Laboratory and Field Evaluations of Imidacloprid Against<i>Melanoplus sanguinipes</i>(Orthoptera: Acrididae) on Small Grains

Tharp, Cecil I.; Johnson, Gregory D.; Onsager, Jerome A.

doi:10.1603/0022-0493-93.2.293

Cited by 12 publications

(10 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These values are near or below those estimated for imidacloprid in other insects. Thus, the LD 50 of imidacloprid in the migratory grasshopper, Melanoplus sanguinipes (F.), was 53 mg/l for the oral applications (Tharp et al. 2000), while its LC 50 in the adult whiteflies collected from Arizona cotton was 100 mg/l (Li et al.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of insecticidal and genotoxic effects of imidacloprid and acetochlor in Drosophila melanogaster

Frantzios

Paptsiki

Sidiropoulou

et al. 2008

J Applied Entomology

View full text Add to dashboard Cite

Two pesticides, the insecticide imidacloprid and the herbicide acetochlor, were evaluated for their insecticidal and genotoxic effects in Drosophila melanogaster. Their insecticidal effects were assessed by calculating LC50 values after acute or chronic exposure of larvae and adults to different concentrations of the test compounds. After acute exposure, the LC50 of imidacloprid was 7.59 × 10−5 M for larvae and 1.43 × 10−4 M for adults, and after chronic exposure, it was 2.67 × 10−5 M and 6.09 × 10−5 M for larvae and adults, respectively. On the contrary, the herbicide acetochlor showed no acute or chronic insecticidal effect against either larvae or adults, even at very high concentrations (8 × 10−3 M). For the evaluation of genotoxic properties of the two pesticides, the Somatic Mutation and Recombination Test in D. melanogaster was used. Our results suggest that neither imidacloprid nor acetochlor exhibits mutagenic or recombinogenic activity at applicable concentrations.

show abstract

Section: Resultsmentioning

confidence: 99%

Evaluation of insecticidal and genotoxic effects of imidacloprid and acetochlor in Drosophila melanogaster

Frantzios

Paptsiki

Sidiropoulou

et al. 2008

J Applied Entomology

View full text Add to dashboard Cite

show abstract

“…While our reported LD50 is high it may be due to the delivery method, toxicological endpoint, and metabolism. Grasshoppers ( Melanoplus sanguinipes ) sustain a long period of “debilitation” before death, with high oral and contact LD50s of 53.38 and 96 ppm (µg/g), respectively, for IMD at 72 hours after treatment 47 . In honeybees, mortality is delayed from high doses of IMD, compared to moderate doses 48 , prompting use of a 96 h endpoint.…”

Section: Discussionmentioning

confidence: 99%

“…Approximately 1 hour after treatment, the DCMD again responded to the looming stimulus in a stable manner (post-effect phase) that was maintained until the end of the recording period, two hours and 20 minutes after treatment. Acute behavioural effects of IMD toxicity include periods of trembling and sporadic movements of the abdomen and legs, followed by paralysis in the honeybee ( Apis mellifera ) 17 , flea ( Ctenocephalides felis ) 56 , beetle ( Tenebrio molitor ) 57 , and grasshopper ( Melanoplus sanguinipes ) 47 . Our results are consistent with other studies that found initial neuronal effects to be hyperexcitation followed by neural silence 57, 58 , which may be attributed to receptor desensitization 12, 59 .…”

Section: Discussionmentioning

confidence: 99%

A sublethal dose of a neonicotinoid insecticide disrupts visual processing and collision avoidance behaviour in Locusta migratoria

Parkinson

Little

Gray

2017

Sci Rep

View full text Add to dashboard Cite

Neonicotinoids are known to affect insect navigation and vision, however the mechanisms of these effects are not fully understood. A visual motion sensitive neuron in the locust, the Descending Contralateral Movement Detector (DCMD), integrates visual information and is involved in eliciting escape behaviours. The DCMD receives coded input from the compound eyes and monosynaptically excites motorneurons involved in flight and jumping. We show that imidacloprid (IMD) impairs neural responses to visual stimuli at sublethal concentrations, and these effects are sustained two and twenty-four hours after treatment. Most significantly, IMD disrupted bursting, a coding property important for motion detection. Specifically, IMD reduced the DCMD peak firing rate within bursts at ecologically relevant doses of 10 ng/g (ng IMD per g locust body weight). Effects on DCMD firing translate to deficits in collision avoidance behaviours: exposure to 10 ng/g IMD attenuates escape manoeuvers while 100 ng/g IMD prevents the ability to fly and walk. We show that, at ecologically-relevant doses, IMD causes significant and lasting impairment of an important pathway involved with visual sensory coding and escape behaviours. These results show, for the first time, that a neonicotinoid pesticide directly impairs an important, taxonomically conserved, motion-sensitive visual network.

show abstract

“…Leaf discs treated with imidacloprid and then fed to the migratory grasshopper Melanoplus sanguinipes (Fabr.) produced a lower LD 50 than topical applications (Tharp et al 2000). For Piper extracts, toxicity will occur mainly through consumption of, rather than contact with, treated plant material, which will help conserve beneficial nontarget insects exposed to the extracts.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of Piper nigrum (Piperaceae) extract for control of insect defoliators of forest and ornamental trees

et al. 2007

View full text Add to dashboard Cite

The acute toxicities of an extract obtained from a plant within the Piperaceae family and related synthetic analogues were tested against four common Canadian forest pest insects. The acute toxicity of the extract from black pepper, Piper nigrum L., was assessed after 1, 24, and 72 h by the percent larval mortality. The 24 h LC 50 estimates for the P. nigrum extract were (in order of decreasing sensitivity) 0.012% for the introduced pine sawfly, Diprion similis (Hartig) (Hymenoptera: Diprionidae), 0.053% for the forest tent caterpillar, Malacosoma disstria Hubner (Lepidoptera: Lasiocampidae), 0.282% for the gypsy moth, Lymantria dispar (L.) (Lepidoptera: Lymantriidae), and 0.998% for the spruce budworm, Choristoneura fumiferana (Clemens) (Lepidoptera: Torticidae). There was no significant increase in mortality after 72 h. Seventy percent of L. dispar larvae dropped off or moved from branches within 1 h of application of 0.2% P. nigrum extract, indicating that these compounds have a repellent effect. Pipercide and nor-pipercide were more toxic to L. dispar and M. disstria larvae than piperolein A and a P. sarmentosum Roxb. amide 72 h after either oral or topical administration of these compounds. Toxic effects of piperamides were more pronounced by oral ingestion. Ninety percent mortality of L. dispar larvae occurred following an oral dose of 5 µg pipercide in diet, whereas mortality was only 40% following topical treatment at 5 µg pipercide/insect. Whole Piper extracts might be useful for the control of sawflies and tent caterpillars in small-scale applications, based on the demonstrated efficacy and reduced risk potential. 522Résumé-Nous avons évalué la toxicité aiguë d'extraits d'une plante de la famille des Piperaceae et d'analogues synthétiques apparentés chez quatre espèces communes d'insectes Can. Entomol. 139: 513-522 (2007) des forêts canadiennes. Nous avons déterminé la toxicité aiguë d'extraits du poivrier noir, Piper nigrum L., après 1, 24 et 72 h d'après le pourcentage de mortalité des larves. Les valeurs estimées de LC 50 après 24 h pour les extraits de P. nigrum sont par ordre de sensibilité décroissante, 0,012 % chez le diprion importé du pin, Diprion similis (Hartig) (Hymenoptera : Diprionidae), 0,053 % chez la livrée des forêts, Malacosoma disstria Hubner (Lepidoptera : Lasiocampidae), 0,282 % chez la spongieuse, Lymantria dispar (L.) (Lepidoptera : Lymantriidae) et 0,998 % chez la tordeuse des bourgeons de l'épinette, Choristoneura fumiferana (Clemens) (Lepidoptera : Tortricidae). Il n'y a pas d'augmentation significative de la mortalité après 72 h. En moins d'une heure après le traitement, 70 % des larves de L. dispar se sont laissées choir ou ont quitté les branches après l'application d'un extrait de 0,2 % de P. nigrum, ce qui indique que ces composés ont un effet répulsif. Soixante-douze h après le traitement, le pipercide et le norpipercide sont plus toxiques pour les larves de L. dispar et de M. disstria que la pipéroléine A et un amide de P. sarmentosum Roxb. lors d'administrations oral...

show abstract

Laboratory and Field Evaluations of Imidacloprid AgainstMelanoplus sanguinipes(Orthoptera: Acrididae) on Small Grains

Cited by 12 publications

References 18 publications

Evaluation of insecticidal and genotoxic effects of imidacloprid and acetochlor in Drosophila melanogaster

Evaluation of insecticidal and genotoxic effects of imidacloprid and acetochlor in Drosophila melanogaster

A sublethal dose of a neonicotinoid insecticide disrupts visual processing and collision avoidance behaviour in Locusta migratoria

Efficacy of Piper nigrum (Piperaceae) extract for control of insect defoliators of forest and ornamental trees

Contact Info

Product

Resources

About