Associação entre teor de nitrogênio em cultivares de arroz e ataque de Oryzophagus oryzae (Costa Lima) (Coleoptera: Curculionidae)

Cunha, Uemerson Silva da; Carbonari, Jairo J.; Vendramim, José Djair; Martins, José Francisco da Silva

doi:10.1590/s0103-84782006000600002

Cited by 3 publications

(2 citation statements)

References 7 publications

(5 reference statements)

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“…The concentration of soluble nitrogen varies among plant tissues, being higher in structures such as flowers, pollen and leaves, than in the xylem and phloem. Since nitrogen content may indicate plants with higher nutritional quality for herbivores ( Eubanks, Styrsky & Denno, 2003 ), plant structures with high nitrogen levels may attract a greater diversity of insects ( Cunha et al, 2006 ).…”

Section: Introductionmentioning

confidence: 99%

Changes in leaf chlorophyll content associated with flowering and its role in the diversity of phytophagous insects in a tree species from a semiarid Caatinga

Sousa-Souto

Bocchiglieri

Dias

et al. 2018

PeerJ

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Phytophagous insects choose their feeding resources according to their own requirements, but their feeding preferences in the semiarid Caatinga have rarely been studied. Flowering trees leads to a greater diversity of flower visitors and their predators in the host plant, but little is known about why the diversity of phytophagous insects not associated with flowers is also increased. The purpose of this study was to evaluate the diversity of sap-sucking, wood-boring and leaf-chewing insects associated with leaf chlorophyll content in flowering and non-flowering plants of Poincianella pyramidalis, an endemic tree of Caatinga. We used a leaf chlorophyll index (LCI) as a surrogate for resource quality, and an entomological umbrella to collect phytophagous insects. We show that trees which bloomed demonstrated higher chlorophyll content, greater abundance and a significant difference in the composition of phytophagous insect species when compared to non-flowering trees (p < 0.05). The results suggest that not only the presence of flowers themselves, but also the higher nutritional quality of leaf tissue, can explain the differences in species diversity and abundance of phytophagous insects. Exceptional flowering trees in the Caatinga area studied may thus act as spots of high quality resources, favouring changes in the diversity of insects in this environment.

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Section: Introductionmentioning

confidence: 99%

Changes in leaf chlorophyll content associated with flowering and its role in the diversity of phytophagous insects in a tree species from a semiarid Caatinga

Sousa-Souto

Bocchiglieri

Dias

et al. 2018

PeerJ

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“…This result corroborates the findings of Fageria and Santos (2008), who stated that increased NPP resulted in increased GY. The results from conventional production systems have shown that decreases in productivity components and grain yield of common bean are related to competition from weeds and, the occurrence of diseases, and/or insect attacks (Garcia et al, 2007; Cunha et al, 2006; Salgado et al, 2007). In organic production systems, these problems may be more pronounced because the use of agrochemicals is not allowed, which makes it difficult to control weeds, insects, and diseases.…”

Section: Discussionmentioning

confidence: 99%

Green Manure Species and Sowing Time Effects on the Agronomic Performance of Common Bean

2013

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An evaluation of sowing date effects on the development of green manure species and the subsequent effects on the agronomic performance of common bean (Phaseolus vulgaris L.) was conducted using three consecutive years of field trials. A randomized block design was used with a factorial treatment structure of 3 yr, three sowing dates and five green manure species {sunn hemp [Crotalaria juncea L.], slender leaf rattlebox [C. ochroleuca G. Don], velvet bean[Mucuna pruriens L.], pigeon pea [Cajanus cajan (L.) Millsp.], and jack bean [Canavalia ensiformis (L.) DC.]}, aiming to determine the agronomical performance of common bean in response to species and sowing date of different green manures. The dependent variables used to evaluate green manure development were "green manure shoot dry mass (GMSDM), green manure N accumulation (GMNA) and green manure nitrogen accumulation efficiency (GMNAE)". For common bean "common bean leaf area index (CBLAI), common bean shoot dry mass (CBSDM), number of pods per plant (NPP), number of grains per pod (NGP), total of grains per plant (TGP), 100-grain weight (100GW), grain yield (GY), grain harvest index (GHI), and nitrogen use efficiency (NUE)" were used to evaluate common bean performance. The GMSDM and GMNA both decreased when the green manure were sown in February rather than November, with the exception of velvet bean. Although the GMNA varied with year, species, and planting date, values above 90 kg ha -1 were common after November and December sowing and were sufficient to ensure good GY levels of subsequent common bean. Pigeon pea stood out because of its positive effect on the CBLAI, CBSDM, and NUE values of subsequent common bean. The GMNAE, NPP, NGP, NUE, and GHI were significantly correlated with GY. The best combination of these variables resulted in a common bean GY of 2000 kg ha -1 , which is 57% higher than the Brazilian average. These results indicate that the use of green manure can contribute to the sustainability of organic production systems in tropical regions.

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Field Assessment of Oryzophagus oryzae (Coleoptera: Curculionidae) Preference and Performance on Selected Rice Cultivars

Pazini

Grützmacher

Seidel

et al. 2022

Journal of Economic Entomology

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Plant resistance is a key strategy for the management of Oryzophagus oryzae (Costa Lima) (Coleoptera: Curculionidae), an important pest in South American rice paddies. The present study investigated the resistance of rice cultivars in terms of feeding and oviposition preference, growth, development, and biological performance of O. oryzae under natural conditions of field infestation during two consecutive rice seasons. There were no effects of the six cultivars on the feeding and oviposition preferences of O. oryzae as evaluated 5, 8, and 11 d After Flooding (DAF) of the plots, indicating the absence of antixenosis. Cultivars did not differ in terms of egg viability and larval density of first instars on the roots at 15 DAF. Significant differences were found 25 and 35 DAF when larval density per sample was high on ‘BRS Pampa CL’ (up to 24.5), intermediate on ‘BRS Querência’ and ‘BRS Ligeirinho’ (up to 16.1), and low on ‘BRS Atalanta’, ‘BRS Firmeza’, and ‘Dawn’ (up to 8.8). The cultivars ‘BRS Atalanta’, ‘BRS Firmeza’, and ‘Dawn’ caused malnutrition and inhibition of larval growth. These effects, typical of antibiosis, resulted in delayed pupation and emergence of adults; in addition, emerged females had body weight decreased strongly. The cultivars BRS Pampa CL, BRS Querência, and BRS Ligeirinho are susceptible, resulting in high larval populations and more suitable development of O. oryzae; antibiosis, as indicated for ‘BRS Atalanta’, ‘BRS Firmeza’, and ‘Dawn’, probably is the key mechanism of rice resistance to O. oryzae.

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Associação entre teor de nitrogênio em cultivares de arroz e ataque de Oryzophagus oryzae (Costa Lima) (Coleoptera: Curculionidae)

Abstract: RESUMO O gorgulho-aquático-do-arroz Oryzophagus oryzae (Costa Lima) (Coleoptera: Curculionidae) é um dos insetos mais prejudiciais à cultura do arroz irrigado, devido aos danos causados pelas suas larvas às raízes

Cited by 3 publications

References 7 publications

Changes in leaf chlorophyll content associated with flowering and its role in the diversity of phytophagous insects in a tree species from a semiarid Caatinga

Changes in leaf chlorophyll content associated with flowering and its role in the diversity of phytophagous insects in a tree species from a semiarid Caatinga

Green Manure Species and Sowing Time Effects on the Agronomic Performance of Common Bean

Field Assessment of Oryzophagus oryzae (Coleoptera: Curculionidae) Preference and Performance on Selected Rice Cultivars

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