scholarly journals First Insights on Early Host Plants and Dispersal Behavior of Halyomorpha halys (Hemiptera: Pentatomidae) from Overwintering to Crop Colonization

Insects ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 866
Author(s):  
Lara Bosco ◽  
Martina Nardelli ◽  
Luciana Tavella
Keyword(s):  
Host Plants ◽  
Pheromone Trap ◽  
Plant Host ◽  
Dispersal Capacity ◽  
Baited Traps ◽  
And Behavior ◽  
Protein Treatment ◽  
Crop Research ◽  
North Western ◽  
Capture Technique

Following its first detection in North Italy in 2012, H. halys has become a serious threat in many crops, including hazelnut. The present study aimed at investigating dispersal capacity and behavior in relation to host plants of overwintered adults of H. halys before the colonization of hazelnut crop. Research was carried out in four polyculture areas (from 14 to 50 ha) in north-western Italy in 2018, by using (i) pheromone-baited traps, (ii) visual inspection and beating sheet sampling, and (iii) immunomarking-capture technique. The relative abundance of H. halys was similar between and within the study areas, and the early attractiveness of lures to adults after overwintering was confirmed; the host plants near a pheromone trap (less than 5 m) hosted higher numbers of H. halys than the same plant species far away. Hybrid plane, European spindletree, walnut, oak, and European elder were the first plants on which adult bugs were observed to feed. By immunomarking-capture technique, H. halys showed both short- and long-range dispersal from overwintering sites and/or early host plants to wild and crop plants. Marked adults were found in all zones of each area, irrespective of the distance from the protein treatment. Therefore, H. halys movement patterns depend on the ecosystem features, and plant host distribution and availability. This knowledge together with the interaction between pheromone and early host plants might contribute to the management of post-overwintering adults.

scholarly journals Responses of Red Flour Beetle Adults, Tribolium castaneum (Coleoptera: Tenebrionidae), and Other Stored Product Beetles to Different Pheromone Trap Designs

Insects ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 733
Author(s):  
Carl W. Doud ◽  
Thomas W. Phillips
Keyword(s):  
Tribolium Castaneum ◽  
Field Experiments ◽  
Pitfall Trap ◽  
Pheromone Trap ◽  
Sticky Trap ◽  
Red Flour Beetle ◽  
Blow Down ◽  
Trap Design ◽  
Baited Traps ◽  
Coleoptera Tenebrionidae

A series of laboratory and field experiments were performed to assess the responses of Tribolium castaneum (Herbst) and other stored-product beetles to pheromone-baited traps and trap components. A commercial Tribolium pitfall trap called the Flit-Trak M2, the predecessor to the Dome trap, was superior in both laboratory and field experiments over the other floor trap designs assessed at capturing walking T. castaneum. In field experiments, Typhaea stercorea (L.) and Ahasverus advena (Stephens) both preferred a sticky trap to the pitfall trap. Although the covered trap is effective at capturing several other species of stored product beetles, the synthetic Tribolium aggregation pheromone lure is critical for the pitfall trap’s efficacy for T. castaneum. Although the food-based trapping oil used in the pitfall trap was not found to be attractive to T. castaneum when assayed alone, it had value as an enhancer of the pheromone bait when the two were used together in the trap. A dust cover modification made to go over the pitfall trap was effective in protecting the trap from dust, although the trap was still vulnerable to dust contamination from sanitation techniques that used compressed air to blow down the mill floors. Capture of T. castaneum in the modified trap performed as well as the standard trap design in a non-dusty area of a flour mill, and was significantly superior over the standard trap in a dusty area. T. castaneum responded in flight outside a flourmill preferentially to multiple funnel traps with pheromone lures compared to traps without pheromone.

scholarly journals The Cpc1 Regulator of the Cross-Pathway Control of Amino Acid Biosynthesis Is Required for Pathogenicity of the Vascular Pathogen Verticillium longisporum

2013 ◽  
Vol 26 (11) ◽  
pp. 1312-1324 ◽  
Author(s):  
Christian Timpner ◽  
Susanna A. Braus-Stromeyer ◽  
Van Tuan Tran ◽  
Gerhard H. Braus
Keyword(s):  
Amino Acid ◽  
Oilseed Rape ◽  
Host Plants ◽  
Pathogenic Fungus ◽  
Amino Acid Biosynthesis ◽  
Amino Acid Starvation ◽  
Acid Biosynthesis ◽  
Plant Host ◽  
Verticillium Longisporum ◽  
The Cross

The plant-pathogenic fungus Verticillium longisporum is a causal agent of early senescence and ripening in cruciferous crops like Brassica napus. Verticillium wilts have become serious agricultural threats in recent decades. Verticillium species infect host plants through the roots and colonize xylem vessels of the host plant. The xylem fluid provides an environment with limited carbon sources and unbalanced amino acid supply, which requires V. longisporum to induce the cross-pathway control of amino acid biosynthesis. RNA-mediated gene silencing reduced the expression of the two CPC1 isogenes (VlCPC1-1 and VlCPC1-2) of the allodiploid V. longisporum up to 85%. VlCPC1 encodes the conserved transcription factor of the cross-pathway control. The silenced mutants were highly sensitive to amino-acid starvation, and the infected plants showed significantly fewer symptoms such as stunting or early senescence in oilseed rape plant infection assays. Consistently, deletion of single CPC1 of the haploid V. dahliae resulted in strains that are sensitive to amino-acid starvation and cause strongly reduced symptoms in the plant-host tomato (Solanum lycopersicum). The allodiploid V. longisporum and the haploid V. dahliae are the first phytopathogenic fungi that were shown to require CPC1 for infection and colonization of their respective host plants, oilseed rape and tomato.

EVALUATION OF PHEROMONE-BAITED TRAPS AND PHEROMONE LURE CONCENTRATIONS FOR MONITORING BLUEBERRY LEAFTIER (LEPIDOPTERA: TORTRICIDAE) POPULATIONS

1992 ◽  
Vol 124 (5) ◽  
pp. 815-825 ◽  
Author(s):  
Sridhar Polavarapu ◽  
William D. Seabrook
Keyword(s):  
Ice Cream ◽  
Population Monitoring ◽  
Pheromone Trap ◽  
Mass Trapping ◽  
Trap Design ◽  
Baited Traps ◽  
Pheromone Concentration ◽  
Coefficients Of Variation ◽  
Highly Correlated ◽  
Trap Catches

AbstractSix pheromone trap designs, including five high-capacily and a sticky trap, and four PVC lure concentrations of pheromone were evaluated for monitoring blueberry leaftier populations in six blueberry fields in Nova Scotia. Larval densities and subsequent male moth catches in the same year for all the trap designs evaluated, except double funnel traps, were highly correlated. Multipher III traps captured the highest number of moths, followed by Unitraps and double funnel traps. The ice cream container trap captured significantly fewer moths than any other trap design. At most locations, the first moth was caught on the same day in all the trap designs except the ice cream container trap. Trap catches increased with increasing pheromone concentration up to 0.03% dose. Traps baited with 0.3% lures captured significantly fewer moths than those with 0.003% or 0.03%. Based on mean trap catches, R2 values, coefficients of variation among traps, trap efficiency, and lure evaluations, the Unitraps baited with 0.003% lures are selected for further development of a population monitoring system for blueberry leaftier moths. The Multipher III traps baited with 0.03% lures captured up to 44 000 male moths (mean per trap per season) at high densities, demonstrating their potential in mass trapping blueberry leaftiers.

New species in the treehopper genus Bocydium Latreille, with description of nymphal stages and observations on their natural history

Zootaxa ◽  
2017 ◽  
Vol 4281 (1) ◽  
pp. 22
Author(s):  
CAMILO FLÓREZ-V ◽  
OLIVIA EVANGELISTA
Keyword(s):  
Life History ◽  
New Species ◽  
Field Data ◽  
Host Plants ◽  
Key To Species ◽  
Type Specimens ◽  
Colombian Andes ◽  
Nomenclatural Change ◽  
Primary Type ◽  
And Behavior

Six new species of Bocydium Latreille are described, and life history notes are provided based on field data from the Central and Western Cordilleras of the Colombian Andes. Information on host plants, treehopper-ant mutualisms, and behavior of adults and nymphs are provided for most newly discovered species (B. bilobum Flórez-V sp. nov., B. hadronotum Flórez-V sp. nov., B. mae Flórez-V sp. nov., B. sakakibarai Flórez-V sp. nov., B. sanmiguelense Flórez-V sp. nov., and B. tatamaense Flórez-V sp. nov.) in addition to two previously known species of Bocydium. A key to species of the genus is presented, along with photographs of primary type specimens for all species described by Dr. Albino M. Sakakibara. A nomenclatural change is proposed for B. cubitale Richter, 1954 syn. nov., herein considered junior synonym of B. bullife-rum Goding, 1930. 

The influence of pheromone trap design and placement on catch of the red bollworm of cotton Diparopsis castanea Hampson (Lepidoptera: Noctuidae)

1978 ◽  
Vol 68 (1) ◽  
pp. 31-46 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Ground Level ◽  
Pheromone Trap ◽  
Trap Design ◽  
Baited Traps ◽  
Significant Difference ◽  
Cotton Fields ◽  
Monitoring Traps ◽  
Monitoring Trap ◽  
Lepidoptera Noctuidae

AbstractThree suitable sex pheromone trap designs for trapping the red bofiworm of cotton, Diparopsis castanea Hmps., including a simple omnidirectional monitoring trap, are described. In trials in Malawi, Diparopsis was more readily trapped on open horizontal trapping surfaces (water or adhesive) than in enclosed types of traps. The presence of a roof above the trapping surface, at spacings of up to 20 cm, significantly reduced catches. White traps, or unpainted traps in the case of vane traps constructed from galvanised metal, caught more moths than traps of other colours. Catches were greatest when monitoring traps in cotton were placed at ground level or at a height of 0·5 m and, when dicastalure was released from polyethylene vials, by employing a trap 60 cm in diameter. Evidence was obtained that competition may exist between female-baited traps spaced up to 73 m apart, although catches in traps baited with dicastalure were not significantly different when traps were 40–60 m apart. The greatest catches of moths in cotton were in traps located in insecticide-sprayed fields, but moths were also trapped in considerable numbers in other crops and to a reduced extent in open areas 4·8 km from the nearest cotton. From about the end of February, catches in maize, groundnut and fallow areas frequently exceeded the catches recorded within cotton fields, which may indicate an increased dispersal flight from cotton by adult moths later in the season. Weekly replacement in monitoring traps of polyethylene vials containing dicastalure produced maximum moth catches, but there was no significant difference in catch between traps in which pheromone was replaced at intervals of 2, 3, 4 or 6 weeks.

Effect of herbicide combinations on weed dynamics, nutrient removal and yield of Wheat (Triticum aestivum L.) under north western plain zone

2017 ◽  
Vol 2 (01) ◽  
pp. 10-15
Author(s):  
Adesh Singh
Keyword(s):  
Triticum Aestivum ◽  
Weed Control ◽  
Triticum Aestivum L ◽  
Research Centre ◽  
Metsulfuron Methyl ◽  
Npk Uptake ◽  
Weed Dynamics ◽  
Crop Research ◽  
North Western ◽  
Clodinafop Propargyl

A field experiment was conducted to study the effect of different weed control practices on weed dyanamics, nutrient uptake and yield of wheat (Triticum aestivum L.) in rabi seasons of 2010-11 and 2011-12 at Crop Research Centre of SVPUAandT, Meerut. The treatments comprising pre-emergence application of pendimethalin @ 1000 g/ha, post emergence application of isoproturon @1200 g/ha, isoproturon+2,4-D @ 1200+600 g/ha, isoproturon+metsulfuron methyl @ 1200+4 g/ha, fenoxaprop -p-ethyl @ 80 g/ha, fenoxa prop -p-ethyl +2,4-D @ 80+600 g/ha, fenoxa prop -p-ethyl +metsulfuron methyl @ 80+4 g/ha, clodinafop propargyl @ 60 g/ha, clodinafop propargyl+2,4-D @ 60+600 g/ha and clodinafop propargyl+metsulfuron methyl @ 60+4 g/ha were tested with weed free and weedy check. Among the herbicides, application of clodinafop propargyl+ metsulfuron (60+4 g/ha) though statistically on par with clodinafop propargyl+ 2,4-D (60+600 g/ha) reduced the weed population significantly than weedy check (97.2%), clodinafop propargyl alone (88.0%), fenoxaprop -p-ethyl alone (83.0%), isoproturon alone (80.0%), isoproturon+metsulfuron (72.2%), pendimethalin (71.4%), isoproturon+2,4-D (53.8%), fenoxa prop -p-ethyl +2,4-D (53.8%) and fenoxa prop -p-ethyl + metsulfuron (40.0%) at 60 days after sowing stage. Among the herbicides, application of Clodinafop propargyl+ metsulfuron methyl (60+4 g/ha) as post emergence resulted into highest grain yield of wheat (49.28q/ha) which was on par with weed free and clodinafop propargyl+2,4-D @ 60+600 g/ha but statistically significant than rest of the treatments. Highest NPK uptake by grain and straw of wheat was recorded in weed free conditions compared to the herbicidal treatments, except lodinafop propargyl+metsulfuron methyl and clodinafop propargyl+ 2, 4-D. Highest removal of NPK (63.6 kg/ha) by weeds was recorded in weedy check whereas, the minimum NPK uptake (28.4 kg/ha) was noticed with the application of clodinafop propargyl+metsulfuron methyl due to efficient control of weeds (weed control efficiency 84.7%), which resulted in lowest weed dry matter in this treatments.

scholarly journals Natal habitat conditions have carryover effects on dispersal capacity and behavior

Ecosphere ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. e02465 ◽  
Author(s):  
Celina B. Baines ◽  
Shannon J. McCauley
Keyword(s):  
Habitat Conditions ◽  
Carryover Effects ◽  
Dispersal Capacity ◽  
Natal Habitat ◽  
And Behavior

The nematode genus Fergusobia (Nematoda: Neotylenchidae): molecular phylogeny, descriptions of clades and associated galls, host plants and Fergusonina fly larvae

Zootaxa ◽  
2010 ◽  
Vol 2633 (1) ◽  
pp. 1 ◽  
Author(s):  
KERRIE A. DAVIES ◽  
WEIMIN YE ◽  
ROBIN M. GIBLIN-DAVIS ◽  
GARY S. TAYLOR ◽  
SONJA SCHEFFER ◽  
...  
Keyword(s):  
Molecular Phylogeny ◽  
Host Plants ◽  
The Philippines ◽  
Biological Information ◽  
Morphological Evidence ◽  
Host Switching ◽  
Dorsal Shield ◽  
Plant Host ◽  
Third Stage ◽  
Collection Data

Collection data and biological information is presented on the genus Fergusobia (Nematoda: Neotylenchidae) from Australasia, India and The Philippines, an emended diagnosis of the genus is presented, and its putative phylogeny is discussed based on molecular and morphological evidence. About 20 clades have been found, and are outlined, including information on nematode and fly morphology; plant host species and distribution. Fly morphology, particularly the structure of the dorsal shield of third stage larvae, is congruent with the clades of nematodes, suggesting coevolution. However, little evidence of coevolution between the fly/nematode association and their host plants is apparent: host-switching appears to have been common, although host-specificity is stringent among most clades. A key to the species and morphospecies of nematodes collected from Corymbia, Angophora, Metrosideros, Syzygium, narrow-leaved Melaleuca, and Eucalyptus is presented.

scholarly journals Identification and functional analysis of diet-responsive genes in Spodoptera litura (Fabricius)

2020 ◽  
Author(s):  
Li Wang ◽  
Peng Zhao ◽  
Junyu Luo ◽  
Chunyi Wang ◽  
Xiangzhen Zhu ◽  
...  
Keyword(s):  
Cytochrome P450 ◽  
Spodoptera Litura ◽  
Host Plants ◽  
Glutathione Metabolism ◽  
Larval Performance ◽  
Rna Seq ◽  
Plant Host ◽  
Cytochrome P450 Genes ◽  
Wide Range ◽  
Plant Hosts

Abstract Spodoptera litura is one of the most devastating agricultural pests with a wide range of host plants. To study larval performance on different diets and midgut adaptation at transcriptional levels, feeding assay and RNA-Seq experiments were conducted. RNA interference technology was used to explore the detoxification and metabolism of two cytochrome P450 genes. The bioassay data showed that S. litura larvae developed more quickly when fed on cabbage than when fed on soybean, corn and cotton, tannin can inhibit the growth of S. litura . The result of RNA-Seq indicated that S. litura midgut modified gene expression levels to accommodate different diets, and the most differentially expressed genes were detoxification-related and digestion-related genes . Further analysis showed that the glutathione metabolism pathway was the common detoxification pathway in S. litura. The expression of cytochrome P450 genes showed a clear response to different plant hosts, and these differences may play key functions in primary detoxification of secondary metabolites from host plants. Meanwhile, the digestive enzymes of proteinases, lipases, and carbohydrases in midgut showed special responses to different plant hosts. After injection of dsRNA of CYP321A19 and CYP6AB60 , the expression level of target gene were decreased, and the sensitivity of insect to plant allelochemicals increased and the weight increase significantly slowed. In this study, genes involved in detoxification were identified, and the results demonstrate the genes and pathways S. litura utlize to detoxify specific plant-host allelochemicals. These results may also provide a theoretical basis for S. litura management.

Sign in / Sign up

Export Citation Format

Share Document