.

luteus seeds ethanolic extract (LC50 = 627.5 mg L-1) after 8 days of exposure.

Ethanolic extract of C.

arietinum achieved the higher ovicidal activity (Egg hatchability reached to 0% at 1000 mg / L) compared to the other extracts.

G.

max and C.

arietinum seeds ethanolic extracts were the most potent on the adult fecundity with 2.0 and 0.0 egg laid / female at 1000 mg / L, respectively compared to 49.0 egg / female in control.

The tested ethanolic extracts of the three tested plant seeds reduced the adult longevity of B.

zonata and the effect was concentration dependent.

Results of the present study suggest that, plant extracts can be an effective tool in integrated pest management programs for the control of fruit flies.