Drielly ferreira - Academia.edu (original) (raw)

Uploads

Papers by Drielly ferreira

Annals of Applied Biology, 2017

Insect-plant interactions involving species of the genus Solanum have been intensively studied, r... more Insect-plant interactions involving species of the genus Solanum have been intensively studied, resulting in several articles on insect-plant interactions. However, the interactions between herbivores and the fruits of Solanum lycopersicum (tomato) are not well known. Neoleucinodes elegantalis is a borer that causes great yield losses in S. lycopersicum crops because of the direct damage that it causes to the fruits and the difficulty of controlling it. In the field, the outside of a tomato fruit infested with the larvae of N. elegantalis is visually similar to uninfested fruits. Even a minor injury by herbivores can elicit a defensive response. Due to the lack of studies on interactions between fruit borers and S. lycopersicum, our aim in this study was to determine the locations of S. lycopersicum fruit in which the N. elegantalis larvae prefer to feed. An evaluation of nutritional sources was done through histochemical and biochemical tests and the defensive response of the S. lycopersicum fruit to attack by N. elegantalis larvae was evaluated through the detection of protease inhibitors (PIs) and lipoxygenase (LOX) activity. Our results show that the columella region is preferred by the N. elegantalis larvae and that this region has a nutritional source. Furthermore, attack by N. elegantalis larvae in the columella does not induce a significant increase in lipoxygenase activity and PIs. Thus, our results provide a better understanding of the interaction between the larvae of N. elegantalis and S. lycopersicum fruits and a better understanding of the evolution of plant-herbivore interactions, with an emphasis on the choice of feeding location as a strategy to avoid plant defences.

Neotropical Entomology, 2017

Neoleucinodes elegantalis (Guenée) (Lepidoptera: Crambidae) is one of the major pests of solanace... more Neoleucinodes elegantalis (Guenée) (Lepidoptera: Crambidae) is one of the major pests of solanaceous plants in South America. It is considered a great threat by the European and Mediterranean Plant Protection Organization due to the serious economic damage that it causes on tomato farms; therefore, controlling this pest is a challenging task in South America. Controlling N. elegantalis at the egg stage is the best way to prevent it from damaging crops; however, thorough studies about the effectiveness of chemicals on the different life stages of this insect pest are lacking. In this study, the effects of different chemical classes were evaluated on N. elegantalis adults, female oviposition behavior, larvae, eggs, and embryonic development. None of the tested insecticides demonstrated toxicity to the adults; however, the results showed that cartap hydrochloride affects oviposition behavior. Moreover, methomyl and cartap hydrochloride exhibited high toxicity against the eggs and larvae, with higher than 80% of mortality. These insecticides interrupted larval hatching and caused alterations in the chorion layer. Flubendiamide and deltamethrin demonstrated toxicity on N. elegantalis larvae; however, lufenuron, indoxacarb, methoxyfenozide, and chlorantraniliprole demonstrated low toxicity on both eggs and larvae, with lower than 70% of mortality. Fruit treated with cartap hydrochloride had a deterrent effect. The ovicidal activity revealed by methomyl and cartap hydrochloride might provide new approaches regarding insecticide effects on eggs. Methomyl, cartap hydrochloride, flubendiamide, and deltamethrin demonstrated toxicity on larvae. The evaluation of the chorion of the eggshell in this study has clarified the toxic effect of methomyl and cartap hydrochloride on eggs.

Journal of Pest Science, 2016

Temperature is one of the main factors affecting insect populations. The models used for studying... more Temperature is one of the main factors affecting insect populations. The models used for studying the effect of temperature on insects are usually based on insect developmental rates. However, life table parameters such as the (intrinsic) population rate of increase (rm), which reflect the overall effect of temperature on the development, reproduction, and survival of the insect, should also be considered. The leaf miner Tuta absoluta (Lepidoptera: Gelechiidae) is an invasive tomato pest across several regions of the world with its range currently expanding because of its spread into the Middle East and Asia. Thus, this study aimed to assess the impact of temperature on T. absoluta and to determine the thermal requirements for this pest based on life table parameters. For this purpose, bioassays of the development and reproduction of T. absoluta under constant temperatures (17, 22, 26, 28, 30, and 33 °C) were performed. The thermal requirements of T. absoluta were assessed from rm. We found that the immature mortality of T. absoluta was lowest at 28 and 30 °C and highest at 17 °C. The optimum temperature for T. absoluta was 30 °C with upper and lower developmental thresholds of 34.6 and 14 °C, respectively. These thermal requirements were different from those that can be estimated from the rate of insect development. The results of this study would be helpful toward developing phenological, spatial, and temporal distribution models for T. absoluta and toward determining optimal management strategies for this pest species.

Neotropical entomology, Jan 6, 2017

The diamondback moth Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae) is an herbiv... more The diamondback moth Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae) is an herbivorous specialist on Brassicaceae species. Brassicas spp. plants developed a range of defenses (chemical, physical, and morphological) to prevent herbivores attack. In this study, we reported the antixenotic and antibiotic effects of outermost layer of two species of epicuticular wax of Brassicaceae, Brassica oleracea L. var. "Santo Antônio," and Hybrid Kope F1 100MX, on larvae and adult of P. xylostella. In the choice experiment, P. xylostella adults showed an oviposition preference for collard cultivars Santo Antônio (control) and Hybrid Kope F1 100MX with wax removal. In the no-choice experiment, oviposition was 6.4 times higher in the Hybrid Kope F1 100MX with wax removal than without wax removal. There were significant differences among larvae feeding on leaf disks of Hybrid Kope F1 100MX in the treatments with (65.3 mg) and without wax removal (23.5 mg). The net reproducti...

Annals of Applied Biology, 2017

Insect-plant interactions involving species of the genus Solanum have been intensively studied, r... more Insect-plant interactions involving species of the genus Solanum have been intensively studied, resulting in several articles on insect-plant interactions. However, the interactions between herbivores and the fruits of Solanum lycopersicum (tomato) are not well known. Neoleucinodes elegantalis is a borer that causes great yield losses in S. lycopersicum crops because of the direct damage that it causes to the fruits and the difficulty of controlling it. In the field, the outside of a tomato fruit infested with the larvae of N. elegantalis is visually similar to uninfested fruits. Even a minor injury by herbivores can elicit a defensive response. Due to the lack of studies on interactions between fruit borers and S. lycopersicum, our aim in this study was to determine the locations of S. lycopersicum fruit in which the N. elegantalis larvae prefer to feed. An evaluation of nutritional sources was done through histochemical and biochemical tests and the defensive response of the S. lycopersicum fruit to attack by N. elegantalis larvae was evaluated through the detection of protease inhibitors (PIs) and lipoxygenase (LOX) activity. Our results show that the columella region is preferred by the N. elegantalis larvae and that this region has a nutritional source. Furthermore, attack by N. elegantalis larvae in the columella does not induce a significant increase in lipoxygenase activity and PIs. Thus, our results provide a better understanding of the interaction between the larvae of N. elegantalis and S. lycopersicum fruits and a better understanding of the evolution of plant-herbivore interactions, with an emphasis on the choice of feeding location as a strategy to avoid plant defences.

Neotropical Entomology, 2017

Neoleucinodes elegantalis (Guenée) (Lepidoptera: Crambidae) is one of the major pests of solanace... more Neoleucinodes elegantalis (Guenée) (Lepidoptera: Crambidae) is one of the major pests of solanaceous plants in South America. It is considered a great threat by the European and Mediterranean Plant Protection Organization due to the serious economic damage that it causes on tomato farms; therefore, controlling this pest is a challenging task in South America. Controlling N. elegantalis at the egg stage is the best way to prevent it from damaging crops; however, thorough studies about the effectiveness of chemicals on the different life stages of this insect pest are lacking. In this study, the effects of different chemical classes were evaluated on N. elegantalis adults, female oviposition behavior, larvae, eggs, and embryonic development. None of the tested insecticides demonstrated toxicity to the adults; however, the results showed that cartap hydrochloride affects oviposition behavior. Moreover, methomyl and cartap hydrochloride exhibited high toxicity against the eggs and larvae, with higher than 80% of mortality. These insecticides interrupted larval hatching and caused alterations in the chorion layer. Flubendiamide and deltamethrin demonstrated toxicity on N. elegantalis larvae; however, lufenuron, indoxacarb, methoxyfenozide, and chlorantraniliprole demonstrated low toxicity on both eggs and larvae, with lower than 70% of mortality. Fruit treated with cartap hydrochloride had a deterrent effect. The ovicidal activity revealed by methomyl and cartap hydrochloride might provide new approaches regarding insecticide effects on eggs. Methomyl, cartap hydrochloride, flubendiamide, and deltamethrin demonstrated toxicity on larvae. The evaluation of the chorion of the eggshell in this study has clarified the toxic effect of methomyl and cartap hydrochloride on eggs.

Journal of Pest Science, 2016

Temperature is one of the main factors affecting insect populations. The models used for studying... more Temperature is one of the main factors affecting insect populations. The models used for studying the effect of temperature on insects are usually based on insect developmental rates. However, life table parameters such as the (intrinsic) population rate of increase (rm), which reflect the overall effect of temperature on the development, reproduction, and survival of the insect, should also be considered. The leaf miner Tuta absoluta (Lepidoptera: Gelechiidae) is an invasive tomato pest across several regions of the world with its range currently expanding because of its spread into the Middle East and Asia. Thus, this study aimed to assess the impact of temperature on T. absoluta and to determine the thermal requirements for this pest based on life table parameters. For this purpose, bioassays of the development and reproduction of T. absoluta under constant temperatures (17, 22, 26, 28, 30, and 33 °C) were performed. The thermal requirements of T. absoluta were assessed from rm. We found that the immature mortality of T. absoluta was lowest at 28 and 30 °C and highest at 17 °C. The optimum temperature for T. absoluta was 30 °C with upper and lower developmental thresholds of 34.6 and 14 °C, respectively. These thermal requirements were different from those that can be estimated from the rate of insect development. The results of this study would be helpful toward developing phenological, spatial, and temporal distribution models for T. absoluta and toward determining optimal management strategies for this pest species.

Neotropical entomology, Jan 6, 2017

The diamondback moth Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae) is an herbiv... more The diamondback moth Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae) is an herbivorous specialist on Brassicaceae species. Brassicas spp. plants developed a range of defenses (chemical, physical, and morphological) to prevent herbivores attack. In this study, we reported the antixenotic and antibiotic effects of outermost layer of two species of epicuticular wax of Brassicaceae, Brassica oleracea L. var. "Santo Antônio," and Hybrid Kope F1 100MX, on larvae and adult of P. xylostella. In the choice experiment, P. xylostella adults showed an oviposition preference for collard cultivars Santo Antônio (control) and Hybrid Kope F1 100MX with wax removal. In the no-choice experiment, oviposition was 6.4 times higher in the Hybrid Kope F1 100MX with wax removal than without wax removal. There were significant differences among larvae feeding on leaf disks of Hybrid Kope F1 100MX in the treatments with (65.3 mg) and without wax removal (23.5 mg). The net reproducti...