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https://www.readbyqxmd.com/read/29053585/companion-plants-for-aphid-pest-management
#1
REVIEW
Refka Ben-Issa, Laurent Gomez, Hélène Gautier
A potential strategy for controlling pests is through the use of "companion plants" within a crop system. This strategy has been used in several trials to fight against a major crop insect pest: the aphid. We reviewed the literature to highlight the major mechanisms by which a companion plant may act. Trials carried out under laboratory or field conditions revealed that companion plants operate through several mechanisms. A companion plant may be associated with a target crop for various reasons. Firstly, it can attract aphids and draw them away from their host plants...
October 20, 2017: Insects
https://www.readbyqxmd.com/read/29051614/genome-wide-identification-of-micrornas-responsive-to-ectropis-oblique-feeding-in-tea-plant-camellia-sinensis-l
#2
Anburaj Jeyaraj, Shengrui Liu, Xiao Zhang, Ran Zhang, Mingzhu Shangguan, Chaoling Wei
The tea plant (Camellia sinensis L.) is vulnerable to the geometrid Ectropis oblique; although microRNAs (miRNAs) are important for plant growth, development and stress response, the function of miRNAs in the response of C. sinensis to stress from E. oblique is unclear. To identify E. oblique stress-responsive miRNAs and their target genes in tea plant, three small RNA libraries were constructed from leaves subjected to mechanical wounding (MW), geometrid attack (GA) and from healthy control (CK) leaves. Using high-throughput sequencing, 130 known miRNAs and 512 novel miRNAs were identified; of these, differential expression under GA stress was observed for 36 known and 139 novel miRNAs...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29049958/sublethal-exposure-to-deltamethrin-reduces-the-abilities-of-giant-water-bugs-to-prey-upon-aedes-aegypti-larvae
#3
Wilson R Valbon, Franciele M Cruz, Gabryele S Ramos, Hudson V V Tomé, Eugênio E Oliveira
Freshwater ecosystems provide environmental conditions for many arthropod species, including pests like mosquitoes and beneficial insects. Giant water bugs, Belostoma anurum (Hemiptera: Belostomatidae), are aquatic insects that provide biological control of mosquitoes and small vertebrates in freshwater environments. However, the application of insecticides aiming to control mosquitoes can lead to insecticide exposures of aquatic predators that can result in their death or significant reductions in their behavioral abilities...
October 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29048585/mowing-height-influences-listronotus-maculicollis-coleoptera-curculionidae-oviposition-behavior-and-mechanical-removal-from-golf-course-putting-greens-but-not-larval-development
#4
Benjamin D Czyzewski, Benjamin A McGraw
The annual bluegrass weevil, Listronotus maculicollis (Kirby), is a highly destructive pest of golf course turfgrass in eastern North America. Previous research has demonstrated that females prefer to oviposit within short-mown turfgrasses (<1.25 cm), and these offspring have improved fitness traits compared with larvae developing in higher-mowed turf. However, damage to putting green turf (<3.55 mm) is rarely reported. We investigated whether this phenomenon was due to adult removal through mowing or an inability of larvae to develop within a shortened plant...
October 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29047308/characterization-of-organophosphate-pesticides-in-urine-and-home-environment-dust-in-an-agricultural-community
#5
Catherine M Tamaro, Marissa N Smith, Tomomi Workman, William C Griffith, Beti Thompson, Elaine M Faustman
CONTEXT: Organophosphorus insecticides (OPs) have been used to control agricultural pests found in Washington state. Farmworkers (FW) have higher exposure to OP pesticides than non-farmworkers (NFW), and FW children may in turn have higher exposure than NFW children. OBJECTIVE: To examine the association between the concentration in house dust of five OPs used commonly in pome fruit orchards and the concentration in urine of dialkylphosphate metabolites (DAP), in a cohort of Hispanic FW and NFW and their children...
October 19, 2017: Biomarkers: Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
https://www.readbyqxmd.com/read/29047221/selection-and-characterization-of-bacillus-thuringiensis-strains-from-northwestern-himalayas-toxic-against-helicoverpa-armigera
#6
Showkat A Lone, Abdul Malik, Jasdeep C Padaria
In this study, we present the selection and the characterization of Bacillus thuringiensis (Bt) strains with respect to their cry/cyt gene content and toxicity evaluation toward one of the most important polyphagous lepidopteran pest, Helicoverpa armigera. Fifty-six Bt isolates were obtained from 10 different regions of northwestern Himalayas, recording a total B. thuringiensis index of 0.62. Scanning electron microscopy revealed presence of bipyramidal, spherical, flat and irregular crystal shapes; SDS-PAGE analysis of spore-crystal mixtures showed the prominence of 130, 70, and 100 kDa protein bands in majority of the isolates; PCR analysis with primers for eight cry and cyt gene families and 13 cry gene subfamilies resulted in isolates showing different combinations of insecticidal genes...
October 18, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/29045682/effects-of-hermetic-storage-on-adult-sitophilus-oryzae-l-coleoptera-curculionidae-acoustic-activity-patterns-and-mortality
#7
A W Njoroge, R W Mankin, B W Smith, D Baributsa, Thomas Phillips
Hermetic storage is of interest to farmers and warehouse managers as a method to control insect pests in small storage facilities. To develop improved understanding of effects of hermetic storage on insect pest activity and mortality over time, oxygen levels, acoustic signals, and observations of visual movement were recorded from replicates of 25, 50, and 100 adult Sitophilus oryzae (L.) (Coleoptera: Curculionidae) hermetically sealed in 500- and 1,000-ml glass jars. Recordings were done for 28 d; twice daily for the first 6 d and twice weekly thereafter...
October 16, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29045654/crop-seedling-susceptibility-to-armadillidium-vulgare-isopoda-armadillidiidae-and-ommatoiulus-moreletii-diplopoda-iulidae
#8
Josh Douglas, Sarina Macfadyen, Ary Hoffmann, Paul Umina, Frank Peairs
The isopod, Armadillidium vulgare (Latreille) (Isopoda: Armadillidiidae), and the millipede, Ommatoiulus moreletii (Lucas) (Diplopoda: Iulidae), are increasingly being reported as pests of emerging broadacre crop seedlings in southern Australia. This is thought to be due to the increased adoption of stubble retention practices, leading to increased abundance of these soil-dwelling organisms. Here, we evaluate the propensity of A. vulgare and O. moreletii to damage a range of crop seedlings. Through the combined analysis of a controlled feeding trial and field reports, we show A...
October 16, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29045630/field-assessments-to-control-the-lesser-mealworm-coleoptera-tenebrionidae-using-diatomaceous-earth-in-poultry-houses
#9
D G P Oliveira, A K Bonini, L F A Alves, Jeb Owen
Control of the lesser mealworm (Alphitobius diaperinus Panzer, 1797 [Coleoptera: Tenebrionidae]) is usually conducted with chemical insecticides, which have limited efficacy as well as environmental and health risks. Diatomaceous earth (DE) is safe and effective in controlling many insects including lesser mealworm. However, little is known of DE efficacy against this pest. Thus, an assessment of DE was conducted for the first time in commercial broiler houses in Brazil, with the aim of developing a strategy for the use of DE in the control of this insect...
October 16, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29045595/performance-of-apanteles-hemara-hymenoptera-braconidae-on-two-amaranth-leaf-webbers-spoladea-recurvalis-and-udea-ferrugalis-lepidoptera-crambidae
#10
S T O Othim, K M Agbodzavu, R Kahuthia-Gathu, K S Akutse, S Muchemi, S Ekesi, K K M Fiaboe
Amaranth is an African indigenous vegetable that is gaining popularity due to its nutritional, medicinal, and economic values. In East Africa, frequent outbreaks of Lepidopteran leaf-webbers, Spoladea recurvalis F. (Lepidoptera: Crambidae) and Udea ferrugalis Hübner (1976) are reported on this crop, causing up to 100% foliage loss. The larval endoparasitoid Apanteles hemara Nixon is also frequently found associated with these pests during the outbreaks, however, its performance on both pests has never been documented...
October 14, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/29043534/male-produced-aggregation-pheromone-of-coffee-bean-weevil-araecerus-fasciculatus
#11
Shuai Yang, Xiao-Fang Zhang, Yu-Lin Gao, Dan Chen, Dong-Mei She, Tao Zhang, Jun Ning
The coffee bean weevil (CBW), Araecerus fasciculatus (De Geer, 1775), is a cosmopolitan stored-product pest, especially in tropical and subtropical areas. Previous reports showed evidence for aggregation behavior of CBW and this study aimed to identify and evaluate the aggregation pheromone of this pest. Whole-body solvent extractions were analyzed by coupled gas chromatography-mass spectrometry and comparison of male and female extracts showed a male-specific compound which was identified as squalene, 2,6,10,15,19,23-hexamethyl-2,6,10,14,18,22-tetracosahexaene...
October 17, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29042683/hormone-signaling-regulates-nymphal-diapause-in-laodelphax-striatellus-hemiptera-delphacidae
#12
Yifan Zhai, Zhiming Zhang, Huanhuan Gao, Hao Chen, Meng Sun, Wenqing Zhang, Yi Yu, Li Zheng
Diapause is a physiological adaptation that allows an organism to survive adverse environmental conditions. Diapause occurs at a specific developmental stage in each species. There are few reports regarding the molecular regulatory mechanism of nymphal diapause in Laodelphax striatellus, which is an important graminaceous crop pest. Our previous studies identified the conditions for nymphal diapause in this species. Here, we combined RNA sequencing transcriptomics and quantitative proteomic analyses to identify nymphal diapause-related genes and proteins...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29042676/semiochemical-mediated-enhancement-of-males-to-complement-sterile-insect-technique-in-management-of-the-tephritid-pest-bactrocera-tryoni-froggatt
#13
Mohammed Abul Monjur Khan, Nicholas C Manoukis, Terry Osborne, Idris M Barchia, Geoff M Gurr, Olivia L Reynolds
Queensland fruit fly, Bactrocera tryoni (Froggatt), is the most significant pest of Australia's $9 billion horticulture industry. The sterile insect technique (SIT) and cue-lure (a synthetic analogue of raspberry ketone (RK))-based male annihilation technique (MAT) are two of the most effective management tools against this pest. However, combining these two approaches is considered incompatible as MAT kills sterile and 'wild' males indiscriminately. In the present study we tested the effect of pre-release feeding of B...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29042590/effects-of-short-term-heat-shock-and-physiological-responses-to-heat-stress-in-two-bradysia-adults-bradysia-odoriphaga-and-bradysia-difformis
#14
Guodong Zhu, Ming Xue, Yin Luo, Guixia Ji, Fang Liu, Haipeng Zhao, Xia Sun
Bradysia odoriphaga and Bradysia difformis are devastating pests of vegetable, ornamental crops and edible mushrooms causing significant losses. Temperature may be an important factor restricting their population abundance in the summer. To determine the effects of short-term heat shock on adults, their survival, longevity and fecundity data were collected, and antioxidant responses and heat shock protein expression levels were examined. Our results indicated that the survival rates of Bradysia adults decreased rapidly after heat shock ≥36 °C, and the longevity and reproductive capacities were significantly inhibited, indicating that short-term heat shock had lethal and sub-lethal effects...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29040660/potential-of-three-trap-crops-in-managing-nezara-viridula-hemiptera-pentatomidae-on-tomatoes-in-florida
#15
T L Gordon, M Haseeb, L H B Kanga, J C Legaspi
The southern green stink bug, Nezara viridula (L.) (Hemiptera: Pentatomidae), is a serious insect pest of tomatoes in Florida. In this study, we examined the use of three species of trap crops to manage N. viridula in North Florida tomato crops in 2014 and 2015. We used striped sunflower (Helianthus annuus) (Asterales: Asteraceae) and wild game feed sorghum (Sorghum bicolor) (Poales: Poaceae) in both years, but different species of millet each year: browntop millet (Panicum ramosum) (Poales: Poaceae) in 2014 and pearl millet (Pennisetum glaucum) (Poales: Poaceae) in 2015...
October 11, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29040591/revised-distribution-of-bactrocera-tryoni-in-eastern-australia-and-effect-on-possible-incursions-of-mediterranean-fruit-fly-development-of-australia-s-eastern-trading-block
#16
Bernard C Dominiak, Richard Mapson
Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), commonly called 'Queensland fruit fly' in Australia, and Mediterranean fruit fly (Ceratitis capitata Wiedemann) (Diptera: Tephritidae) are the two most economically important fruit fly in Australia with B. tryoni in the east and Mediterranean fruit fly in the west. The two species coexisted for several decades, but it is believed that B. tryoni displaced Mediterranean fruit fly. In southeastern Australia, this was deemed inadequate for export market access, and a large fruit fly free zone (fruit fly exclusion zone) was developed in 1996 where B...
October 11, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29040567/effects-of-insect-growth-regulators-on-bagrada-hilaris-hemiptera-pentatomidae
#17
Shimat V Joseph
Bagrada hilaris (Burmeister) (Hemiptera: Pentatomidae) is a serious pest of cruciferous crops in the central coast of California. Management of B. hilaris primarily involves the use of broad spectrum insecticides, such as pyrethroids and neonicotinoids, when the pest invades a crop field. Insect growth regulators (IGRs) are known for their efficacy on nymphal stages of B. hilaris, but little is known about their transovarial effects. Thus, the major objective of this study was to determine the transovarial effects of IGRs such as novaluron, diflubenzuron, and azadirachtin, when adults are exposed to direct topical spraying and dried residues...
October 10, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29039281/inhibitory-effects-of-an-extract-from-non-host-plants-on-physiological-characteristics-of-two-major-cabbage-pests
#18
M Dastranj, E Borzoui, A R Bandani, O L Franco
The diamondback moth (Plutella xylostella) and small white cabbage butterfly (Pieris rapae) are the two main serious pests of cruciferous crops (Brassicaceae) that have developed resistance to chemical control methods. In order to avoid such resistance and also the adverse effects of chemical pesticides on the environment, alternative methods have usually been suggested, including the use of plant enzyme inhibitors. Here, the inhibitory effects of proteinaceous inhibitors extracted from wheat, canola, sesame, bean and triticale were evaluated against the digestive α-amylases, larval growth, development and nutritional indecs of the diamondback moth and small white cabbage butterfly...
October 17, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/29038661/assembly-and-annotation-of-transcriptome-provided-evidence-of-mirna-mobility-between-wheat-and-wheat-stem-sawfly
#19
Halise B Cagirici, Sezgi Biyiklioglu, Hikmet Budak
Wheat Stem Sawfly (WSS), Cephus Cinctus Norton (Hymenoptera: Cephidae), is one of the most important pests, causing yield and economic losses in wheat and barley. The lack of information about molecular mechanisms of WSS for defeating plant's resistance prevents application of effective pest control strategies therefore, it is essential to identify the genes and their regulators behind WSS infestations. Long non-coding RNAs (lncRNAs) and microRNAs (miRNAs) are recognized with their regulatory functions on gene expression, tuning protein production by controlling transcriptional and post-transcriptional activities...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29037161/transcript-expression-plasticity-as-a-response-to-alternative-larval-host-plants-in-the-speciation-process-of-corn-and-rice-strains-of-spodoptera-frugiperda
#20
Karina Lucas Silva-Brandão, Renato Jun Horikoshi, Daniel Bernardi, Celso Omoto, Antonio Figueira, Marcelo Mendes Brandão
BACKGROUND: Our main purpose was to evaluate the expression of plastic and evolved genes involved in ecological speciation in the noctuid moth Spodoptera frugiperda, the fall armyworm (FAW); and to demonstrate how host plants might influence lineage differentiation in this polyphagous insect. FAW is an important pest of several crops worldwide, and it is differentiated into host plant-related strains, corn (CS) and rice strains (RS). RNA-Seq and transcriptome characterization were applied to evaluate unbiased genetic expression differences in larvae from the two strains, fed on primary (corn) and alternative (rice) host plants...
October 16, 2017: BMC Genomics
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