OVIPOSITION TRAP TO SAMPLE EGGS OF OPEROPHTERA BRUCEATA (LEPIDOPTERA: GEOMETRIDAE) AND OTHER WINGLESS GEOMETRID SPECIES

Christian Hébert; Luc St-Antoine

doi:10.4039/ent131557-4

OVIPOSITION TRAP TO SAMPLE EGGS OF OPEROPHTERA BRUCEATA (LEPIDOPTERA: GEOMETRIDAE) AND OTHER WINGLESS GEOMETRID SPECIES

The Canadian Entomologist ◽

10.4039/ent131557-4 ◽

1999 ◽

Vol 131 (4) ◽

pp. 557-565 ◽

Cited By ~ 4

Author(s):

Christian Hébert ◽

Luc St-Antoine

Keyword(s):

Polyurethane Foam ◽

Host Tree ◽

Egg Density ◽

Fall Cankerworm ◽

Bruce Spanworm ◽

Oviposition Sites ◽

Oviposition Trap

AbstractFor the last 50 years, populations of the Bruce spanworm, Operophtera bruceata Hulst, and other wingless geometrid species have been sampled using sticky bands placed around host-tree trunks to catch wingless females in search of oviposition sites. This method is tedious and, because of trap saturation by males, may underestimate female populations at moderate to high levels. A standard oviposition trap was developed to sample eggs of the Bruce spanworm and other wingless geometrid species. A small polyurethane foam band placed on a post covered by a Multi-Pher® plate detected low populations and was almost unsaturable during outbreaks. Sub-sampling can be easily done in such situations. Egg density on oviposition traps was higher than female density on sticky bands for both the Bruce spanworm and the fall cankerworm, Alsophila pometaria Harris. This suggests that the oviposition trap might be useful to sample other wingless geometrid species. Operating this system was easy and could involve woodlot owners and companies to reduce the traveling costs necessary to collect samples.

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EVALUATION OF AN OVIPOSITION TRAP FOR MONITORING EGG POPULATIONS OF DIABROTICA SPP. (COLEOPTERA: CHRYSOMELIDAE) IN FIELD CORN

The Canadian Entomologist ◽

10.4039/ent127839-6 ◽

1995 ◽

Vol 127 (6) ◽

pp. 839-849 ◽

Cited By ~ 3

Author(s):

Barbara S. Mulock ◽

Cliff R. Ellis ◽

Gary H. Whitfield

Keyword(s):

Water Saturation ◽

Aggregate Size ◽

Economic Damage ◽

Metal Ring ◽

Corn Rootworm ◽

Field Corn ◽

Corn Plants ◽

Clay Aggregates ◽

Oviposition Sites ◽

Oviposition Trap

AbstractTraps consisting of open, cylindrical tins containing moistened clay aggregates were evaluated as field oviposition sites for corn rootworm, Diabrotica spp. Six trap features were investigated: clay aggregate size, water saturation level, trap opening, trap cover, trap volume, and trap position relative to corn plants. More eggs were recovered in traps containing clay aggregates ranging from 0.5 to 3.5 mm diameter compared with aggregates from 2.5 to 8.0 mm diameter. Saturation of the trap to 2.5 cm from the opening resulted in greater egg recovery compared with traps saturated to 6.0 cm from the opening. Covering the exposed surface of the trap with a metal ring and/or a corn leaf increased egg recovery in the field.Oviposition traps were placed in four commercial corn fields in 1990 and three in 1991 to monitor egg populations. Egg recovery from traps and estimates of the absolute egg population in the soil were compared with densities of adult corn rootworm to predict larval damage on roots of corn planted the next year. In five fields, adult populations were above the current economic threshold of one beetle per plant. However, economic damage to roots occurred only in the field in which the most eggs were recovered from traps (226.6 eggs per trap) and soil samples (30.2 eggs per litre). Mean egg recovery per trap per field was correlated with mean damage ratings from untreated corn.

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Social signals mediate oviposition site selection in Drosophila suzukii

Scientific Reports ◽

10.1038/s41598-021-83354-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Johanna E. Elsensohn ◽

Marwa F. K. Aly ◽

Coby Schal ◽

Hannah J. Burrack

Keyword(s):

Site Selection ◽

Oviposition Behavior ◽

Oviposition Site ◽

Invasive Pest ◽

Oviposition Site Selection ◽

Social Signals ◽

Drosophila Suzukii ◽

Egg Density ◽

Behavioral Evidence ◽

Oviposition Sites

AbstractThe information that female insects perceive and use during oviposition site selection is complex and varies by species and ecological niche. Even in relatively unexploited niches, females interact directly and indirectly with conspecifics at oviposition sites. These interactions can take the form of host marking and re-assessment of prior oviposition sites during the decision-making process. Considerable research has focused on the niche breadth and host preference of the polyphagous invasive pest Drosophila suzukii Matsumura (Diptera: Drosophilidae), but little information exists on how conspecific signals modulate oviposition behavior. We investigated three layers of social information that female D. suzukii may use in oviposition site selection—(1) pre-existing egg density, (2) pre-existing larval occupation, and (3) host marking by adults. We found that the presence of larvae and host marking, but not egg density, influenced oviposition behavior and that the two factors interacted over time. Adult marking appeared to deter oviposition only in the presence of an unmarked substrate. These results are the first behavioral evidence for a host marking pheromone in a species of Drosophila. These findings may also help elucidate D. suzukii infestation and preference patterns within crop fields and natural areas.

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Infestation of Aedes aegypti estimated by oviposition traps in Brazil

Revista de Saúde Pública ◽

10.1590/s0034-89102005000400006 ◽

2005 ◽

Vol 39 (4) ◽

pp. 553-558 ◽

Cited By ~ 22

Author(s):

Vanêssa C G Morato ◽

Maria da Glória Teixeira ◽

Almério C Gomes ◽

Denise P Bergamaschi ◽

Maurício L Barreto

Keyword(s):

Aedes Aegypti ◽

Northeastern Brazil ◽

Measurement Tool ◽

Entire Study Period ◽

Entomological Surveillance ◽

Public Programs ◽

Entire Study ◽

Egg Density ◽

Density Indices ◽

Oviposition Trap

OBJECTIVE: To assess infestation levels of Aedes aegypti using the oviposition trap (ovitrap) method and to compare these results with data obtained with the use of indices traditionally applied in public programs aimed at fighting this vector. METHODS: Nine sentinel areas in Northeastern, Brazil, were assessed and infestation levels were measured for a nine-month period. Egg density and container indices were estimated and compared with previous results found using the house index and Breteau index. RESULTS: The results indicated that the area studied was infested with this vector during the entire study period and that the infestation was widespread in all areas. Different results were found with the different indices studied. There were areas in which the house index and the Breteau index were negative or close to zero, whereas the container index for the same area was 11% and the egg density index was 8.3%. CONCLUSIONS: The container and egg density indices allow better assessment of infestation rates in a city than the conventionally used indices (house index and Breteau index). At lower operational costs and easier standardization, these indices can be applied as a measurement tool for assessing infestation rates during entomological surveillance in programs to fight Aedes aegypti.

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Polyurethane foam strips to estimate parasitism of hemlock looper (Lepidoptera: Geometridae) eggs by Telenomus spp. (Hymenoptera: Scelionidae)

The Canadian Entomologist ◽

10.4039/n05-031 ◽

2006 ◽

Vol 138 (1) ◽

pp. 114-117 ◽

Cited By ~ 4

Author(s):

Christian Hébert ◽

Richard Berthiaume ◽

Clément Bordeleau

Keyword(s):

Polyurethane Foam ◽

Extraction Process ◽

Population Management ◽

New Method ◽

Standard Tool ◽

Egg Parasitism ◽

Hemlock Looper ◽

Oviposition Trap

AbstractAn oviposition trap recently developed to survey hemlock looper (Lambdina fiscellaria (Guenée)) eggs and consisting of a small strip of white polyurethane foam stapled to the tree bole provides reliable estimates of Telenomus spp. parasitism on hemlock looper eggs. Oviposition traps are a standard tool that never varies. They allow us to avoid the tedious and expensive extraction process used when collecting eggs from branches. This new method can be implemented rapidly in a high number of plots and provides the egg parasitism estimates needed in spring to improve hemlock looper population management.

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Comparison Between Larval Survey Index and Positive Ovitrap Index in the Evaluation of Populations of Aedes (Stegomyia) aegypti (Linnaeus, 1762) North of Paraná, Brazil

Environmental Health Insights ◽

10.1177/1178630219886570 ◽

2020 ◽

Vol 14 ◽

pp. 117863021988657 ◽

Cited By ~ 3

Author(s):

Kauani Larissa Campana Nascimento ◽

João Fernando Marques da Silva ◽

João Antonio Cyrino Zequi ◽

José Lopes

Keyword(s):

Urban Areas ◽

Official Method ◽

Low Density ◽

Breeding Sites ◽

Larval Survey ◽

Egg Density ◽

Medical Importance ◽

Cost Efficient ◽

Reliable Methods ◽

Oviposition Trap

Aedes ( Stegomyia) aegypti (Linnaeus, 1762) is one of the world’s most widely distributed mosquitoes and is the vector of the dengue virus, one of the most important reemerging diseases. Besides dengue, A. aegypti can also transmit urban yellow fever, chikungunya, and Zika virus, making it of great medical importance. Thus, it is of extreme importance to find reliable methods to evaluate the presence of A. aegypti in urban areas. In Brazil, rapid index surveys of Aedes aegypti by means of larval survey (LIRAa) is the official method to estimate the Breteau (BI) and property infestation (PII) indexes, which indicates how many infested containers with larvae of A. aegypti were found by the total number of properties surveyed and the proportion of houses infested, respectively. As the LIRAa requires access to private residences and trained personal to find breeding sites and do not reveal the mosquito’s presence when in low density, it has not demonstrated efficacy in determining the presence of A. aegypti. To evaluate an alternative method, the LIRAa method was compared with an oviposition trap, made with hay infusion and a hardboard pallet, to evaluate the BI and the PII. The 2 methods were carried out simultaneously through 4 surveys, sampling 60 homes per survey. To evaluate the best configuration of ovitraps for surveillance of A. aegypti, the ovitraps were installed in intradomicile and peridomicile areas, with 1 to 5 traps per residence and with 1 to 3 pallets per trap, and these different configurations were compared using the positive ovitrap index (POI) and egg density index (EDI). The ovitraps showed greater sensitivity for detecting the presence of A. aegypti, with a BI of 72.5% and PII of 54.2%, whereas the LIRAa revealed only 2.1% for the BI and 1.3% for the PII. Therefore, the use of sentinel traps can provide information in a more rapid and precise manner. As there were no differences in the ovitraps distributions patterns, the ovitraps can be installed in the peridomicile area, with 2 traps per surveillance point and 1 pallet per trap, making their installation easier and more cost-efficient, facilitating the work of health agents in future surveillances complementing LIRAa’s actions for efficient monitoring.

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Actual procedures of diagnostics and treatments of crural venous ulcer in specialized German praxis and clinics

Phlebologie ◽

10.1055/s-0037-1622259 ◽

2009 ◽

Vol 38 (02) ◽

pp. 77-82 ◽

Cited By ~ 3

Author(s):

P. Altmeyer ◽

M. Stücker ◽

S. Reich-Schupke

Keyword(s):

Annual Meeting ◽

Polyurethane Foam ◽

Surgical Therapy ◽

Compression Therapy ◽

German Society ◽

Venous Ulcer ◽

Ulcus Cruris ◽

Wound Dressings

Summary Background: To evaluate the implementation of the guidelines of the German Society of Phlebology for venous crural ulcer a survey was conducted during the annual meeting of the German Society of Phlebology 2008 in Bochum. Methods: All 719 medical participants got an anonymized questionnaire asking for supply of crural ulcer in their institution. Results: The recurrent 66 questionnaires (9.2%) were filled by colleagues from practice or hospital, mostly surgeons, dermatologists, phlebologists and vascular surgeons. As basic diagnostics vein doppler (56.1%), duplex (75.8%) or measurement of brachial-ankleindex (83.3%) were performed. Compression therapy is used in all institutions. Mainly used wound dressings are polyurethane foam dressings, alginates, hydrocolloids and silver dressings. About 2/3 conduct surgical therapy of ulcers. Conclusion: Supply of ulcus cruris by the participants of the annual meeting of the DGP corresponds mainly, but not in all aspects to the guidelines. Further efforts for a spread of the guidelines are necessary.

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