Insecticide-Induced Change in Egg-Laying Strategy of Helopeltis theivora (Hemiptera: Miridae) on Tea Shoot (Camellia sinensis)

Roy, Somnath; Mukhopadhyay, Ananda

doi:10.1007/s12595-011-0010-3

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…This practice is very much useful for reducing the egg load and early nymphal instar populations from the frequent infestation sites. In case of severe infestation, hard plucking, black plucking and level off skiff operations were found to be effective as they deny the food source available to the bug (Roy et al, 2010a;Roy et al, 2015) and minimizes the infestation level for next-generation (Roy and Mukhopadhyay, 2011). Pruning is another best alternative solution for managing TMB, which helps in reducing the population level, further buildup and spread.…”

Section: Cultural Tacticsmentioning

confidence: 99%

Tea Mosquito Bug (Helopeltis spp.): A Pest of Economically Important Fruit and Plantation Crops: Its Status and Management Prospects

E.,

B.,

et al. 2023

planthealth

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The tea mosquito bug (Hemiptera: Miridae) is the recognized pest of fruits and plantations across the world. In India, three species viz. Helopeltis antonii, H. bradyi and H. theivora are dominant among different species and found attacking a wide range of crops. Several alternate host plants of the tea mosquito bug have been recorded, especially in Africa and Asia. The nymphs and adults of the tea mosquito bug suck the sap from leaves, buds and shoots, which results in heavy crop losses. The pest is posing a serious challenge in domestic and overseas trades. For better management decisions, it is very much important to know about pest status, bionomics, distribution, host range, etc. The focus on the management of tea mosquito bug has to emphasize from chemical to traditional, indigenous technical knowledge and integrated pest management using the accessible resources to reduce the resistance development and limit the residual effects. This review highlights the significant works conducted on tea mosquito bug with detailed management strategies. The information on current status, host preference, incidence and early detection of this pest are discussed.

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Section: Cultural Tacticsmentioning

confidence: 99%

Tea Mosquito Bug (Helopeltis spp.): A Pest of Economically Important Fruit and Plantation Crops: Its Status and Management Prospects

E.,

B.,

et al. 2023

planthealth

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“…Reduced leaf tissue penetration by piercing–sucking insects has been shown to function as a resistance mechanism to many different insecticides ( Price 1991 ), because it reduces the insecticide acquisition rate ( Saha and Mukhopadhyay 2013 ). For example, the adult tea mosquito bug Helopeltis theivora (Hemiptera: Miridae) demonstrated avoidance of multiple insecticidal compounds (organochlorine, organophosphates, synthetic pyrethroids, and neonicotinoids; Roy and Mukhopadhyay 2011 , Roy et al 2011 ). When exposed to insecticide-treated plants, the tea mosquito bug also shifts its oviposition behavior away from tea shoots, where the insecticide is believed to have the highest concentration ( Roy and Mukhopadhyay 2011 ).…”

Section: Behavioral Resistance Mechanismsmentioning

confidence: 99%

“…For example, the adult tea mosquito bug Helopeltis theivora (Hemiptera: Miridae) demonstrated avoidance of multiple insecticidal compounds (organochlorine, organophosphates, synthetic pyrethroids, and neonicotinoids; Roy and Mukhopadhyay 2011 , Roy et al 2011 ). When exposed to insecticide-treated plants, the tea mosquito bug also shifts its oviposition behavior away from tea shoots, where the insecticide is believed to have the highest concentration ( Roy and Mukhopadhyay 2011 ). Like the tea mosquito bug, diamondback moth Plutella xylostella L. (Lepidoptera: Plutellidae) populations have exhibited behavioral avoidance through oviposition site selection ( Sarfraz et al 2005 ).…”

Section: Behavioral Resistance Mechanismsmentioning

confidence: 99%

Does Drought Increase the Risk of Insects Developing Behavioral Resistance to Systemic Insecticides?

Khodaverdi¹,

Fowles²,

Bick³

et al. 2016

J Econ Entomol

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Increases in severity and frequency of drought periods, average global temperatures, and more erratic fluctuations in rainfall patterns due to climate change are predicted to have a dramatic impact on agricultural production systems. Insect pest populations in agricultural and horticultural systems are also expected to be impacted, both in terms of their spatial and temporal distributions and in their status as pest species. In this opinion-based article, we discuss how indirect effects of drought may adversely affect the performance of systemic insecticides and also lead to increased risk of insect pests developing behavioral insecticide resistance. We hypothesize that more pronounced drought will decrease uptake and increase the magnitude of nonuniform translocation of systemic insecticides within treated crop plants, and that may have two concurrent consequences: 1) reduced pesticide performance, and 2) increased likelihood of insect pests evolving behavioral insecticide resistance. Under this scenario, pests that can sense and avoid acquisition of lethal dosages of systemic insecticides within crop plants will have a selective advantage. This may lead to selection for insect behavioral avoidance, so that insects predominantly feed and oviposit on portions of crop plants with low concentration of systemic insecticide. Limited research has been published on the effect of environmental variables, including drought, on pesticide performance, but we present and discuss studies that support the hypothesis described above. In addition, we wish to highlight the importance of studying the many ways environmental factors can affect, directly and indirectly, both the performance of insecticides and the risk of target insect pests developing resistance.

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“…Avoidance is the first step in the evolution of behavioural resistance [54]. In H. theivora, this kind of resistance has been seen [55]. H. theivora shows a different egg-laying strategy to avoid insecticide exposure.…”

Section: Behavioural Resistancementioning

confidence: 99%

Biochemical Insecticide Resistance in Tea Pests

Saha¹

2016

Insecticides Resistance

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Polyphagous insect herbivores encounter numerous toxins (xenobiotics) as they pass through their life cycle; some toxins are produced naturally by the host plants (allelochemicals) and others by humans (insecticides) to manage these insects having pest status. The host plants have evolved defensive mechanisms for protection from herbivory, including chemical repellents and toxins (secondary metabolites). Many classes of insect repellents and toxic substances, such as isoflavonoids, furanocoumarins, terpenoids, alkaloids and cyanogenic glycosides are synthesized in plants. The biosynthetic pathways leading to these allelochemicals are continually evolving to generate new secondary metabolites. Similarly, to control the herbivorous insect pests, numerous chemicals of synthetic origin are used continuously against them. In response, the attacking organisms also evolve mechanisms that enable them to resist the defensive chemicals of their hosts and those toxins of synthetic origin applied for their control. A variety of defence mechanisms, including enzymatic detoxification systems, physiological tolerance and behavioural avoidance, protect insect herbivores from these xenobiotic compounds. Insect pests have evolved the mechanisms to degrade metabolically (enzymatically) or otherwise circumvent the toxic effect of many types of chemicals that we have synthesized as modern insecticides. The extent to which insects can metabolize and thereby degrade these antibiotics or toxins is of considerable importance for their survival in hostile chemical environment. These mechanisms continue to evolve as insects attempt to colonize new plant species or encounter newer molecules of synthetic insecticides. Generally, three main enzymes, general esterases (GEs), glutathione Stransferases (GSTs) and cytochrome P450-mediated monooxygenases (CYPs), are involved in the process of metabolic detoxification of insecticides. During the past 70 years, following the discovery and extensive use of synthetic insecticides, resistance of insects to insecticides has registered the greatest increase and strongest impact. The evolution of resistance to insecticides is an example of evolutionary process. An insecticide is the selection pressure, which results in a very strong but differential fitness of the individual in a population having susceptible and resistant genotypes. The survival and subsequent reproduction of resistant individuals lead to a change in the frequency of alleles conferring resistance in the population over

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Insecticide-Induced Change in Egg-Laying Strategy of Helopeltis theivora (Hemiptera: Miridae) on Tea Shoot (Camellia sinensis)

Cited by 6 publications

References 8 publications

Tea Mosquito Bug (Helopeltis spp.): A Pest of Economically Important Fruit and Plantation Crops: Its Status and Management Prospects

Tea Mosquito Bug (Helopeltis spp.): A Pest of Economically Important Fruit and Plantation Crops: Its Status and Management Prospects

Does Drought Increase the Risk of Insects Developing Behavioral Resistance to Systemic Insecticides?

Biochemical Insecticide Resistance in Tea Pests

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