Effect of Humidity on Fecundity and Egg Incubation of<i>Frankliniella bispinosa</i>and<i>Frankliniella occidentalis</i>(Thysanoptera: Thripidae)

Garrick, Tamika A.; Liburd, Oscar E.; Funderburk, Joe

doi:10.1653/024.099.0324

Cited by 9 publications

(4 citation statements)

References 18 publications

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“…Humidity variation is defined as causing changes in insect population density, as observed in the present work. This climatic factor affecting the thrips population agrees with reports of the fecundity rate, egg incubation period, success of the pupal stage, survival rate, flight activity, and insect development period being modified by moisture [41,42,43,44] .…”

Section: Resultssupporting

confidence: 90%

Population dynamics of thrips (Insecta: Thysanoptera) in cut chrysanthemum cultivated under photoselective screens

Assis¹,

Aguiar²,

Holtz³

et al. 2023

J. Entomol. Zool. Stud.

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The chrysanthemum is one of the main ornamental species in the world, having high relevance in the market of cut flowers and potted plants. Thrips are among the main pests of the chrysanthemum crop, causing direct and indirect damage to plants. The objective of this work was to evaluate the influence of photoselective screens and climatic factors on the population density of different species of thrips chrysanthemum. The study was carried out in the experimental area of the Instituto Federal do Espírito Santo -Campus Itapina, in a randomized complete block design, with split plots in time. The experiment was established in 3 blocks of 12 m in length, with plots of 3 m in length containing the different photoselective screens (red, silver, and black) and the control treatment (open field), which consisted of the primary factor. Repeated evaluations in time (0, 15, 30, 45, and 60 d) consisted of the secondary factor. Data were submitted to Tukey's test (p < 0.05) and the multivariate technique of principal component analysis (PCA). The mean of the thrips population at 60 days was statistically higher. The climatic variables rain and average humidity showed a highly significant negative correlation with the population fluctuation of the pest. Black, red, and silver photoselective screens promote significant reductions in thrips populations in chrysanthemums of the Zembla variety in the environmental conditions of southeastern Brazil.

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Section: Resultssupporting

confidence: 90%

Population dynamics of thrips (Insecta: Thysanoptera) in cut chrysanthemum cultivated under photoselective screens

Assis¹,

Aguiar²,

Holtz³

et al. 2023

J. Entomol. Zool. Stud.

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“…Fatnassi et al [20] found the dependence of thrips infestation on micro-climate factors including humidity in a rose greenhouse. More interestingly, Garrick et al [21] suggested that higher fecundity of native Frankliniella bispinosa (Morgan) at high humidity level can enhance biotic resistance against invasive F. occidentalis. However, no comparative data have been published on the interactive effect of temperature and RH on F. intonsa and F. occidentalis.…”

Section: Introductionmentioning

confidence: 99%

Relative susceptibility to pesticides and environmental conditions of Frankliniella intonsa and F. occidentalis (Thysanoptera: Thripidae), an underlying reason for their asymmetrical occurrence

Bhuyain

Lim

2020

PLoS ONE

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To explain the asymmetrical abundance of native Frankliniella intonsa (Trybom) (Thysanoptera: Thripidae) and invasive Frankliniella occidentalis (Pergande) in the fields, we examined differential susceptibility to pesticides and environmental conditions, i.e., nine combinations of temperatures and relative humidities (RHs). We found adult female F . intonsa to be more susceptible to most of the tested insecticides as compared to F . occidentalis . Chlorfenapyr was most toxic to both thrips’ species. In the evaluation of environment conditions in the adult stage, F . intonsa survived 2.5 and 2.4-fold longer as RH increased at 20 and 25 °C, respectively, whereas F . occidentalis survived 1.8 and 1.6-fold longer, respectively. In both pupal and larval stage, no significant effect of interaction of temperatures and RHs was found between the two species. In conclusion, the insecticides tested differed considerably in their species-specific toxicity, and F . intonsa was generally more susceptible to the insecticides, while at the same time survivorship was better at higher RH conditions than F . occidentalis . Thus, differences in the relative susceptibility to changing environmental conditions, especially humidity, may be an underlying mechanism for the recent dominance of F . intonsa over F . occidentalis in the strawberry plastic greenhouse in Korea.

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“…The fluctuation of life cycle period in different seasons such as shorter during summer and longer in winter indicated the role of weather parameters in their growth and development which was found similar with other thrips species namely Thrips tabaci, Frankliniella bispinosa etc. on cotton, mung bean and green bean respectively [30][31][32][33]. However, during present investigation apart from seasonality specific effect of temperature and humidity was not measured for each developmental stage.…”

Section: Discussionmentioning

confidence: 63%

Bionomics and Damage Estimation of Dolichothrips indicus (Hood, 1919) (Thysanoptera: Phlaeothripidae) in a New Host in Tamil Nadu, India

Ganguly,

Jacob

2024

UPJOZ

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Bionomics and damage of a polyphagous and an enigmatic phlaeothripid insect, Dolichothrips indicus (Hood, 1919) has been described on a profitable and popular agro-forestry crop Melia dubia (Malabar Neem) in Tamil Nadu, a southern state of India. This little-known target thrips species, previously known to feed flowers and shoots of different plant families has come out as a pest of M. dubia which is persistent in nurseries and regular in plantations. Molecular aided taxonomic identification of D. indicus performed during the study revealed their highest compatibility with the type specimens of D. rambhutanae (Ananthakrishnan) and D. pumilus (Priesner). Population assessment and mapping of D. indicus for over a year showed nil to very high population. Population density with individuals <50 had occurred in 3 out of total 23 study locations comprised of 13 districts of Tamil Nadu triggered by positively correlated (r=0.384) relative humidity. Whereas other weather parameters did not impact the population significantly. Alteration in food plant selection from Ailanthus excelsa shoots feeder to ravenous shoot and leaf feeder of host M. dubia was documented. Infected leaves of M. dubia encountered the development of boundless branched stellate trichomes on the abaxial surface. The feeding and egg laying damage of D. indicus on M. dubia resulted the loss of average 52% of chlorophyll content and 80% of total leaf lamina compared to the healthy one after heavy infestation. Other secondary infection symptoms seen in the adaxial surface of leaves during infestation are yet to be investigated.

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Effect of Humidity on Fecundity and Egg Incubation ofFrankliniella bispinosaandFrankliniella occidentalis(Thysanoptera: Thripidae)

Cited by 9 publications

References 18 publications

Population dynamics of thrips (Insecta: Thysanoptera) in cut chrysanthemum cultivated under photoselective screens

Population dynamics of thrips (Insecta: Thysanoptera) in cut chrysanthemum cultivated under photoselective screens

Relative susceptibility to pesticides and environmental conditions of Frankliniella intonsa and F. occidentalis (Thysanoptera: Thripidae), an underlying reason for their asymmetrical occurrence

Bionomics and Damage Estimation of Dolichothrips indicus (Hood, 1919) (Thysanoptera: Phlaeothripidae) in a New Host in Tamil Nadu, India

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