This paper proposes a wind-speed-adaptive resonant piezoelectric energy harvester for offshore wind collection (A-PEH). The device incorporates coil spring structure, which sets the maximum threshold of output rotational frequency, allowing A-PEH to maintain stable frequency over broader range speeds. When excitation falls within sub-resonant beam, becomes wind-speed-adaptive, enabling it operate in state wider Offshore winds exhibit an annual average speed exceeding 5.5 m/s with significant...

Abstract The brown planthopper (BPH), Nilaparvata lugens , is an important pest that affects rice ( Oryza sativa ) production in Asia. flavone tricin (5,7,4′-trihydroxy-3′,5′-dimethoxy flavone) a valuable secondary metabolite commonly found plants can defend against infestation by BPH. BPH damage reduce the metabolic level of rice. Our preliminary transcriptome research results showed salivary protein 7 (NlSP7), highly responsive to stimuli. However, function NlSP7 mediating interaction...

Triboelectric nanogenerators (TENGs) can effectively collect low-frequency, disordered mechanical energy and are therefore widely studied in the field of ocean collection. Most rotary TENGs so far tend to have insufficient rotation, resulting slow charge transfer rates low-frequency environments. For this reason, paper, we propose a wind-wave synergistic triboelectric nanogenerator (WWS-TENG). It is different from traditional based on free-standing mode that its power generation unit has two...

Apanteles cypris is an endoparasitoid of rice pest Cnaphalocrocis medinalis. To better understand its host location mechanism, we examined the external morphology antennal sensilla A. via scanning electron microscopy. The antennae male and female were filiform in shape, which consist scape, pedicel, flagellum with 18 antennomeres. Eleven types recorded both sexes, including two chaetica sensilla, trichodea without pore, basiconica I a tip II wall pores, III mastoid at tip, coeloconica...

The Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae), is a key vector of the causal agents Huanglongbing (HLB), devastating disease affecting almost worldwide. Nicotiana tabacum L. an important commercial crop in China. Field observations suggested that D. adults die on N. leaves when grown nearby orchards. In this study, preference for and survivorship their feeding behavior were investigated. results showed attracted to green leaf volatiles (GLVs) ( Z )-3-hexenol E...

Fruit flies are important economic pests of fruits, vegetables, and nuts all over the world. In this study, a permanent ecological trap, which was created by ovicidal effect phytogenic hydrogen cyanide (HCN) liberated from passion fruits due to oviposition fruit can be used in pest management, were determined.Observation fly eggs Passiflora within cultivation region southern China, Aug 2019 Oct 2020 showed that exotic attracted native oviposit, but could not hatch. Using classical staging...

Abstract Anopheles gambiae s.s. is a key vector of Plasmodium parasites. Repellents, which may be promising alternative to pesticides used control malaria mosquitoes. Although citronellal known mosquito repellent, its repellency characteristics are largely unknown. Determining the specific odorant-binding proteins (OBPs) and odorant receptors (ORs) that detect transfer molecule in A. will help define mode action this compound. In research, we assessed repellent activity using Y-tube...

A Pichia pastoris (P. pastoris) cell surface display system of Bombyx mori acetylcholinesterase (BmAChE) was constructed and its bioactivity studied. The modified gene (bmace) fused with the anchor protein (AGα1) from Saccharomyces cerevisiae transformed into P. strain GS115. recombinant harboring fusion bmace-AGα1 induced to BmAChE on surface. Fluorescence microscopy flow cytometry assays revealed that successfully displayed enzyme activity detected by Ellman method at 787.7 U/g (wet...

The spiralling whitefly, Aleurodicus dispersus Russell, is a tropical pest that attacks variety of horticultural crops and ornamental plants. Seven host plants were chosen to analyse the preference A. dispersus. Our results showed Pterocarpus indicus (a key host) significantly attracted To find attractants could be used control either by mass trapping or monitoring as part integrated management, essential oils seven analysed gas chromatography coupled with electroantennographic detection...

Tetrastichus howardi (Olliff) (Hymenoptera: Eulophidae), a pupal parasitoid of great number Lepidoptera pests, has potential for biological control. To investigate the olfactory system this parasitoid, we examined morphology and ultrastructure antennal sensilla both male female T. using scanning transmission electron microscopic techniques. Antennae were geniculate in shape, which consisted scape, pedicel flagellum with 5 4 flagellomeres, respectively. The sexual differences recorded types,...

We investigated the external morphology, eye size, facet and numbers of ommatidia ommatrichia compound eyes Bactrocera cucurbitae (Coquillett) (Diptera: Tephritidae), tau (Walker) dorsalis (Hendel) using light scanning electron microscopy. There significant differences were found between females males 3 species. The results contribute to further exploration relationship ultrastructural dimensions features visually-based behaviors these

Abstract Taking a published natural population life table of rice leaf roller, Cnaphalocrocis medinalis (Lepidoptera: Pyralidae), as an example, we estimated the trend index, I , via re‐sampling methods (jackknife and bootstrap), determined its statistical properties illustrated application these in determining control effectiveness bio‐agents chemical insecticides. Depending on simulation outputs, smoothed distribution pattern estimates by delete‐1 jackknife is visually distinguishable from...

Cyrtorhinus lividipennis Reuter (Hemiptera: Miridae: Orthotylinae), including nymphs and adults, are one of the dominant predators have a significant role in biological control leafhoppers planthoppers irrigated rice. In this study, we investigated antennal morphology, structure sensilla distribution C. different instars using scanning electron microscopy. The antennae both five nymphal stages adults were filiform shape, which consisted scape, pedicel flagellum with two flagellomeres. There...

Euplatypus parallelus (F.) (Coleoptera: Curculionidea) is the most destructive cosmopolitan insect pest of Platypodinae. Pheromone-based luring agents are used currently in controlling bark beetle. Antennae primary organs sensing volatiles host trees and pheromones pioneer males. We studied external morphology antennae type, distribution, number beetle sensilla. Our results show E. have a geniculate antenna composed 6 segments, namely scape, 4-segmented funicle club. Ninety-seven percent...

Abstract Whiteflies have distinct nymphal stages: their first stage is mobile, whereas the later immature stages are sessile. The developmental and structural changes of antennae antennal sensilla in whiteflies during these rarely been investigated. This paper describes morphology four Aleurodicus dispersus based on scanning electron microscopy. There were significant differences found shape length antennae, type, number, morphological structure distributional pattern A. . We two types...

Resistant crop varieties can usually decrease the population density of insect pests; however, they also easily cause occurrence highly virulent pest populations when repeatedly grown. Whether herbivorous insects feeding intermittently on a susceptible variety affects their subsequent virulence has rarely been investigated. In this paper, we examined variations in brown planthopper (BPH), Nilaparvata lugens (Stål) (Hemiptera: Delphacidae), by alternately rearing three resistant rice...