Emerging insect pests in Indian agriculture

Rathee, Mandeep; Dalal, Pradeep Kumar

doi:10.5958/0974-8172.2018.00043.3

Cited by 27 publications

(12 citation statements)

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“…Aphids, whiteflies and planthoppers are important pests in agricultural production wileyonlinelibrary.com/journal/ps and they occupy an important position and proportion of worldwide agricultural pests. 18,57,58 The CSP2 homologous genes of these insects are involved in both the dual functions of ROS inhibition 53 and olfactory recognition, allowing them to rapidly adapt to varying environmental factors and break through the defenses of the host plant. This partly explains the large number of outbreaks of these kinds of insects in agricultural production.…”

Section: Discussionmentioning

confidence: 99%

Functional and evolutionary characterization of chemosensory protein CSP2 in the whitefly, Bemisia tabaci

Li¹,

Dewer

Du³

et al. 2020

Pest Management Science

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BACKGROUND: Chemosensory proteins (CSPs) are thought to play essential roles in insect chemical communication, but their exact physiological functions remain unclear. RESULTS: In this study, we investigated the functions of the CSP2 gene in the whitefly Bemisia tabaci using protein expression and the binding affinity spectrum of CSP2 to different types of odor molecules. Moreover, the evolutionary characteristics of the CSP2 gene were studied. The data obtained using binding assay showed that the CSP2 protein can bind to a broad range of plant volatiles including the homoterpene (E)-3,8-dimethyl-1,4,7-nonatriene (DMNT) and its analogs. In addition, using a behavioral experimental approach we identified that DMNT can repel the selection and oviposition of B. tabaci. Furthermore, protein structure modeling, molecular docking analyses and a functional mutation experiment were carried out resulting in the final identification of key amino acid residue Y11, which displayed important roles in the binding of CSP2 to DMNT. The results also showed that Y11 is located in the pocket region where CSP2 has a pi-alkyl interaction with DMNT. Meanwhile, comparative and evolutionary analyses indicated that CSP2 shared a high sequence similarity with CSPs of other insect family members such as Sternorrhyncha and Auchenorrhyncha including aphids, whiteflies and planthoppers. CONCLUSION: These results suggested that CSP2 likely contributes to mediating responses of B. tabaci to plant volatiles, which may play a pivotal role in its feeding and oviposition preferences. Moreover, these findings could provide key information for exploring efficiency monitoring and integrated pest management strategies of B. tabaci.

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Section: Discussionmentioning

confidence: 99%

Functional and evolutionary characterization of chemosensory protein CSP2 in the whitefly, Bemisia tabaci

Li¹,

Dewer

Du³

et al. 2020

Pest Management Science

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“…2017 ; Bana et al. 2018 ; Rathee and Dalal 2018 ). Nevertheless, due to their pestiferous nature and high invasion potentiality, the Scirtothrips species are becoming a severe quarantine concern in several countries including India (Mound and Palmer 1981 ; Nakahara 1997 ; Morse and Hoddle 2006 ).…”

Section: Introductionmentioning

confidence: 99%

“…Species under this genus are recorded as major pest worldwide like, Scirtothrips aurantii on citrus in South Africa and on bananas in Yemen; Scirtothrips bispinosus on tea in India; Scirtothrips citri on citrus in California; Scirtothrips dorsalis on ground-nuts in India, on tea in Japan, and on strawberries in Queensland; Scirtothrips inermis on citrus in New Zealand; Scirtothrips kenyensis on tea in India and Kenya; Scirtothrips longipennis on glasshouses; Scirtothrips mangiferae on mango in India, Egypt, and Israel; Scirtothrips manihoti on cassava in Brazil; Scirtothrips oligochaetus on cotton in India (Mound and Palmer 1981). In last decade, the Scirtothrips species were causes billion of damages in both Indian agriculture and horticulture crops (Sithanantham et al 2007;Samota et al 2017;Bana et al 2018;Rathee and Dalal 2018). Nevertheless, due to their pestiferous nature and high invasion potentiality, the Scirtothrips species are becoming a severe quarantine concern in several countries including India (Mound and Palmer 1981;Nakahara 1997;Morse and Hoddle 2006).…”

Section: Introductionmentioning

confidence: 99%

DNA barcoding of selected Scirtothrips species (Thysanoptera) from India

Chakraborty

Singha

Kumar

et al. 2019

Mitochondrial DNA Part B

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The members of the genus Scirtothrips are highly polyphagous, including major pest and vector species. We applied both morphology and molecular approaches to delimit the selected Scirtothrips species from India. Out of 43 generated barcode sequences, six sequences of three species (S. hitam, S. mangiferae, and S. malayensis) are the novel contribution in global database. The Bayesian (BA) phylogeny clearly distinguishes all the studied species with reciprocal monophyletic criteria and represents multiple clades in S. dorsalis and S. oligochaetus. The high Kimura-2-Parameter (K2P) genetic divergences were observed between the multiple clades of S. dorsalis (4.5-8.8%) and S. oligochaetus (6.4%), which indicating possible existence of cryptic diversity. The current study also provided the morphological keys for six Scirtothrips species including S. hitam as a new record to India.

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“…Approximately 15–20% of global agricultural yield is usurped by insects due to injudicious use of chemical insecticides, climate change and introduction of input‐intensive high‐yielding varieties . In the Indian subcontinent as well as in Asia, polyphagous lepidopteran pests such as Helicoverpa armigera , Spodopera litura , S. exigua etc.…”

Section: Introductionmentioning

confidence: 99%

Txp40, a protein from Photorhabdus akhurstii, conferred potent insecticidal activity against the larvae of Helicoverpa armigera, Spodoptera litura and S. exigua

Shankhu

Mathur

Mandal

et al. 2020

Pest Management Science

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BACKGROUND: Txp40, a 37 kDa protein, previously characterized from the Gram-negative bacterium Photorhabdus akhurstii (symbiotically associates with insect-parasitic nematode, Heterorhabditis indica), conferred insecticidal activity against Galleria mellonella. Here, the biological activity of Txp40 was evaluated against economically important insects, including Helicoverpa armigera, Spodoptera litura and S. exigua.RESULTS: When both intra-hemocoel injected and orally fed to test insects, comparatively greater oral LD 50 (187.7-522 ng g −1 ) than injection LD 50 (32.33-150.6 ng g −1 ) was obtained with Txp40 derived from P. akhurstii strain IARI-SGMG3

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Emerging insect pests in Indian agriculture

Cited by 27 publications

References 0 publications

Functional and evolutionary characterization of chemosensory protein CSP2 in the whitefly, Bemisia tabaci

Functional and evolutionary characterization of chemosensory protein CSP2 in the whitefly, Bemisia tabaci

DNA barcoding of selected Scirtothrips species (Thysanoptera) from India

Txp40, a protein from Photorhabdus akhurstii, conferred potent insecticidal activity against the larvae of Helicoverpa armigera, Spodoptera litura and S. exigua

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