Field evaluation of synthetic sex pheromone traps for the cocoa mirid Sahlbergella singularis (Hemiptera: Miridae)

2011 ◽  
Vol 67 (6) ◽  
pp. 672-676 ◽  
Author(s):  
Raymond J Mahob ◽  
Régis Babin ◽  
Gerben M ten Hoopen ◽  
Luc Dibog ◽  
Yede ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Field Evaluation ◽  
Pheromone Traps ◽  
Sahlbergella Singularis ◽  
Sex Pheromone Traps ◽  
Synthetic Sex Pheromone

scholarly journals Design and placement of synthetic sex pheromone traps for cacao mirids in Ghana

2018 ◽  
Vol 38 (02) ◽  
pp. 122-131 ◽  
Author(s):  
J.E. Sarfo ◽  
C.A.M. Campbell ◽  
D.R. Hall
Keyword(s):  
Sex Pheromone ◽  
Sticky Trap ◽  
Mass Trapping ◽  
Pheromone Traps ◽  
Water Trap ◽  
Sahlbergella Singularis ◽  
Sex Pheromone Traps ◽  
Pheromone Components ◽  
Synthetic Sex Pheromone ◽  
Large Water

AbstractCacao mirids (Sahlbergella singularis,Distantiella theobromaandBryocoropsis laticollis) were captured in pheromone traps releasing a 2:1 blend of the sex pheromone components of the two first named species in a series of five experiments on cacao (Theobroma cacao) plantations in Ghana. A total of 835 cacao mirids were caught, all male, 95% of which wereS. singularis, 3%D. theobromaand 2%B. laticollis.Two sticky trap and two water trap designs made from locally available materials were as effective for capturingS. singularisand total mirids as the best sticky trap from previously reported studies. Coating the outer surface of a large water trap with sticker increased the catch 4.4×, and 2.7× for a cylindrical sticky trap. Sticker on the outside of the water trap also increased the inside catch ofS. singularisby 76% and total mirids by 71%. The numbers ofS. singularisandD. theobromatrapped increased with increasing trap elevation and were highest around canopy level. Those traps caught an average 12× more mirids than traps at 1.8 m, the height recommended currently. Therefore, large water traps coated with sticker and aligned with the cacao canopy should raise the current capture rates of pheromone traps for cacao mirids about 50×, which may be sufficient for effective pest management by mass trapping without synthetic insecticides.

scholarly journals Visual cues from different trap colours affect catches of Sahlbergella singularis (Hemiptera: Miridae) in sex pheromone traps in Cameroon cocoa plantations

2020 ◽  
Vol 127 ◽  
pp. 104959
Author(s):  
Hermine C. Mahot ◽  
Joseph R. Mahob ◽  
David R. Hall ◽  
Sarah E.J. Arnold ◽  
Apollin K. Fotso ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Visual Cues ◽  
Pheromone Traps ◽  
Sahlbergella Singularis ◽  
Sex Pheromone Traps

FIELD EVALUATION OF SYNTHETIC SEX PHEROMONE ATTRACTANTS FOR THE EYE-SPOTTED BUD MOTH (LEPIDOPTERA: OLETHREUTIDAE) AND THREE LEAFROLLER SPECIES (LEPIDOPTERA: TORTRICIDAE)

1978 ◽  
Vol 110 (8) ◽  
pp. 847-852 ◽  
Author(s):  
C. R. MacLellan
Keyword(s):  
Sex Pheromone ◽  
Species Identification ◽  
Sex Pheromones ◽  
Field Evaluation ◽  
Pheromone Traps ◽  
Choristoneura Rosaceana ◽  
Synthetic Sex Pheromone ◽  
Fruit Damage ◽  
Pandemis Limitata ◽  
Archips Argyrospilus

AbstractSynthetic sex pheromones were evaluated in apple orchards against the pests Spilonota ocellana (D. & S.), Archips argyrospilus (Walker), Choristoneura rosaceana (Harris), and Pandemis limitata (Robinson). Significant correlations between spring larval counts and captures of males in summer in pheromone traps occurred only at moderate to high population levels. Correlations between captures of males in summer and fruit damage occurred only with S. ocellana. The attractants for S. ocellana, A. argyrospilus, and C. rosaceana appear satisfactory but that for P. limitata, possibly due to species identification uncertainty and low populations, requires further evaluation.

Field evaluation of gossyplure, the synthetic sex pheromone of Pectinophora gossypiella (saund.) (Lepidoptera, Gelechiidae) in Malawi

1976 ◽  
Vol 66 (2) ◽  
pp. 267-278 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Field Evaluation ◽  
Field Trials ◽  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Pheromone Traps ◽  
Pest Species ◽  
Polyethylene Vial ◽  
Angoumois Grain Moth ◽  
Sex Pheromone Traps

AbstractThe synthetic sex attractant of the pink bollworm of cotton, Pectinophora gossypiella (Saund.) (Lepidoptera, Gelechiidae), is a mixture of (Z, Z) and (Z, E)-7, 11-hexadecadien-l-ol acetate, referred to as gossyplure (Hummel et al., 1973). Field trials in the Lower Shire Valley, Malawi, have shown that of various mixtures tested, 55–60% of the (Z,Z) isomer in a mixture of the two acetates gives maximum field attraction. The catches of both pink bollworm males and males of the red bollworm of cotton, Diparopsis castanea Hmps., in pheromone traps are not affected by the release of mixtures of the pheromones of both species together. Dual-purpose sex pheromone traps may therefore be used to monitor both pest species at the same time. A simple omnidirectional flat disc trap is as efficient in trapping pink bollworm males as more complex designs. Release of gossyplure from a sealed 2·5 ml polyethylene vial or from a Zoecon beem-polyethylene vial is more efficient than from narrow-bore teflon capillary. Presence of the antioxidant 2,6-di-tert-butyl-P-cresol at 8·4% w/w gossyplure does not increase the attractive life of the pheromone in the field. Considerable numbers of the Angoumois grain moth Sitotroga cerealella (Ol.) (Tineidae), together with a new species of gelechiid, were occasionally caught by gossyplure lures in cotton fields. Catches of pink bollworm are not influenced by moonlight or trap colour but are significantly influenced by trap area. Maximum catches of males occur between midnight and 04.00 h in June and between 01.00 and 05.00 h in August.

Female sex pheromone release and the timing of male flight in the red bollworm Diparopsis castanea Hmps. (Lepidoptera, Noctuidae), measured by pheromone traps

1976 ◽  
Vol 66 (2) ◽  
pp. 219-241 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Control Programme ◽  
Pheromone Traps ◽  
Female Sex Pheromone ◽  
Female Sex ◽  
Pheromone Release ◽  
Sex Pheromone Traps ◽  
Sex Pheromone Gland ◽  
Synthetic Sex Pheromone ◽  
Lepidoptera Noctuidae

AbstractThe female sex pheromone gland of Diparopsis castanea Hmps. consists of modified intersegmental tissue between the eighth and ninth abdominal segments. Glands contain an average of 12·73 ×10–3 μg of pheromone consisting of 80·4±2·0% trans-9, 11-dodecadien-l-yl acetate (range 72·7–86·7%) and 19·6±2·0% 11-dodecen-l-yl acetate (range 13·3–27·3%). Although no significant correlation exists between female body weight and pheromone content of the gland, the duration of sex pheromone release over the lifespan of a female is positively correlated with its weight on emergence. Six behavioural steps may be recognised in the precopulatory behaviour of females but the frequency and duration of sex pheromone release is strongly influenced by both temperature and light intensity. At 25°C females typically ‘call’ on two or more occasions for 41–50% of the night, calling commencing earlier at cool (13·4°C) temperatures than at moderate (19·4°C) or warm (25·0°C) temperatures. Calling by mated females increases considerably from four to five nights after mating but is typically of shorter duration than for virgins. The dispersal flight of Diparopsis males in cotton crops commences almost immediately after sunset and before the end of dusk, with peak male catches in sex pheromone traps occurring earlier in the cooler months of May and June (20.00–22.00 h) than in November (02.00–04.00 h). The Diparopsis synthetic sex pheromone, dicastalure, traps a greater proportion of males and females both earlier and later in the night than virgin females and this ‘timing advantage’ may be important in a pheromone control programme based on disruption of communication between the sexes.

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