Article
Environmental Sciences
Li Li, Hongwu Liang, Wei Pan, Shijie Yin, Junli Cao, Jindong Li
Summary: This study evaluated the residue behaviors of Thiamethoxam (TMX) applied through root irrigation in tomato plants. TMX was found to be transferable within the plant and its degradation product, clothianidin (CLO), was detected in the leaves. The concentrations of CLO were even higher than those of TMX. The results highlight the potential of TMX application through root irrigation in the tomato system from a dietary safety perspective.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Entomology
Gabriele Rondoni, Alessandro Roman, Camille Meslin, Nicolas Montagne, Eric Conti, Emmanuelle Jacquin-Joly
Summary: Limited knowledge exists regarding the mechanisms underlying the sense of smell and taste in the predatory harlequin ladybird Harmonia axyridis. This study describes the first chemosensory gene repertoire expressed in the antennae of male and female H. axyridis, paving the way for future studies aiming at increasing the efficacy of biological control or reducing its populations in invasive areas.
Article
Environmental Sciences
C. T. D. Godoi, S. O. Campos, S. H. Monteiro, C. P. Ronchi, A. A. Silva, R. N. C. Guedes
Summary: Despite the environmental concerns, neonicotinoid insecticides remain the most widely used group of insecticides due to their reported insecticidal efficacy and potential plant bioactivation. However, the potential double benefit and interconnection with neonicotinoids have been little explored, particularly considering the whole plant phenology. This study found that neonicotinoid application on soybean seeds showed hormesis effect on certain parameters of the plants, but did not show evidence of cascading plant-mediated hormesis to the whiteflies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Travis S. Schmidt, Janet L. Miller, Barbara J. Mahler, Peter C. Van Metre, Lisa H. Nowell, Mark W. Sandstrom, Daren M. Carlisle, Patrick W. Moran, Paul M. Bradley
Summary: Neonicotinoid mixtures are commonly found in streams worldwide, but their ecological impacts are not well understood. This study shows that exposure to neonicotinoids above certain thresholds can lead to a loss in taxa abundance and richness, disrupted adult emergence, and altered trophodynamics. The presence of neonicotinoid mixtures in California streams also poses greater than expected risks to stream health.
Article
Entomology
Ning Di, Kai Zhang, Qingxuan Xu, Fan Zhang, James D. Harwood, Su Wang, Nicolas Desneux
Summary: The invasive pest Spodoptera frugiperda poses a major threat to agriculture in China. Experimental results suggest that Orius sauteri and Harmonia axyridis have the potential to control this pest through predation.
Article
Environmental Sciences
Elton Luiz Scudeler, Shelly Favorito de Carvalho, Ana Silvia Gimenes Garcia, Marilucia Santorum, Carlos Roberto Padovani, Daniela Carvalho dos Santos
Summary: This study used morphological tools to investigate the effects of pyriproxyfen on the midgut and fat body of the predator Ceraeochrysa claveri. The results showed that chronic exposure to pyriproxyfen led to increased development time, mortality, and histopathological alterations in both organs. The exposure also induced oxidative stress and cytoprotective responses. This study demonstrates the applicability and sensitivity of morphological analysis for evaluating the effects of insecticides on non-target organisms.
ENVIRONMENTAL POLLUTION
(2022)
Article
Entomology
Milos Sevarika, Gabriele Rondoni, Eric Conti, Roberto Romani
Summary: The invasive beetle species Harmonia axyridis, originally from Asia, has been released worldwide for biological control of herbivorous insects, but has become a threat to native predatory species due to its ability to reduce their populations. Surprisingly, despite extensive literature on the species, the sensory organs of its antennae have been poorly characterized. Studies using scanning and transmission electron microscopy techniques revealed the presence of various types of sensilla and antennal glands in both male and female individuals, with no sexual dimorphism observed in their overall structure or sensory features.
ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
(2021)
Article
Entomology
Severin Hatt, Naoya Osawa
Summary: The type of diet readily available after adult eclosion does not significantly affect the future fecundity of adult ladybird beetles, as long as they find prey within a few days. High variability in pre-oviposition time was observed among females, and significant negative relationships were found between pre-oviposition time and both the number of eggs oviposited daily and the viability of egg batches.
Article
Entomology
Xing-Lin Yu, Yi Feng, Tong-Xian Liu, Bao-Li Qiu
Summary: Under laboratory conditions, the effects of predator cues and temperature on the behavior of Aphidius gifuensis were investigated. The study found that the presence of predator cues did not significantly affect the behavior of A. gifuensis, but led to a decrease in offspring production. However, increasing temperatures resulted in an increase in behavior frequency and larval numbers of A. gifuensis. Therefore, both temperature and predator cues should be considered in aphid management practices.
JOURNAL OF ASIA-PACIFIC ENTOMOLOGY
(2023)
Article
Agronomy
Isabella Maria Pompeu Monteiro Padial, Silvana Aparecida de Souza, Jose Bruno Malaquias, Claudia Andrea Lima Cardoso, Jessica Karina da Silva Pachu, Claudemir Antonio Garcia Fioratti, Rosilda Mara Mussury
Summary: This study evaluated the bioactivity, feeding preference, and oviposition preference of Miconia albicans botanical extracts against Plutella xylostella. The extracts showed potential for pest control with their larvicidal and repellent effects on the pest.
Article
Entomology
Binita Shrestha, Freddy Ibanez, Lukasz L. Stelinski
Summary: This study investigates the interaction between the citrus greening disease pathogen, Candidatus Liberibacter asiaticus (CLas), and its vector, the Asian citrus psyllid (Diaphorina citri), and how it affects the lady beetle predator, Harmonia axyridis. The results show that CLas indirectly reduces the fitness of the lady beetle by diminishing their fecundity and fertility. The lady beetles, however, do not distinguish between infected and uninfected psyllids. The authors suggest that biological control of D. citri may benefit from provisioning the ladybeetle predators with alternative hosts or augmentative releases of laboratory-reared predators under conditions of high HLB infection.
PHYSIOLOGICAL ENTOMOLOGY
(2023)
Article
Environmental Sciences
Narayanan Shyam-Sundar, Haridoss Sivanesh, Sengodan Karthi, Annamalai Thanigaivel, Vethamonickam Stanley-Raja, Kanagaraj Muthu-Pandian Chanthini, Ramakrishnan Ramasubramanian, Kilapavoor Raman Narayanan, Sengottayan Senthil-Nathan
Summary: The study demonstrated that the chloroform extract from Desmostachya bipinnata showed effective bio-pesticidal activity against Spodoptera litura, an important agricultural pest.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Entomology
Tatsumi Kudo, Eisuke Hasegawa
Summary: Predation is a strong selection pressure on prey, leading them to evolve a variety of anti-predator behaviors such as death-feigning. Previous studies have shown that the duration and frequency of death-feigning in prey can be influenced by temperature, and body color may play a role in thermal adaptation. In the case of the ladybug Harmonia axyridis, the duration of death-feigning is positively correlated with temperature in the black with red spots type and negatively correlated with temperature in the red with black spots type.
JOURNAL OF INSECT BEHAVIOR
(2022)
Article
Environmental Sciences
Rui Zhao, Huan-Huan Wang, Jie Gao, Yong-Jun Zhang, Xianchun Li, Jing-Jiang Zhou, Pei Liang, Xi-Wu Gao, Shao-Hua Gu
Summary: Recent studies have shown that methyl benzoate (MB) is highly toxic to the agricultural pest, fall armyworm Spodoptera frugiperda, while exhibiting no toxic effects on non-target organisms. MB has comparable toxicities to the commercial pesticide lambda-cyhalothrin against S. frugiperda larvae and adults, with a repellency rate of 56.72 % and oviposition deterrence rate of 69.40 %. Furthermore, MB does not pose toxic effects on natural predators and non-target animals at lethal concentrations. Therefore, MB is considered a safe and effective botanical pesticide against S. frugiperda.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Environmental Sciences
Yi Chen, Jorg Romeis, Michael Meissle
Summary: The study found adverse effects of stacked Bt maize flour on the water flea Daphnia magna, but not for leaves or pollen; leaves had a higher content of Cry protein than flour, suggesting that the effects of flour may not be caused by Cry proteins; the observed effects of Bt maize flour were unlikely to be biologically relevant, considering the natural range of variation in the response of D. magna to conventional maize lines.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)