Biological parameters of onion thrips, Thrips tabaci Lindeman on onion cultivars

Moraiet, Maher Ahmed; Ansari, Mohd. Samar; Basri, Rabiya

doi:10.1515/jppr-2017-0016

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…These results support the results of Gill, et al (2015) who stated that the dry and hot weather can lead to an increase in the populations of T. tabaci and the severity of thrips injury to onion and other crops. Also, the current results confirm that the nymph stage was more affected by the weather factors than adult stage as indicated by with Hendawy, et al, (2011) and Moraiet and Ansari, (2014). The findings of Hamdy and Salem, (1994) (relatively high temperature have been associated with increase in onion thrips population, while high relative humidity and rainfall reduce thrips population) are consistent to our results.…”

Section: Influence Of Abiotic Factors On Population Dynamics Of Onion Thrips T Tabaci In Onion Plantssupporting

confidence: 93%

Efficiency of Some Chemical and Bio-Insecticides Against Onion Thrips, Thrips Tabaci Lindeman (Thysanoptera: Thripidae)

Khozimy

Abuzeid

Darwish

2021

Alexandria Science Exchange Journal

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Onion thrips, Thrips tabaci (Thysanoptera: Thripidae) is one of the main problems and yields limiting factors in the onion fields (Allium cepa L.). In the present work, an effort was made to study the relative susceptibility of different onion cultivars to infestation with the onion thrips, evaluation of some chemical and bio-insecticides against T. tabaci and to study the effect of meteorological factors on its population density. The results showed that T. tabaci infest all the tested cultivars more or less, however cultivar Red Giza showed to be the most tolerant against T. tabaci infestation among the other cultivars. Giza 6 was the most susceptible among the cultivars followed by Beheri, Giza 20 and finally White Giza. However, there were no significant different among the White Giza and Red Giza cultivars. The tested insecticides can be arranged according to their efficacy against nymphs of T. tabaci in descending order as follows; spinetoram, pyridalyl, imidacloprid, thiamethoxam, lambda-cyhalothrin, dinotefuran, pyriproxyfen, malathion, azadirachtin and finally Beauvaria bassiana. On the other hand, these insecticides can be arranged according to the general means of reduction percentages of T. tabaci adults in a descending order as follows; pyridalyl, spinetoram, thiamethoxam, imidacloprid, lambdacyhalothrin, dinotefuran, pyriproxyfen, malathion, Beauvaria bassiana and azadirachtin. The results of the population trends of T. tabaci revealed that the onion thrips had two generations during the onion growing period. There was a significantly negative correlation (P˂0.05) between population density of onion thrips and relative humidity. The results also revealed that the temperature positively and significantly affect T. tabaci population in both seasons 2020 and 2021.

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Section: Influence Of Abiotic Factors On Population Dynamics Of Onion Thrips T Tabaci In Onion Plantssupporting

confidence: 93%

Efficiency of Some Chemical and Bio-Insecticides Against Onion Thrips, Thrips Tabaci Lindeman (Thysanoptera: Thripidae)

Khozimy

Abuzeid

Darwish

2021

Alexandria Science Exchange Journal

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“…Our results indicate that among the tested temperature levels 23 C is the optimal temperature for the reproduction of T. tabaci lineages. Based on the observed fecundity, the optimum temperature for maximum egg laying was at 23 C. Murai (2000) has reported that the fecundity of the L2 lineage was 270 eggs at 23 C on honey and pollen, however, the fecundity started to decrease at 25 C and dropped drastically to 62 eggs per female at 30 C. Thus, food source also affects life table parameters of T. tabaci (Moraiet et al, 2017). van Rijn et al (van Rijn, Mollema, & Steenhuis-Broers, 1995) reported that females of T. tabaci produced 27.5 eggs on cucumber at 25 C. Hassanzadeh et al (2003) reported on onion plants at 27 C an average of 31.63 eggs.…”

Section: Discussionmentioning

confidence: 99%

Effect of temperature on the sex ratio and life table parameters of the leek‐(L1) and tobacco‐associated (T) Thrips tabaci lineages (Thysanoptera: Thripidae)

2021

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Temperature strongly affects insect biological response. Effects of temperature on the sex ratio, preoviposition, fecundity, egg hatchability rate, and adult longevity of the L1 and T Thrips tabaci lineages were studied under laboratory conditions at three constant temperature levels (15, 23, and 30°C) on cabbage and tobacco leaf discs, respectively. Results showed that temperature affects all the tested life table parameters of L1 and T lineages. The proportion of female's log‐linearly increased as temperature increased. Preoviposition period, fecundity, adult longevity, and egg hatchability rate were reduced significantly with increasing temperature. In both lineages, the lowest egg hatchability rates were recorded at 30°C and the highest rates were recorded at 15°C. Mean fecundity of the L1 and T lineages were 107.63 and 84.83 at 23°C, respectively, and mean fecundity of the L1 and T lineages were 19.88 and 70.82 at 15°C, respectively. The lowest mean fecundity was recorded at 15°C and 30°C for the L1 and T lineages, respectively. Mean longevity were 34.22 and 81.82 days at 15°C for L1 and T lineages, respectively. Whereas, the shortest mean longevity (13.63 and 13.91 days) was observed at 30°C for the L1 and T lineages, respectively. Our results demonstrated that 23°C was the optimum temperature for fecundity among the studied temperature levels for the studied population of the L1 and T T. tabaci lineages.

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“…Os modelos, em geral, apresentaram relação positiva entre a incidência do inseto e a temperatura, para as temperaturas máxima e média. Isso está de acordo com dados de outros autores que ressaltaram a importância da temperatura no incremento populacional de tripes em cebola (GONÇALVES, 1997;JIMÉNEZ et al, 2002;MORAIET;ANSARI, 2014 (SMITH et al, 2016).…”

Section: Notas Deunclassified

“…A umidade relativa apresentou relação inversa com a incidência do inseto. Isso está de acordo com a afirmação de que o tempo seco é fator de incremento populacional do inseto, como ressaltado por outros autores (GONÇALVES, 1997;JIMÉNEZ et al, 2002;RUEDA et al, 2007;MORAIET;ANSARI, 2014 (DOMICIANO et al, 1993;GONÇALVES, 1998;WAIGANJO et al, 2008; GONÇALVES; VIEIRA NETO, 2011).…”

Section: Notas Deunclassified

Modelo Para a Previsão Da Incidência De Tripes Em Cebola Pelo Clima

Gonçalves¹,

Júnior²,

Geremias³

et al. 2020

RUVRD

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O objetivo deste estudo foi desenvolver um modelo de previsão da incidência de tripes em cebola para Santa Catarina de acordo com as variáveis climáticas. No estudo foram gerados modelos da incidência do inseto nas cultivares Baia Periforme, Bola Precoce e Crioula baseados em dez anos de dados de variáveis climáticas. A incidência de tripes e número de ninfas por planta foi relacionada por meio de regressão múltipla com stepwise, utilizando as variáveis: temperaturas mínima, máxima, média, diárias e semanais, precipitação pluviométrica acumulada na semana, umidades relativas diárias e semanais. O modelo selecionado para a previsão da incidência de tripes foi, y= 79,4 +0,8TMAX-1,1UR (TMAX, temperatura máxima do dia e UR, umidade média relativa semanal). Os níveis de incidência do inseto para o modelo de previsão foram baseados na seguinte escala: baixa, < 5 ninfas/planta; média, >=5 até 9 ninfas/planta; alta, >= 10 ninfas/ planta. O modelo é mais racional em termos ambientais e econômicos para a intervenção com controle químico, considerando a entrada de dados a partir da segunda quinzena de agosto até a primeira semana de dezembro. Palavras-chave: Thrips tabaci. Allium cepa. Sistema de previsão.

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Biological parameters of onion thrips, Thrips tabaci Lindeman on onion cultivars

Cited by 6 publications

References 15 publications

Efficiency of Some Chemical and Bio-Insecticides Against Onion Thrips, Thrips Tabaci Lindeman (Thysanoptera: Thripidae)

Efficiency of Some Chemical and Bio-Insecticides Against Onion Thrips, Thrips Tabaci Lindeman (Thysanoptera: Thripidae)

Effect of temperature on the sex ratio and life table parameters of the leek‐(L1) and tobacco‐associated (T) Thrips tabaci lineages (Thysanoptera: Thripidae)

Modelo Para a Previsão Da Incidência De Tripes Em Cebola Pelo Clima

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