Delayed mating reduces reproductive output of female European grapevine moth, Lobesia botrana (Lepidoptera: Tortricidae)

2002 ◽  
Vol 92 (3) ◽  
pp. 241-249 ◽  
Author(s):  
L.M. Torres-Vila ◽  
M.C. Rodríguez-Molina ◽  
J. Stockel
Keyword(s):  
Reproductive Output ◽  
Mating Disruption ◽  
Lobesia Botrana ◽  
Ecological Perspective ◽  
Oviposition Period ◽  
Reproductive Efficiency ◽  
Female Longevity ◽  
Grapevine Moth ◽  
Old Females ◽  
Female Weight

AbstractVirgin females of Lobesia botrana Denis & Schiffermüller were mated at ages of 1, 3, 5, 8, 12 and 16 days and the effect of mating delay on reproductive output assessed. Delayed mating did not affect female mating success but fertilization was reduced in 16-day-old females. Increased mating delays substantially affected daily oviposition pattern and resulted in a significant reduction of both fecundity and fertility, so that mean number of viable eggs laid decreased from 150 to 22 in 1- and 16-day-old mated females, respectively. Heavier females were more constrained than lighter ones by mating delays and female reproductive efficiency (no. viable eggs/female body weight) was also significantly reduced. Female longevity significantly increased and oviposition period gradually declined with mating delay. The number of viable eggs was positively correlated with both female weight and oviposition period; female longevity and female weight were also significantly correlated. However, the significance of these correlations declined with increased mating delay. Results overall indicated that mating delay drastically reduces female L. botrana reproductive output. The implications of delayed mating of females are discussed from an ecological perspective in relation to L. botrana control using mating disruption.

Effect of delayed mating on reproductive biology of the Oriental fruit moth (Lepidoptera: Tortricidae)

2001 ◽  
Vol 133 (2) ◽  
pp. 219-227 ◽  
Author(s):  
H.W. Fraser ◽  
R.M. Trimble
Keyword(s):  
Survival Rate ◽  
Reproductive Biology ◽  
Mating Disruption ◽  
Oriental Fruit Moth ◽  
Oviposition Period ◽  
Egg Hatch ◽  
Female Longevity ◽  
Successful Control ◽  
Black Head ◽  
Egg Fertility

AbstractThe effect of delayed mating on the reproductive biology of females of the Oriental fruit moth, Grapholita molesta (Busck), was studied in the laboratory. Expected reproduction, defined as t-th day survival rate × percent successful mating × total viable eggs, was reduced by 13, 36, and 74%, respectively, after a 2-, 5-, and 10-d delay in pairing with a male compared with females that were paired with a male on their day of emergence. Female fertility (percentage of females laying fertile eggs), fecundity (total number of eggs laid), egg fertility (percentage of eggs developing to black head stage), and egg hatch (percentage of eggs hatching) were reduced by delays in mating. The pre-oviposition period of females mated within 24 h of emergence was longer than that of females mated 2, 5, or 10 d after emergence. The duration of the oviposition period declined with delays in mating. Female longevity increased with delays in mating and was greatest in virgin females. The number of eggs laid per day was similar in females paired with a male 2, 5, and 10 d after their emergence. Commencing 2 d after pairing, females paired on their day of emergence exhibited a daily oviposition rate similar to that of females paired 2–10 d after emergence. These observations suggest that the successful control of the Oriental fruit moth using sex-pheromone-mediated orientation disruption (mating disruption) is more likely accomplished by preventing mating than by delaying mating.

Delayed mating in tortricid leafroller species: simultaneously aging both sexes prior to mating is more detrimental to female reproductive potential than aging either sex alone

2008 ◽  
Vol 99 (3) ◽  
pp. 245-251 ◽  
Author(s):  
L.L. Stelinski ◽  
L.J. Gut
Keyword(s):  
Reproductive Output ◽  
Reproductive Potential ◽  
Virgin Female ◽  
Oviposition Period ◽  
Female Reproduction ◽  
Argyrotaenia Velutinana ◽  
Female Age ◽  
Female Mating ◽  
Opposite Sex ◽  
Female Longevity

AbstractThe effect of delayed mating on reproductive potential, longevity and oviposition period of female redbanded leafroller,Argyrotaenia velutinana(Walker) and Pandemis leafroller,Pandemis pyrusanaKearfott, was investigated in the laboratory. Virgin female or male moths of each species were held for 1, 2, 4, 6 or 10 days prior to pairing with one-day-old virgin conspecifics of the opposite sex. In addition, reproductive potential was assessed when both sexes of each species were aged for those periods prior to pairing. The expected reproduction of femaleA. velutinanawas reduced by 34, 53, 71 and 81% for 2, 4, 6 and 10-day delays in female mating, respectively. ForP. pyrusana, expected reproduction was reduced by 47, 74, 85 and 93% for 2, 4, 6 and 10-day delays in female mating, respectively. Increasing male age at mating in both species had a lesser effect on female reproductive output compared with increasing female age at mating. As maleA. velutinanaage at mating increased, the expected reproduction of femaleA. velutinanawas reduced by 15, 45, 54 and 70% for 2, 4, 6 and 10-day delays, respectively. Comparing maleP. pyrusanaof various ages at mating, expected reproduction was reduced by 14, 42, 64 and 79% for 2, 4, 6 and 10-day delays in mating, respectively. The decrease in female reproduction when both sexes were aged prior to mating was higher than when either sex alone was aged prior to pairing with a one-day-old virgin of the opposite sex. The expected reproduction of femaleA. velutinanawas reduced by 60, 83, 96 and 98% for 2, 4, 6 and 10-day delays in mating of both sexes, respectively. Only 7.5% of female eggs hatched when both sexes ofA. velutinanawere aged ten days prior to mating. When simultaneously aging both sexes ofP. pyrusanaprior to mating, expected reproduction was reduced by 71, 93, 96 and 99% for 2, 4, 6 and 10-day delays in mating, respectively. NoP. pyrusanaeggs hatched after a ten-day delay of mating for both sexes. For both species, female longevity increased and duration of oviposition period decreased with increasing female age at mating. Our results demonstrate that delayed mating in both females and males negatively affects female reproductive output in both species and that simultaneous aging of both sexes prior to mating has a greater effect than aging either sex alone. Our results suggest that laboratory studies that have paired aged females or aged males with conspecifics of optimal reproductive maturity have likely underestimated the effects of delayed mating on reproductive output.

scholarly journals Airborne Pheromone Quantification in Treated Vineyards with Different Mating Disruption Dispensers against Lobesia botrana

Insects ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 289
Author(s):  
Aitor Gavara ◽  
Sandra Vacas ◽  
Ismael Navarro ◽  
Jaime Primo ◽  
Vicente Navarro-Llopis
Keyword(s):  
Mating Disruption ◽  
Lobesia Botrana ◽  
Spectroscopic Methods ◽  
Concentration Profiles ◽  
European Grapevine Moth ◽  
Pheromone Concentration ◽  
Crop Cycle ◽  
Competitive Mechanisms ◽  
Grapevine Moth ◽  
Airborne Pheromone

Mating disruption (MD) is widely used against the European grapevine moth (EGVM), Lobesia botrana (Denis and Schiffermüller; Lepidoptera: Tortricidae), by installing passive dispensers or aerosol devices. The present work reports a new sampling and quantification methodology to obtain absolute data about field airborne pheromone concentration based on air samplings and sensitive chromatographic-spectroscopic methods. Samplings were performed in fields treated with passive dispensers or aerosol devices at different moments throughout the crop cycle to study how they act and how the disruption is triggered. Moreover, pheromone adsorption and releasing capacity of vine leaves were studied to elucidate their role in the disruption. Although both types of dispensers were effective in limiting the damage inflicted by EGVM, they performed differently and provided different airborne pheromone concentration profiles. Results also proved that leaves were able to adsorb and release part of the airborne pheromone acting as subsequent and additional pheromone sources. This fact could explain the different concentration profiles. Moreover, our results suggest that lower pheromone emission than that of the current passive dispensers still could provide an adequate performance in the field. Competitive mechanisms involved in MD using both dispensers, the dynamics of the airborne pheromone throughout the time and the importance of the canopy are discussed.

Vine phenological stage during larval feeding affects male and female reproductive output of Lobesia botrana (Lepidoptera: Tortricidae)

1999 ◽  
Vol 89 (6) ◽  
pp. 549-556 ◽  
Author(s):  
L.M. Torres-Vila ◽  
M.C. Rodríguez-Molina ◽  
R. Roehrich ◽  
J. Stockel
Keyword(s):  
Body Weight ◽  
Reproductive Output ◽  
Lobesia Botrana ◽  
Crop Damage ◽  
Reproductive Efficiency ◽  
Larval Feeding ◽  
Phenological Stage ◽  
Semisynthetic Diet ◽  
Larval Food ◽  
Potential Factor

AbstractThe effect of vine phenological stage during larval feeding on the reproductive output of Lobesia botrana (Denis & Schiffermüller) adults was assessed. Larvae were reared under field conditions on vine inflorescences, unripe or ripe berries simulating the first, second and third insect generations respectively. The resulting adults showed significant differences in body weight, longevity and reproductive output as measured by oviposition period, total fecundity and reproductive efficiency (viable eggs/body weight) for females, and spermatophore number and volume of the first spermatophore for males. Viable egg number was positively correlated with female body weight for all treatments but male reproductive efficiency (spermatophores/body weight) was not. The reproductive output of females from larvae reared on a standard semisynthetic diet was comparable to that of females reared on ripe berries whereas males showed a higher reproductive output when reared on semisynthetic diet. These results clearly show that data obtained from insects reared on artificial diet cannot be extrapolated to ‘field-derived’ adults. The results suggest that the variation in L. botrana reproductive output due to the larval food source should be taken into account as a potential factor affecting insect population dynamics. It is suggested that different intervention thresholds, such as those based on pheromone catches, may be needed for each of the three moth generations, to compensate for the increased fecundity and potential to cause larger amounts of crop damage of later generations.

scholarly journals Grape variety affects larval performance and also female reproductive performance of the European grapevine moth Lobesia botrana (Lepidoptera: Tortricidae)

2006 ◽  
Vol 96 (2) ◽  
pp. 205-212 ◽  
Author(s):  
J. Moreau ◽  
B. Benrey ◽  
D. Thiéry
Keyword(s):  
Host Plant ◽  
Adult Emergence ◽  
Lobesia Botrana ◽  
Larval Performance ◽  
European Grapevine Moth ◽  
Wild Grape ◽  
Larval Host ◽  
Fitness Index ◽  
Grapevine Moth

AbstractFor insect herbivores, the quality of the larval host plant is a key determinant of fitness. Therefore, insect populations are supposed to be positively correlated with the nutritional quality of their host plant. This study aimed to determine if and how different varieties of grapes (including the wild grape Lambrusque) affect both larval and adult performance of the polyphagous European grapevine moth Lobesia botrana (Denis & Schiffermüller). Significant differences were found in larval development time, but not in pupal mass, adult emergence rate, or sex ratio. Although the fecundity of females is not different among varieties, females fed on some varieties produced eggs of different sizes which are correlated to their fertility. Thus, females adapt resource allocation to eggs depending on their diet as larvae. Using a fitness index, the average reproductive output was found to be highest for females reared on cv. Chardonnay. Females reared on wild grape produced a fitness index identical to the cultivated grapes. However, Lambrusque and Gewurztraminer separate themselves from the cultivated varieties according to our discriminant analyses. It is emphasized, through this study, that cultivars fed on by larvae should be considered in the population dynamics of L. botrana and that egg number is insufficient to determine host plant quality.

scholarly journals Climate warming effects on grape and grapevine moth (Lobesia botrana ) in the Palearctic region

2017 ◽  
Vol 20 (2) ◽  
pp. 255-271 ◽  
Author(s):  
Andrew Paul Gutierrez ◽  
Luigi Ponti ◽  
Gianni Gilioli ◽  
Johann Baumgärtner
Keyword(s):  
Climate Warming ◽  
Lobesia Botrana ◽  
Palearctic Region ◽  
Grapevine Moth
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