THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE). AN ESTIMATE OF LIGHT AND PHEROMONE TRAP EFFICIENCY BASED ON CAPTURES OF NEWLY EMERGED MOTHS

1979 ◽  
Vol 111 (9) ◽  
pp. 977-984 ◽  
Author(s):  
G.E. Bucher ◽  
G.K. Bracken
Keyword(s):  
Pheromone Trap ◽  
Limited Area ◽  
Pheromone Traps ◽  
Confidence Limits ◽  
Light Traps ◽  
Circular Arrays ◽  
Zone Of Influence ◽  
Lepidoptera Noctuidae ◽  
Light And Pheromone Traps ◽  
Bertha Armyworm

AbstractEfficiencies of light and pheromone traps were estimated from captures of moths emerging from pupae in the center of circular arrays of traps up to 200 m in radius. Light traps captured 1 insect for every 3.6 that passed through a linear meter at the trap, an efficiency factor of 0.28. This factor was constant for different insect densities. The pheromone traps were 3.5 times as efficient as light traps based on the captures of males only. The low efficiencies imply that the traps have a small zone of influence and several may be needed in a limited area to produce catches within reasonable confidence limits when populations are sparse and detection of increasing numbers has the greatest value.

SEX PHEROMONE TRAPS IN POPULATION MONITORING OF ADULTS OF THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)

1979 ◽  
Vol 111 (1) ◽  
pp. 91-95 ◽  
Author(s):  
Warren Steck ◽  
E. W. Underhill ◽  
M. D. Chisholm ◽  
C. C. Peters ◽  
H. G. Philip ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Population Monitoring ◽  
Pheromone Traps ◽  
Light Traps ◽  
Mamestra Configurata ◽  
Sex Pheromone Traps ◽  
Lepidoptera Noctuidae ◽  
Army Worm ◽  
Bertha Armyworm ◽  
Prairie Provinces

AbstractTraps baited with the sex pheromone of the bertha army worm moth, Mamestra configurata (Walker), were operated at 36 sites across the prairie provinces in 1976 and 1977. They captured ca. 15 times as many bertha moths as did light traps and were considered to constitute a useful method for detection of adults of this species.

RELATIONSHIPS AMONG PHEROMONE TRAP CATCHES OF MALE CORN EARWORM MOTHS (LEPIDOPTERA: NOCTUIDAE), EGG NUMBERS, AND PHENOLOGY IN CORN

1991 ◽  
Vol 123 (2) ◽  
pp. 271-281 ◽  
Author(s):  
M.A. Latheef ◽  
J.A. Witz ◽  
J.D. Lopez
Keyword(s):  
Cross Correlation ◽  
Pheromone Trap ◽  
Corn Earworm ◽  
Pheromone Traps ◽  
Mediating Effects ◽  
Large Numbers ◽  
Cross Correlation Analysis ◽  
Time Differential ◽  
Trap Catches ◽  
Lepidoptera Noctuidae

AbstractRelationships among catches of corn earworm moths, Helicoverpa (= Heliothis) zea (Boddie), in pheromone traps, numbers of corn earworm eggs, and corn ears with fresh silks were investigated in eight corn fields during a 2-year period in Brazos River Valley, Texas. Cross-correlation analysis indicated that the catches of corn earworm moths in pheromone traps were closely associated with egg numbers in seven of eight fields with a time differential varying between −1 to +2 days. Cross-correlation peaks for new silks versus eggs occurred with time differentials being mostly positive, indicating that corn earworm egg numbers reached a maximum after corn produced large numbers of fresh silks on ears.There was a weak but significant linear relationship between egg numbers and corn earworm catches in pheromone traps when corn was in the whorl stage of growth. A stepwise regression model of the form: log (eggs/ha + 1) = 3.71 + 0.22*log(S + 1)*log(T + 1) − 0.3*log(S + 1), where S = numbers of corn ears with new silks per hectare, and T = mean corn earworm moths per trap, explained 52.5% of the variance. These results emphasize the mediating effects of fresh silks on corn earworm oviposition on corn.

scholarly journals Appropriate Number of Sex Pheromone Trap for Monitoring Spodoptera exigua Hubner (Lepidoptera: Noctuidae) Moths on Shallot Field

2020 ◽  
Vol 24 (2) ◽  
pp. 229
Author(s):  
Dian Lestari ◽  
F. X. Wagiman ◽  
Edhi Martono
Keyword(s):  
Experimental Design ◽  
Sex Pheromone ◽  
Spodoptera Exigua ◽  
Pheromone Trap ◽  
Pheromone Traps ◽  
Single Factor ◽  
Pest Infestation ◽  
Sex Pheromone Traps ◽  
Lepidoptera Noctuidae ◽  
Single Factor Experiment

The research was carried out to determine the appropriate number of sex pheromone traps for monitoring the Spodoptera exigua moths in shallot crop which was grown in Yogyakarta Special Territory, Bantul Regency (Samas). This research was conducted in August until September 2016. Sex pheromone trap was arranged on shallot aged  3 weeks after planting. Sex pheromone trap with hexadecenat tetra asetat ingredients was placed on sticky yellow trap. This research  used RCBD experimental design with single factor experiment namely the number of trap i.e. 3, 5, 6, 8 units/2.000 m2 with sex pheromone, and  three traps without sex pheromone as control. Each treatment was repeated 5 times so  125 samples of experiments were obtained. Observation was made by counting the number of moths caught in sex pheromone trap. The result of observation was analysed  with analysis of variance (ANOVA) and DMRT α 5.0%. The results show that the appropriate number of trap to monitor the pest infestation was 3 units/2.000 m2.

scholarly journals Monitoring and detection of the swede midge (Diptera: Cecidomyiidae)

2007 ◽  
Vol 139 (5) ◽  
pp. 700-712 ◽  
Author(s):  
Rebecca H. Hallett ◽  
Sheila A. Goodfellow ◽  
James D. Heal
Keyword(s):  
Population Dynamics ◽  
Pheromone Trap ◽  
Pheromone Traps ◽  
Light Traps ◽  
Sticky Traps ◽  
Incandescent Light ◽  
Emergence Traps ◽  
Swede Midge ◽  
Contarinia Nasturtii

AbstractIn 2002, two types of light traps were compared against sticky yellow cards for efficiency and selectivity in capturing adult swede midge Contarinia nasturtii (Kieffer) (Diptera: Cecidomyiidae). Incandescent light traps were more efficient at capturing swede midge than were sticky traps. Incandescent light traps were more selective than blacklight traps and required less time for processing of samples and identification of captured midges. Emergence (2003 and 2004) and pheromone (2004) traps were used to assess swede midge population dynamics. Captures from emergence traps indicate up to five overlapping emergence events for swede midge each year. Emergence traps captured swede midge earlier in the season than pheromone traps, but pheromone-trap captures continued later in the season than those in emergence traps. Pheromone traps are small and portable, easy to maintain, and capture significantly more swede midge than emergence traps.

The influence of behaviour modifying chemicals on mating success of the red bollworm Diparopsis castanea Hmps. (Lepidoptera, Noctuidae) in Malawi

1976 ◽  
Vol 66 (2) ◽  
pp. 279-300 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Sexual Attraction ◽  
Practical Method ◽  
Pheromone Trap ◽  
Cotton Field ◽  
Field Cage ◽  
Synthetic Sex Pheromone ◽  
Trap Catches ◽  
First Time ◽  
Lepidoptera Noctuidae

AbstractThe synthetic sex pheromone (dicastalure) of the red bollworm of cotton, Diparopsis castanea Hmps., in Central and Southern Africa, and an inhibitor of male sexual attraction (trans-9-dodecenyl acetate,=IIA), were used in an enclosed 0·2 ha cotton field-cage to reduce successful female matings. Over one month dicastalure at 21·0 and 42·3 g/ha produced average reductions in mating of 47·9% and 72·5% respectively and 37·9 g IIA/ha produced an overall reduction in mating of 71·5%, or 79·5% in released moth populations, over the same period. The proportion of virgin females present in disruption situations was significantly greater than in untreated populations and was density-independent for moth populations of up to 2 200/ha. The proportion of fertile eggs in disruption situations was correspondingly reduced to 30·2% from an average of 67·9% in control cycles. Reduction in sex pheromone trap catches is an unsatisfactory indicator of the extent to which males are prevented from inseminating females and considerably over-estimates the true degree of disruption. This is the first time that a naturally occurring inhibitor has been used successfully to disrupt mating in a field population of insects and it indicates the potential of the method for the control of high density pest populations in cotton. However, use of polyethylene dispensing mechanisms similar to those used in the field-cage disruption experiments would be unsuitable as a practical method of dispensing behaviour modifying chemicals and it is suggested that, for suitably controlled release of such chemicals, currently available microencapsulation technology offers the best prospects.

DENSITY, PARASITISM, AND DISEASE INCIDENCE OF LARVAE OF THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA WALKER (LEPIDOPTERA: NOCTUIDAE), IN MANITOBA, 1973–1986’

1988 ◽  
Vol 120 (5) ◽  
pp. 401-413 ◽  
Author(s):  
W. J. Turnock
Keyword(s):  
Disease Incidence ◽  
Population Declines ◽  
Mamestra Configurata ◽  
Trends Over Time ◽  
Nuclear Polyhedrosis ◽  
Physiographic Regions ◽  
River Plain ◽  
Swan River ◽  
Lepidoptera Noctuidae ◽  
Bertha Armyworm

AbstractPopulations of larvae of the bertha armyworm, Mamestra configurata Wlk., in four physiographic regions of Manitoba showed similar trends over time: a decline from the outbreak of 1971–1972 to very low densities in 1975–1977, an increase to a peak during the years 1979–1981, and a subsequent decline. During the period of peak larval populations, brief (1 or 2 years) outbreaks [at least some fields with > 20 larvae per square metre) occurred at five locations in two regions, the Swan River Plain and the Valley River Plain, but not in the Western Uplands or the Manitoba Lowlands. In the first two regions, larval densities rose rapidly (from < 1.6 to > 13.8/m2) in 1 year. Although the general trend of population density was similar, there were differences in density among and within regions, and in the timing, severity, and duration of peak populations. Two parasitoids (Banchus flavescens Cress., Athrycia cinerea (Coq.)) and two pathogens (a nuclear polyhedrosis virus (NPV) and fungi of the Entomophthorales) occurred regularly in larval populations. Of these, B. flavescens had the highest constancy among collections and may help to keep bertha armyworm populations at low densities. NPV was rarely found among larvae from low-density populations but appeared in all populations that reached outbreak levels. No single biotic agent could be associated with the population declines because of multiple parasitism and the difficulty in partitioning mortality when only a single sample could be taken. The rapid increase of bertha armyworm larvae from very low to outbreak levels in 1 year will prevent predictions of outbreaks from being based on larval densities in the preceding year.

scholarly journals Evaluation of Pheromone Lure as Mass-Trapping Tools for Western Flower Thrips

2012 ◽  
Vol 69 (1) ◽  
Author(s):  
Anca Dafina COVACI ◽  
Ion OLTEAN ◽  
Aurelia POP
Keyword(s):  
Adult Male ◽  
Management Strategies ◽  
Western Flower Thrips ◽  
Pheromone Trap ◽  
Mass Trapping ◽  
Pheromone Traps ◽  
Headspace Volatiles ◽  
Flower Thrips ◽  
Sternal Glands ◽  
Greenhouse Cucumber

Frankliniella occidentalis  (Pergande) (Thysanoptera: Thripidae) adult male has sternal glands whose role is to produce pheromones. It is known that there are two major components in the headspace volatiles of thrips adult male that are not present in the headspace volatiles of adult female. Those components, (R)-lavandulyl acetate and neryl (S)-2-methylbutanoate were synthesized for the first time in Romania by "Raluca Ripan" Institute for Research in Chemistry (Cluj-Napoca). We have tested a blend of those in the greenhouse cucumber ( Cucumis sativum ) crops of University of Agricultural Sciences and Veterinary Medicine. Period study lasted in 4 weeks. Blue sticky traps were coated with insect glue on both surfaces and a rubber septum which contained the blend was attached in the center of a side of a trap. Two traps with pheromone lure and one trap without pheromone lure were hung up to a 20 cm distance from the tip of the plant. Both female and males were trapped. We observed a higher percentage of males on pheromone trap. Our data revealed that the total number of western flower thrips caught on pheromone traps ranged between 1537 and 1941 as compared with the total number of thrips caught on control trap (1333). According to our results we conclude that pheromone traps could be effective tools for F. occidentalis mass trapping and for the use in integrated pest management strategies.

scholarly journals Flight initiation and flight activity in Prostephanus truncatus (Coleoptera: Bostrichidae)

1998 ◽  
Vol 88 (5) ◽  
pp. 545-552 ◽  
Author(s):  
D. Scholz ◽  
C. Borgemeister ◽  
R. H. Markham ◽  
H. M. Poehling
Keyword(s):  
Sex Ratios ◽  
Breeding Site ◽  
Pheromone Trap ◽  
Flight Activity ◽  
Prostephanus Truncatus ◽  
Pheromone Traps ◽  
Set Up ◽  
Trap Catches ◽  
Maize Cobs ◽  
Flight Initiation

AbstractIn an outdoor experimental set-up, the number of Prostephanus truncatus (Horn) flying from maize cobs was recorded over 38 observation weeks. Flight activity in the field was recorded for 50 weeks with three pheromone traps, each placed at c. 100–300 m from the first experimental set-up. Multiple regression analyses revealed that both flight initiation and flight activity were partly influenced by mean temperatures, but were not directly related. Flight initiation was mainly dependent on population density. An additional experiment showed that sex ratios among pheromone trap catches were not correlated with the number of beetles caught; sex ratios were female-biased throughout the year. Seasonal fluctuations in flight activity recorded with pheromone traps are mainly dependent on changes in the number and sizes of beetle populations in a given area, as well as on breeding site availability and suitability.

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