Photoperiodic Induction of Diapause in the Boll Weevil, Anthonomus grandis1234

Mangum, C. L.; Earle, N. W.; Newsom, L. D.

doi:10.1093/aesa/61.5.1125

Cited by 13 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From these results, it appears that the critical photoperiod varies with gender, falling close to 12.4 h for males and 11.8 h for females (ignoring other effects). The results of Mangum et al (1968) and Earle and Newsom (1964) are similar, which is not surprising given their work was con-ANNALS OF THE ENTOMOLOGICAL So-OF A-CA Vol. 92, no.…”

supporting

confidence: 57%

“…Greater diapause was reported under a 10-h (38-52%) than 14-h daylength (O-3%), suggesting that adults respond to short photoperiods. Mangum et al (1968) also reported a higher incidence of diapause among adults held under an II-h (49%) than under a 13-h daylength (17%)) provided immatures were reared in darkness. In a well-designed study examining the effects of photoperiod on individual life stages, Sterling (1972) found that adults have a higher incidence of diapause when held under a 11-h or 15-h daylength compared with a 13-h daylength.…”

mentioning

confidence: 90%

“…In a well-designed study examining the effects of photoperiod on individual life stages, Sterling (1972) found that adults have a higher incidence of diapause when held under a 11-h or 15-h daylength compared with a 13-h daylength. If adult boll weevils are sensitive to photoperiod, as the data suggest , Cobb and Bass 1968, Mangum et al 1968, Sterling 1972) then adult response to shortened daylengths would mask the sensitivity of immatures (Tauber et al 1986), further compromising the Earle and Newsom (1964) test and their conclusion that the critical photoperiod falls between 12 and 13 h. It seems reasonable to conclude that the critical photoperiod in the Earle and Newsom (1964) study was between 11 and 12 h.…”

mentioning

confidence: 98%

“…To define the critical photoperiod better, Mangum et al (1968) examined the diapause response of males and females to 4 daylengths between 12 and 13 h. Just over half of the males (52-57%) achieved diapause under a 12.3-h daylength. Diapause never exceeded 48% among females, even under the shortest daylength.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Diapause in the Boll Weevil (Coleoptera: Curculionidae): Seasonal Occurrence in Mississippi Populations

Wagner

Villavaso²

1999

Annals of the Entomological Society of America

View full text Add to dashboard Cite

This study examines the diapause response among boll weevils collected as immatures in squares at different times of the summer and held under simulated field photoperiods and temperatures of northern Mississippi. The percentage of adults exhibiting prediapause increased seasonally, starting with the 1st generation in July and achieving a maximal rate of 96.7% late in the year. A greater proportion of males achieved diapause than females at any given time, except late in the season when convergence in the diapause response of both sexes occurred. These results suggest that individuals in a population have different thresholds of sensitivity to the environmental cues regulating the onset of diapause. Models described the percentage of males and females in prediapause as a function of Julian date of emergence and daylength on the day of emergence. The latter models have potential application over a wide region of the Cotton Belt. Information from this study was used to suggest August starting dates for diapause control applications in the mid-Southrecommendations that subsequently were implemented in eradication programs in Alabama and Mississippi.

show abstract

supporting

confidence: 57%

mentioning

confidence: 90%

mentioning

confidence: 98%

mentioning

confidence: 99%

See 2 more Smart Citations

Diapause in the Boll Weevil (Coleoptera: Curculionidae): Seasonal Occurrence in Mississippi Populations

Wagner

Villavaso²

1999

Annals of the Entomological Society of America

View full text Add to dashboard Cite

show abstract

“…As with many tropical insects (Denlinger 1986), it undergoes an adult diapause or quiescence originally related to tropical wet and dry season, or host availability associated with those seasons, which preadapted it to overwintering in temperate zones after invasion. Although it has been long assumed that photoperiod induces boll weevil adult diapause (Brazzel and Newsom 1959, Mangum et al 1968, Wagner et al 1999, it is now clear that adult diet controls dormancy induction and that photoperiod plays little, if any, role (Lloyd et al 1967, Spurgeon and Raulston 1998, Lewis et al 2002.…”

mentioning

confidence: 99%

Effects of Photoperiod on Boll Weevil (Coleoptera: Curculionidae) Development, Survival, and Reproduction

Greenberg

Sappington

Adamczyk

et al. 2008

View full text Add to dashboard Cite

Effects of photoperiod on development, survival, feeding, and oviposition of boll weevils, Anthonomus grandis grandis Boheman, were assessed under five different photophases (24, 14, 12, 10, and 0 h) at a constant 27 degrees C temperature and 65% RH in the laboratory. Analyses of our results detected positive relationships between photoperiod and puncturing (mean numbers of oviposition and feeding punctures per day), and oviposition (oviposition punctures/oviposition+feeding punctures) activities, and the proportion of squares attacked by boll weevil females. When boll weevil females developed in light:darkness cycles, they produced a significantly higher percentage of eggs developing to adulthood than those developed in 24-h light or dark conditions. In long photoperiod (24:0 and 14:10 h), the number of female progeny was significantly higher and their development time was significantly shorter than those developed in short photoperiod (0:24 and 10:14 h). Lifetime oviposition was significantly highest at 12- and 14-h photophase, lowest at 0- and 10-h photophase, and intermediate at 24 h of light. Life table calculations indicated that boll weevil populations developed in a photoperiod of 14:10 and 12:12 (L:D) h will increase an average of two-fold each generation (Ro) compared with boll weevils developed in 24:0- and 10:14-h photoperiods and 15-fold compared with those at 0:24 h. Knowledge of the photoperiod-dependent population growth potential is critical for understanding population dynamics to better develop sampling protocols and timing insecticide applications.

show abstract

Photoperiodism and the photic environment of the pitcher-plant mosquito, Wyeomyia smithii

Bradshaw

Phillips

1979

Oecologia

View full text Add to dashboard Cite

Wyeomyia smithii Coq. (Diptera: Culicidae) overwinters as a larva in a state of diapause which is initiated, maintained, and terminated by photoperiod. Both in the dawn and in the dusk, diapausing larvae are photoperiodically most sensitive to blue light (390-450 nm) with a shoulder in response in the bluegreen and green (480-540 nm) region of the spectrum. The saturation curves for response to blue light in the dusk has a steeper slope than for response to blue-green and green light in the dusk, suggesting two distinct pigments or pigment complexes underly photoperiodic response in W. smithii.The photic environment of W. smithii during twilight is rich in yellow-green light but sufficient light is available at 390-540 nm to trigger photoperiodic response early during morning civil twilight and to sustain response until late in evening civil twilight. Comparison of action spectra with spectra of available light indicates that the zenith angles of the sun which would result in 50% response are 95°48' and 94°52' in the dawn and dusk, respectively. Using these zenith angles to approximate daylength in nature provides a resonable prediction of development in the field.The flux density of photons necessary to elicit 50% development a 454 nm is about 9×10 photons/cm s in the dawn and 3×10 photons/cm s in the dusk. This high degree of sensitivity enables W. smithii to cue to the rapidly changing light intensity which occurs around the nautical-civil twilight transition. At the same time, the chromophore is not likely to be stimulated by the light of the full moon.

show abstract

Photoperiodic Induction of Diapause in the Boll Weevil, Anthonomus grandis1234

Cited by 13 publications

References 0 publications

Diapause in the Boll Weevil (Coleoptera: Curculionidae): Seasonal Occurrence in Mississippi Populations

Diapause in the Boll Weevil (Coleoptera: Curculionidae): Seasonal Occurrence in Mississippi Populations

Effects of Photoperiod on Boll Weevil (Coleoptera: Curculionidae) Development, Survival, and Reproduction

Photoperiodism and the photic environment of the pitcher-plant mosquito, Wyeomyia smithii

Contact Info

Product

Resources

About