Toxicity of some insecticides to<i>Apanteles plutellae</i>a parasite of the diamond back moth∗

Mani, M.; Krishnamoorthy, A.

doi:10.1080/09670878409370865

Cited by 15 publications

(7 citation statements)

References 3 publications

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“…Deltamethrin had high toxicity to adults of A. plutellae and Diadegma eurcerophaga, parasitoids of P. xylostella . Most chemical insecticides tested, including pyrethroids which had low toxicity to the diamondback moth, were highly toxic to its parasitoid ( Mani and Krishnamoorthy , 1984; Talekar and Yang , 1991). The insecticide cypermethrin, when P. xylostella became resistant, was even harmful to the agroecosystem of vegetable fields by killing parasitoids ( Idris and Grafius , 1993).…”

Section: Discussionmentioning

confidence: 99%

Influence of mixed biocide GCSC‐BtA on the pupae and adult stages of Apanteles plutellae Kurd. (Hym., Braconidae) and its host.  Plutella xylostella (L.) (Lep., Plutellidae)

Şengonça

Liu

2001

Anz Schadlingskd

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This paper deals with the influence of the mixed biocide GCSC‐BtA on the pupal and adult stages of Apanteles plutellae Kurd. (Hym., Braconidae) and its host, Plutella xylostella (L.) (Lep., Plutellidae). The results show that mortalities of the pupae of P. xylostella in the direct‐dip bioassay were 84.67 %, that of the adults in the residue bioassay at 1.2500 mg/ml concentration of GCSC‐BtA were 78.00 % which were significantly higher than the mortality values for the pupae with 54.62 % and adults with 48.13 % of A. plutellae. In contrast, cypermethrin showed extremely high toxicity to the pupae with 94.58 % and adults with 86.00 % mortality values of A. plutellae as compared to the low mortality values of 42.14 % for the pupae and 32.11 % for the adults of P. xylostella, with the same concentrations and bioassay methods. The LC50 values of GCSC‐BtA were 0.3402, 0.5516 and 1.2405, 1.9480 mg/ml for the pupae and adults of P. xylostella and A. plutellae, respectively, while the LC50 values for cypermethrin were 1.5652, 2.3471 and 0.1096, 0.1152 mg/ml, respectively. GCSC‐BtA was found more toxic to the pupae and adults of P. xylostella and safer to the pupae and adults of A. plutellae than cypermethrin. The possibilty of using GCSC‐BtA against P. xylostella under partial control by A. plutellae in vegetable fields is discussed.

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Section: Discussionmentioning

confidence: 99%

Influence of mixed biocide GCSC‐BtA on the pupae and adult stages of Apanteles plutellae Kurd. (Hym., Braconidae) and its host.  Plutella xylostella (L.) (Lep., Plutellidae)

Şengonça

Liu

2001

Anz Schadlingskd

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“…This effect was reversed when exposure to the biopesticide was stopped for several generations 34. However, the insecticide phosalone was also included in our IPM programme since it was known to be non‐toxic towards C plutellae 35 and other beneficial insects 36. It should be noted that phosalone might affect C carnea populations, since the number of larvae of the predator decreased slightly very soon after the first week of application of the insecticide.…”

Section: Discussionmentioning

confidence: 99%

Pheromone-based integrated pest management to control the diamondback mothPlutella xylostella in cabbage fields

Reddy

Guerrero

2000

Pest Manag. Sci.

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Biorational and regular insecticide applications were evaluated for management of the diamondback moth (DBM) Plutella xylostella in cabbage (Brassica oleracea var capitata) in Karnataka State, India, in 1996 and 1997. The IPM programme, based on the pheromone trap catch threshold of eight moths per trap per night, included utilization of the parasitoid Cotesia plutellae.(250 000 adults ha À1 ), the predator Chrysoperla carnea (2500 eggs ha À1 ), the neem-based chemical nimbecidine (625 ml ha À1 ), the bacterium Bacillus thuringiensis (500 ml ha À1 ), and the synthetic insecticide phosalone (2.8 litre ha À1 ). The IPM programme induced a reduction of trap catches, egg and larval populations and, therefore, a low level of damage to the crop. The economic analysis showed that the cost of the IPM treatments was also considerably lower than that of ordinary insecticide practice (average of $62 relative to $123 ha À1 , respectively). Gross pro®t was also clearly higher in IPM plots than in farmer's ®elds, ranging from $777 to $810 ha À1 in the IPM plots compared with $456 to $462 ha À1 in the insecticide-treated ®elds. As a consequence of lower input costs and higher gross pro®t, net pro®t in IPM treatments was even more favourable, and the economic savings associated with the utilization of the IPM programme amounted to $380

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“…2000). In literature, there have been many reports on the lethal effects of insecticides on natural enemies in IPM programs (Mani and Krishnamoorthy 1984; Talekar and Yang 1991; Hassan et al. 1994; Wright and Verkerk 1995; Hawkins et al.…”

Section: Introductionmentioning

confidence: 99%

“…Our results suggest that the attraction of the wasps to the permethrin-treated infested plants increases the risk of their exposure to this insecticide. been many reports on the lethal effects of insecticides on natural enemies in IPM programs (Mani and Krishnamoorthy 1984;Talekar and Yang 1991;Hassan et al 1994;Wright and Verkerk 1995;Hawkins et al 1997), but there are few reports on the sublethal effects of the insecticides on the performance of natural enemies such as the larval development, adult longevity, fecundity and sex ratio. Even less information is available on the effects of the application of insecticides on the foraging behaviour of natural enemies (Croft and Brown 1975;Haynes 1988;Desneux et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Inhibitory effects of permethrin on flight responses, host‐searching, and foraging behaviour of Cotesia vestalis (Hymenoptera: Braconidae), a larval parasitoid of Plutella xylostella (Lepidoptera: Plutellidae)

Kawazu

Shimoda

Kobori

et al. 2010

J Applied Entomology

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Although it is well known that the application of broad‐spectrum synthetic insecticides reduces the effectiveness of natural enemies, the details of the actual mechanisms, including the lethal and sublethal effects of this reduction, are not fully understood. The inhibitory effects of a pyrethroid insecticide (permethrin), Adion 20% EC on the flight responses, host‐searching behaviour and foraging behaviour of Cotesia vestalis (Hymenoptera: Braconidae), a larval parasitoid of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae), were investigated under laboratory conditions. In choice trials, the wasps showed significant preference for P. xylostella‐infested Komatsuna plants over insecticide‐treated plants, suggesting an inhibitory effect of the insecticide on the flight response of C. vestalis. When offered a pair of plants, the wasps showed a significant preference for P. xylostella‐infested plants compared to uninfested plants. However, significantly more wasps were attracted to infested permethrin‐treated plants than to uninfested plants, suggesting that the wasps are attracted to the volatile infochemicals from the infested plants, even if treated with permethrin. The searching time was significantly shorter and the mortality of C. vestalis adults on the insecticide‐treated plants significantly higher than in the control plants treated with distilled water. These results suggest that the application of the insecticide had an inhibitory effect on the wasps’‐searching behaviour and consequently reduced the effectiveness of C. vestalis as a biological control agent against P. xylostella. In addition, the strength of the inhibitory effect of permethrin on the attraction of the wasps to the plants is critical to the survival of C. vestalis. Our results suggest that the attraction of the wasps to the permethrin‐treated infested plants increases the risk of their exposure to this insecticide.

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Toxicity of some insecticides toApanteles plutellaea parasite of the diamond back moth∗

Cited by 15 publications

References 3 publications

Influence of mixed biocide GCSC‐BtA on the pupae and adult stages of Apanteles plutellae Kurd. (Hym., Braconidae) and its host.  Plutella xylostella (L.) (Lep., Plutellidae)

Influence of mixed biocide GCSC‐BtA on the pupae and adult stages of Apanteles plutellae Kurd. (Hym., Braconidae) and its host.  Plutella xylostella (L.) (Lep., Plutellidae)

Pheromone-based integrated pest management to control the diamondback mothPlutella xylostella in cabbage fields

Inhibitory effects of permethrin on flight responses, host‐searching, and foraging behaviour of Cotesia vestalis (Hymenoptera: Braconidae), a larval parasitoid of Plutella xylostella (Lepidoptera: Plutellidae)

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Toxicity of some insecticides toApanteles plutellaea parasite of the diamond back moth∗

Cited by 15 publications

References 3 publications

Influence of mixed biocide GCSC‐BtA on the pupae and adult stages of Apanteles plutellae Kurd. (Hym., Braconidae) and its host. Plutella xylostella (L.) (Lep., Plutellidae)

Influence of mixed biocide GCSC‐BtA on the pupae and adult stages of Apanteles plutellae Kurd. (Hym., Braconidae) and its host. Plutella xylostella (L.) (Lep., Plutellidae)

Pheromone-based integrated pest management to control the diamondback mothPlutella xylostella in cabbage fields

Inhibitory effects of permethrin on flight responses, host‐searching, and foraging behaviour of Cotesia vestalis (Hymenoptera: Braconidae), a larval parasitoid of Plutella xylostella (Lepidoptera: Plutellidae)

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Influence of mixed biocide GCSC‐BtA on the pupae and adult stages of Apanteles plutellae Kurd. (Hym., Braconidae) and its host.  Plutella xylostella (L.) (Lep., Plutellidae)

Influence of mixed biocide GCSC‐BtA on the pupae and adult stages of Apanteles plutellae Kurd. (Hym., Braconidae) and its host.  Plutella xylostella (L.) (Lep., Plutellidae)