Toxicity of Some Insecticides on the Hymenopteran Parasitoid, Bracon Hebetor (Hymenoptera: Braconidae)

Ebeid, Amany Ramadan; Elbehery, Huda; Farag, N. A.; Gesraha, M. A.

doi:10.14207/ejsd.2017.v6n4p72

Cited by 2 publications

(1 citation statement)

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“…Also, Faal (2010) found that chlorpyrifos was highly toxic and affected H. hebetor. And Ebeid et al (2017) showed the acute toxicity and the effects of profenofos, cyfluthrin, and the IGR on the activity of the larval parasitoid, B. hebetor. Cyfluthrin was the most toxic one which was dangerous on all life stages of B. hebetor, influencing the number of laid eggs by the parasitoid and percent of pupation and leading to failure of adult emergence.…”

Section: Discussionmentioning

confidence: 99%

Impact of conventional insecticides on two bollworms and their indirect effects on the ectoparasitoid, Bracon brevicornis (Wesmael) (Hymenoptera: Braconidae)

Kandil

Moustafa

2019

Bull Natl Res Cent

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Background: Cotton bollworms such as Pectinophora gossypiella and Earias insulana are serious pests which destroy the cotton plant, and Bracon brevicornis is a parasitoid which attacked the larvae of bollworms. Results: In this study, experiments were performed to investigate and evaluate the toxicity of etofenprox and chlorpyrifos insecticides against newly hatched larvae of Pectinophora gossypiella and Earias insulana. Some biological aspects of compound effects on larval and pupal duration, percentage of mortality, and percentage of adult emergence which resulted from treated newly hatched larvae were studied. The results revealed that LC 50 was 0.7 and 0.87 ppm when P. gossypiella was treated with etofenprox and chlorpyrifos, respectively, while LC 50 was 0.09 and 0.73 ppm when E. insulana was treated with etofenprox and chlorpyrifos, respectively. The obtained results showed that the percentage of mean larval mortality was 65.0 and 63.0% for treated P. gossypiella, while it was 71.0 and 66.0% for treated E. insulana. The corresponding figure for pupal percentage mortality was 8.0 and 10.0% for treated P. gossypiella, but it was 5.0 and 2.0% for treated E. insulana, with etofenprox and chlorpyrifos, and a prolongation effect in larval and pupal development (total immature stage) resulted from treated both bollworms as follows: 35.5 and 32.4 days for treated P. gossypiella compared with 21.9 days in control and 34.7 and 23.2 days for treated E. insulana compared with 23.1 days in control. The indirect effect of etofenprox and chlorpyrifos on the total immature stage of Bracon brevicornis was 18.2 and 19.5 days compared with 14.3 days in control when B. brevicornis parasitized on P. gossypiella larvae while it was 19.8 and 20.6 days compared with 15.2 days when B. brevicornis parasitized on E. insulana larvae. Conclusion: The life cycle of B. brevicornis after parasitism on P. gossypiella and E. insulana larvae treated with etofenprox and chlorpyrifos were increased than the control larvae.

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Section: Discussionmentioning

confidence: 99%

Impact of conventional insecticides on two bollworms and their indirect effects on the ectoparasitoid, Bracon brevicornis (Wesmael) (Hymenoptera: Braconidae)

Kandil

Moustafa

2019

Bull Natl Res Cent

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Non-target effect of pesticides in rice environment

Ray

Adak

et al. 2021

Oryza

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Agriculture has always been affected by intractable pests. Conventional agriculture still relies on the use of several pesticides to control various pests to ensure the yield of the crop and to feed a constantly growing population. To reduce the pest menace, the fatuous behavior of people as well as a natural proclivity towards the use of pesticides in a non-judicious manner, has caused several ecological backlashes such as secondary pest outbreak, pest resurgence and non-target organism's exploitation. Effects of pesticides on non-target organisms area worldwide concern and contention are the basis for most legislation regarding usage of specific pesticides. Pesticides, besides their effect on pests, would also affect several beneficial non-targets. The effect of pesticides could be lethal and may prove catastrophic or sublethal and stimulate the growth and development of non targeted biota's. Hence, this review approaches well-analyzed hindsight regarding the effect of pesticides on the natural enemies as well as other non-target organisms present in the rice agroecosystem.

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Toxicity of Some Insecticides on the Hymenopteran Parasitoid, Bracon Hebetor (Hymenoptera: Braconidae)

Cited by 2 publications

References 11 publications

Impact of conventional insecticides on two bollworms and their indirect effects on the ectoparasitoid, Bracon brevicornis (Wesmael) (Hymenoptera: Braconidae)

Impact of conventional insecticides on two bollworms and their indirect effects on the ectoparasitoid, Bracon brevicornis (Wesmael) (Hymenoptera: Braconidae)

Non-target effect of pesticides in rice environment

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