Impact of chloronicotinyl insecticide, imidacloprid on egg, egg-larval and larval parasitoids under laboratory conditons

• Autorzy: Preetha G. , Manoharan T. , Stanley J. , Kuttalam S.

Warianty tytułu

PL

Wpływ insektycydu chloronikotynowego imidacloporidu na parazytoidy jaj, jaj i larw oraz larw w warunkach laboratoryjnych

• Języki publikacji: EN

Abstrakty

EN

Laboratory studies were carried out to compare the toxicity of the chloronicotinyl insecticide, imidacloprid on parasitoids. The studies took place at the Tamil Nadu Agricultural University, Coimbatore from 2006–2007. Imidacloprid was tested against three beneficial insects viz., an egg parasitoid, egg larval parasitoid and a larval parasitoid representing two families of Hymenoptera: Trichogrammatidae (Trichogramma chilonis Ishii) and Braconidae (Chelonus blackburni Cameron; Bracon hebetor Say) that attack insect pests of cotton. The toxicity of imidacloprid was evaluated by treating the parasitized eggs using an atomizer in the case of T. chilonis and glass scintillation vial residue bioassay method for the adults of C. blackburni and B. hebetor. The toxicity of imidacloprid to parasitoids was compared with another neonicotinoid, named thiamethoxam, and a standard check, methyl demeton. Imidacloprid 17.8 SL did not cause any adverse effects on the adult emergence and parasitization of T. chilonis. At the recommended dose of imidacloprid [25 g active substance (a.s.)/ha], 90.67 and 85.32 per cent adult emergence and parasitization was recorded, respectively. The recommended dose of imidacloprid caused 56 per cent mortality and was found to have moderate impact on the adults of C. blackburni. On the other hand, it was found to be toxic to the parasitoid B. hebetor, causing 70 per cent mortality at 48 hours after treatment (HAT). The data presented here will provide pest managers with specific information on the compatibility of selected insecticides with natural enemies attacking pests of cotton, Gossypium hirsutum L.

PL

W latach 2006–2007 na Uniwersytecie Rolniczym w Tamil Nadu, Coimbatore, wykonano badania laboratoryjne, w celu porównania toksyczności insektycydu chloronikotynowego imidacloprid dla parazytoidów. Testowano działanie imidaclopridu przeciwko trzem pożytecznym owadom, mianowicie parazytoidowi jaj, jaj i larw oraz larw reprezentujących dwie rodziny Hymenoptera: Trichogrammatidae (Trichogramma chilonis Ishii) i Braconidae (Chelonus blackburni Cameron; Bacon hebctor Say), atakujących szkodniki bawełny. Toksyczność imidaclopridu oceniono traktując jaja parazytoidów przy użyciu atomizera w przypadku T. chilonis i biotestem scyntylacyjnym w szkalnej probówce do określania pozostałości w przypadku dorosłych osobników C. blackburni i B. hebctor. Toksyczność ta dla parazytoidów została porównana z innym związkiem – neonicotinoid thiamethoxam oraz standardową kontrolą o nazwie: methyl demeton. Imidacloprid 18,8 SL nie spowodował niekorzystnego działania na pojaw dorosłych osobników i pasożytowanie T. chilonis. Przy zalecanej dawce imidaclopridu (25 g s.a./ha) stwierdzono, odpowiednio 90,67 i 85,32% pojawu osobników dorosłych oraz parazytoidów. Zalecana dawka imidaclopridu spowodowała 56% śmiertelności i miała umiarkowany wpływ na osobniki dorosłe C. blackburni, natomiast dla parazytoidu B. hebctor, była toksyczna, powodując 70% śmiertelności po 48 godzinach. Zaprezentowane w pracy dane dostarczają służbie ochrony roślin specyficznej informacji dotyczącej kompatybilności wybranych insektycydów z wrogami naturalnymi atakującymi szkodniki bawełny, Gossypium hirsutum L.

Słowa kluczowe

EN

chloronicotinyl insecticide; insecticide; imidacloprid; egg parasitoid; parasitoid; egg-larval parasitoid; larval parasitoid; laboratory condition; toxicity; Chelonus blackburni; Trichogramma chilonis; Bracon hebetor

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2010
• Tom: 50
• Numer: 4
• Opis fizyczny: p.535-540,ref.

Twórcy

autor

Preetha G.

• Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India

autor

Manoharan T.

autor

Stanley J.

autor

Kuttalam S.

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