Effects of three chitin synthesis inhibitors on egg masses, nymphs and adults of Halyomorpha halys (Hemiptera: Pentatomidae)

Pest Management Science, Journal Year: 2023, Volume and Issue: 79(8), P. 2882 - 2890

Published: March 21, 2023

Halyomorpha halys, (brown marmorated stink bug, BMSB), is a high-concern invasive species causing severe damage to orchards in many countries outside its native Asian range. Management methods other than frequent sprays of broad-spectrum insecticides are needed restore integrated pest management (IPM) practices orchards. Chitin synthesis inhibitors usually regarded as desirable options IPM programs because lower toxicity beneficial insects and non-target organisms compared neurotoxic insecticides. In this study, the activity three chitin (namely buprofezin, novaluron triflumuron) was investigated on BMSB egg masses, third instars adults by means laboratory bioassays.Novaluron lesser extent triflumuron were detrimental nymphs exposed residues potted peach plants. Novaluron caused high mortality among early that emerged from sprayed masses. No significant differences found between buprofezin water control eggs or instars. When adults, none affected survival, fecundity, hatching.Given nymphs, but lack effects might be considered for field applications only tool wider strategy along with aimed at preventing invasion crops adults. © 2023 Society Chemical Industry.

Language: Английский

---

Implementing Mass Rearing of Trissolcus japonicus (Hymenoptera: Scelionidae) on Cold-Stored Host Eggs

Insects, Journal Year: 2021, Volume and Issue: 12(9), P. 840 - 840

Published: Sept. 18, 2021

Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), a pest of Asian origin, has been causing severe damage to Italian agriculture. The application classical biological control by the release Trissolcus japonicus (Ashmead) (Hymenoptera: Scelionidae), an exotic egg parasitoid, appears be one promising solution. In Italy, releases T. in field were authorized 2020. this study, some parameters that could influence rearing insectaries investigated. A significantly higher production progeny was observed on host eggs stored at 6 °C (86.5%) compared −24 (48.8%) for up two months prior exposure parasitism. There no significant differences from single females vial provided with only mass (83.2%) or 10 inside cage masses (83.9%). parasitoids refrigerated (6 °C) H. 72 h led (62.1%) shorter exposures 48 (44.0%) 24 (37.1%). decline same female detected between first and second parasitization (41.3%). Adult 16 90 days had 87.1% survival rate, but decrease detected. These adjusted when specific aims such as individuals colony maintenance.

Language: Английский

---

Effect of the Localized Insecticides Spray Technique to Control Halyomorpha halys in Actinidia chinensis Orchards

Insects, Journal Year: 2024, Volume and Issue: 15(9), P. 723 - 723

Published: Sept. 20, 2024

Kiwifruit (Actinidia chinensis) cultivation is expanding worldwide, with China, New Zealand, and Italy being the major producing countries. Halyomorpha halys, brown marmorated stink bug, raising serious concerns to kiwifruit both in China Italy. This study aimed at improving chemical control efficacy against this pest by comparing two insecticide spray techniques (a conventional ray atomizer a trumpet-modified adapted for localized application) kiwifruit. In fact, often grown ‘pergola’ training system, which may reduce effectiveness of penetration into canopy. Experiments were performed naturally infested orchards Actinidia chinensis var. ‘Jintao’ A. deliciosa ‘Hayward’. Furthermore, mesh cages containing H. halys adults deployed within assess insects’ mortality 1, 3, 7, 10 days after an application during consecutive seasons. cultivar ‘Jintao’, systems similarly, while ‘Hayward’, overall significantly higher insect was recorded trumpet (94–100%) compared (59–78%). Crop damage also evaluated on cultivars, simulating grower applications techniques. At harvest, no difference emerged between techniques, provided better protection untreated (12–17% 33–47% injured fruits). Further investigations direction are needed considering restriction insecticidal active substances ongoing European Union need maximize available tools.

Language: Английский

---

Diversity, domain duplication, birth‐and‐death and adaptive evolution of fatty acyl‐CoA reductase genes in Hemiptera

Physiological Entomology, Journal Year: 2023, Volume and Issue: 48(2-3), P. 97 - 106

Published: June 28, 2023

Abstract Fatty acyl‐CoA reductases (FARs) play an important role in the synthesis of fatty alcohols various organisms. Based on function FAR genes, they can be used as a potential molecular target for controlling agricultural pests. Although genes have been studied number insects, gain, loss, and evolution between different Hemipteran species still require comprehensive systematic study. This study systematically identified analysed 352 from 12 species, including six typical true bug Cimex lectularius , Apolygus lucorum Halyomorpha halys Oncopeltus fasciatus Rhodnius prolixus Gerris buenoi . The per ranged 17 to 43, phylogenetic analysis showed that Hemiptera classified into 11 clades. gain loss occurred some species. These conform birth‐and‐death model evolutionary process. Through selection pressure analysis, we determined G. clade evolved under positive selection, with sites A at position 214 T 451, thus clarifying differences amino acids among providing better understanding mechanism FAR. In addition, structural revealed duplication two conservative domains, Rossmann‐fold domain sterile domain, four namely Bemisia tabaci Diaphorina citri R. Trialeurodes vaporariorum lays foundation further studies functions FAR, provides possible new control Hemiptera, especially stink bugs.

Language: Английский

---

Effect of the Localized Insecticides Spray Technique to Control Halyomorpha halys in Actinidia chinensis Orchards

Published: Aug. 15, 2024

Kiwifruit (Actinidia chinensis) cultivation is expanding worldwide being China, New Zealand and Italy the major producing countries. Halyomorpha halys, brown marmorated stink bug, has been raising serious concerns to kiwifruit both in China Italy. This study aimed at improving chemical control efficacy against this pest by comparing two insecticide spray techniques (a conventional ray atomizer a trumpet-modified adapted for localized application kiwifruit). In fact, often grown with ‘pergola’ training system, which may reduce effectiveness of penetration into canopy. Experiments have performed naturally infested orchards Actinidia chinensis var. ‘Jintao’ A. deliciosa ‘Hayward’ during consecutive seasons. Furthermore, mesh cages, each containing three H. halys adults, were deployed assess insects’ mortality 1, 3, 7 10 days after techniques. cultivar 'Jintao', systems similarly, while 'Hayward', an overall significantly higher insect was recorded trumpet atomizer. The crop damage also evaluated on cultivars, simulating grower applications At harvest, no difference emerged between techniques, provided better protection compared untreated control. Further investigations direction are needed considering restriction insecticidal active substances ongoing European Union need maximize available tools.

Language: Английский

---

Contact and Residual Toxicities of 16 Insecticides Against Three Stink Bugs (Halyomorpha halys, Nezara antennata and Riptortus pedestris)

The Korean Journal of Pesticide Science, Journal Year: 2021, Volume and Issue: 25(4), P. 316 - 323

Published: Dec. 31, 2021

Language: Английский

---