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Magalhães DM, Da Silva ITFA, Borges M, Laumann RA, Blassioli-Moraes MC. Anthonomus grandis aggregation pheromone induces cotton indirect defence and attracts the parasitic wasp Bracon vulgaris. J Exp Bot 2019; 70:1891-1901. [PMID: 30722044 DOI: 10.1093/jxb/erz040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 01/21/2019] [Indexed: 06/09/2023]
Abstract
Insect-derived volatiles seem to provide reliable chemical cues that plants could employ to defend themselves. Here we investigated the effect of pheromone emission from a closely associated (Anthonomus grandis; boll weevil) and an unassociated (Tibraca limbativentris) herbivore on cotton volatile emission. Exposure to A. grandis aggregation pheromone induced cotton defence response by enhancing the emission of volatiles attractive to the natural enemy of A. grandis, the parasitic wasp Bracon vulgaris, but only when the pheromonal blend was complete (all four components). Individual components of A. grandis aggregation pheromone were not able to induce cotton plants to increase the release of volatiles. On the other hand, T. limbativentris sex pheromone did not induce any change in the cotton constitutive volatile profile. Our results support the hypothesis that plants are able to detect pheromones of tightly co-evolved herbivores. Moreover, A. grandis pheromone exposure induced similar volatile compounds to herbivore-induced cotton, such as linalool, (E)-ocimene, (E)-4,8-dimethylnona-1,3,7-triene (DMNT), and (E,E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene (TMTT). We also showed that the larval ectoparasitoid B. vulgaris relies on boll weevil's aggregation pheromone and pheromone-induced plant volatiles as kairomones to locate suitable hosts.
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Affiliation(s)
- Diego Martins Magalhães
- Department of Zoology, Institute of Biological Sciences, University of Brasília, Brasília-DF, Brazil
- Department of Biological Control, EMBRAPA Genetic Resources and Biotechnology, Brasília-DF, Brazil
| | - Izabela Thaís Fidelis Alves Da Silva
- Department of Biological Control, EMBRAPA Genetic Resources and Biotechnology, Brasília-DF, Brazil
- Department of Plant and Environmental Science, Centre for Agricultural Science, Federal University of Paraíba, Areia-PB, Brazil
| | - Miguel Borges
- Department of Biological Control, EMBRAPA Genetic Resources and Biotechnology, Brasília-DF, Brazil
| | - Raúl Alberto Laumann
- Department of Biological Control, EMBRAPA Genetic Resources and Biotechnology, Brasília-DF, Brazil
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Grigolli JFJ, Souza LA, Mota TA, Fernandes MG, Busoli AC. Sequential Sampling Plan of Anthonomus grandis (Coleoptera: Curculionidae) in Cotton Plants. J Econ Entomol 2017; 110:763-769. [PMID: 28334212 DOI: 10.1093/jee/tox036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Indexed: 06/06/2023]
Abstract
The boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), is one of the most important pests of cotton production worldwide. The objective of this work was to develop a sequential sampling plan for the boll weevil. The studies were conducted in Maracaju, MS, Brazil, in two seasons with cotton cultivar FM 993. A 10,000-m2 area of cotton was subdivided into 100 of 10- by 10-m plots, and five plants per plot were evaluated weekly, recording the number of squares with feeding + oviposition punctures of A. grandis in each plant. A sequential sampling plan by the maximum likelihood ratio test was developed, using a 10% threshold level of squares attacked. A 5% security level was adopted for the elaboration of the sequential sampling plan. The type I and type II error used was 0.05, recommended for studies with insects. The adjustment of the frequency distributions used were divided into two phases, so that the model that best fit to the data was the negative binomial distribution up to 85 DAE (Phase I), and from there the best fit was Poisson distribution (Phase II). The equations that define the decision-making for Phase I are S0 = -5.1743 + 0.5730N and S1 = 5.1743 + 0.5730N, and for the Phase II are S0 = -4.2479 + 0.5771N and S1 = 4.2479 + 0.5771N. The sequential sampling plan developed indicated the maximum number of sample units expected for decision-making is ∼39 and 31 samples for Phases I and II, respectively.
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Affiliation(s)
| | - L A Souza
- São Paulo State University (FCAV/UNESP), Via de Acesso Prof. Paulo Donato Castellane, s/n, Jaboticabal, SP 14884-900, Brazil (; )
| | - T A Mota
- Embrapa Agropecuária Oeste, CP 449, Dourados, MS 79804-970, Brazil
| | - M G Fernandes
- Federal University of Grande Dourados (FCBA/UFGD), CP 533, Dourados, MS 79804-970, Brazil
| | - A C Busoli
- São Paulo State University (FCAV/UNESP), Via de Acesso Prof. Paulo Donato Castellane, s/n, Jaboticabal, SP 14884-900, Brazil (; )
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Costa HN, da Cunha FM, Cruz GS, D'assunção CG, Rolim GG, Barros MEG, Breda MO, Teixeira AAC, Teixeira VW. Lufenuron impact upon Anthonomus grandis Boheman (Coleoptera: Curculionidae) midgut and its reflection in gametogenesis. Pestic Biochem Physiol 2017; 137:71-80. [PMID: 28364806 DOI: 10.1016/j.pestbp.2016.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 09/29/2016] [Accepted: 10/08/2016] [Indexed: 06/07/2023]
Abstract
The insecticide Match® (lufenuron), one of the main insect growth regulators used in pest control, has been presented as a viable alternative against the boll weevil, Anthonomus grandis (Coleoptera: Curculionidae), by inhibiting chitin synthesis. Thus, this study aimed to examine whether Match® interferes in the synthesis of the peritrophic matrix, leading to changes in the midgut epithelium, resulting in nutritional deficiency and reflecting, thereby, in the gametogenesis process of A. grandis. Floral cotton buds were immersed in the insecticide solution (800μL of Match®+200mL of distilled water) and offered to the adult insects. The midguts of the insects were evaluated after 24 and 120h after feeding. The gonads were evaluated after 120h. The results showed that Match®, in both evaluation periods, induced histopathological alterations such as disorganization, vacuolization and desquamation of the midgut epithelium; histochemical modifications in the distribution patterns of carbohydrates, although without quantitative changes; and a strong decrease in protein levels. No apoptosis were observed, however, there was an increase in the number of regenerative cell nests. In the testicles, a reduction in the amount of spermatozoids and reduced carbohydrate levels were observed, but no difference in protein levels. The ovarioles presented structural disorganization of follicular cells, yolk reduction and decrease in protein levels, however, no change in carbohydrates levels was noted. Therefore, it is concluded that Match® performs histopathologic and histochemical alterations in the midgut epithelium and the gonads of A. grandis adults, reflecting in the gametogenesis process, presenting itself as a promising tool in the management of this pest on cotton crops.
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Affiliation(s)
- Hilton Nobre Costa
- Federal Rural University of Pernambuco, Department of Agronomy- Entomology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900 Recife, PE, Brazil
| | - Franklin Magliano da Cunha
- Frassineti School of Recife, Department of Biology, Conde da Boa Vista Avenue, 50060-002 Recife, PE, Brazil
| | - Glaucilane Santos Cruz
- Federal Rural University of Pernambuco, Department of Agronomy- Entomology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900 Recife, PE, Brazil.
| | - Carolline Guimarães D'assunção
- Federal Rural University of Pernambuco, Department of Animal Morphology and Physiology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900 Recife, PE, Brazil
| | - Guilherme Gomes Rolim
- Federal Rural University of Pernambuco, Department of Agronomy- Entomology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900 Recife, PE, Brazil
| | - Maria Edna Gomes Barros
- Federal Rural University of Pernambuco, Department of Animal Morphology and Physiology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900 Recife, PE, Brazil
| | - Mariana Oliveira Breda
- Federal Rural University of Pernambuco, Department of Agronomy- Entomology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900 Recife, PE, Brazil
| | - Alvaro Aguiar Coelho Teixeira
- Federal Rural University of Pernambuco, Department of Animal Morphology and Physiology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900 Recife, PE, Brazil
| | - Valéria Wanderley Teixeira
- Federal Rural University of Pernambuco, Department of Animal Morphology and Physiology, Dom Manoel de Medeiros Ave., Dois Irmãos, 52171-900 Recife, PE, Brazil
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