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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Trophic ecology of citrus pests based on stable isotope analysis

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de Santi-Junior, Adelino [1] ; Botteon, Victor Wilson [1] ; Mastrangelo, Thiago [1] ; Moreira, Marcelo Zacharias [1]
Total Authors: 4
[1] Univ Sao Paulo, CENA, Av Centenario 303, BR-13416000 Piracicaba, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Scientia Agricola; v. 75, n. 6, p. 504-508, NOV-DEC 2018.
Web of Science Citations: 0

Macrodactylus pumilio Burm. (Coleoptera: Scarabeidae) and Naupactus cervinus (Boh.) (Coleoptera: Curculionidae) are considered primary pests in citrus crops in Brazil, causing damage to plants and decreasing productivity. However, few studies investigate the ecology of these insects. In this context, the use of stable isotopes analysis (SIA) emerges as an alternative technique to conventional studies of behavioral ecology because it is faster and may explain feeding behavior based on the food source for each species. Field sampling and laboratory experiments were carried out to examine the changes of carbon and nitrogen stable isotope ratios (delta C-13 and delta N-15) among pests and host plants (C-3 citrus and C-4 grasses), providing means to examine trophic interactions. Beetles were collected at the municipality of Gaviao Peixoto, Sao Paulo State, identified and kept at 5 degrees C in saturated saline solution until the SIA. Two patterns for both species were found: delta C-13 value for N. cervinus was -23.6 parts per thousand and -13 parts per thousand for M. pumilio, indicating similarity between the results of delta C-13 of N. cervinus and citrus plants (-26 parts per thousand) and dependence on grasses (-12 parts per thousand) for M. pumilio individuals. The mean delta N-15 value was 4.3 and 5.8 parts per thousand for citrus plants and grass leaves, respectively, and the mean delta N-15 value was 4.456 for N. cervinus and 4.9 parts per thousand for M. pumilio. The results showed a higher affinity of N. cervinus for citrus roots since the larval stage compared with the alternative diet on M. pumilio. (AU)

FAPESP's process: 09/12265-3 - Analysis of the feeding ecology of spiders(Araneae) through the variation in the natural abundance of stable isotopes at citrus orchards in the municipality of Gavião Peixoto - SP.
Grantee:Adelino de Santi Júnior
Support type: Scholarships in Brazil - Master