Effects of Lateral Shoot Cutting on Population Density of the Chillie Thrips, Scirtothrips dorsalis HOOD(Thysanoptera:Thripidae)on Grape

Shiba, Manabu; Tanaka, Fukusaburo; Fujisaki, Kenji; Nakasuji, Fusao

doi:10.1303/aez.28.35

Cited by 19 publications

(12 citation statements)

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“…In a preliminary study using Pod Squad beans of three age groups (1, 4, and 7 wk), we found that 1-wk-old plants were considerably more attractive than 4-and 7-wk-old plants (unpublished data). S. dorsalis prefer to feed on new growth and young plants (Dev 1964, Shibao et al 1993, Seal et al 2006a.…”

Section: Discussionmentioning

confidence: 99%

Biological Parameters ofScirtothrips dorsalis(Thysanoptera: Thripidae) on Selected Hosts

2010

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Since its establishment in Florida in 2005, Scirtothrips dorsalis Hood, a highly polyphagous species, has become an economically important pest of ornamental plants and a potentially significant pest of vegetable and fruit crops. Fruit and vegetable production in Florida is trending toward significant adoption of organic methods and use of widely dispersed small fields in rapidly urbanizing landscapes. Landscape plants may serve as refugia from which S. dorsalis recruits can disperse to nearby fruit and vegetable plantings. Therefore, information on this pest's biology including how it is affected by various host species is needed to develop effective integrated pest management (IPM) programs. In the greenhouse and laboratory condition, we studied the effects of various host plants, development, diel flight activity, oviposition, and demographics of S. dorsalis. The pest preferred Jalapeño pepper and Knockout rose over the other hosts, and it was most active between 1000 and 1600 hours EST. Irrespective of the host species, the duration of each of the immature stadia varied within a narrow range, and their respective sizes were quite similar. Demographic parameters quantified included gross reproduction rate (GRR), net reproductive rate (R(o)), intrinsic rate of increase per day (R(m)), finite rate of increase per day (λ), and mean generation time (T). The pest population may increase by a factor of ≈ 1.09/d, so that it may double in 8 or 9 d. The above information should be helpful in the development of sound programs to manage S. dorsalis on various crops and in the formulation of detection strategies by quarantine officers.

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Section: Discussionmentioning

confidence: 99%

Biological Parameters ofScirtothrips dorsalis(Thysanoptera: Thripidae) on Selected Hosts

2010

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“…Since S. dorsalis females lay their eggs mainly in the tissues of buds and young leaves (Dev, 1964;Nishino and Kodomari, 1988), their abundance is influenced by the quantity of available resources such as young shoots for feeding and oviposition (Shibao et al, 1993). In this study, in tea groves, repeated harvesting and trimming resulted in the continuous growth of young shoots; this was considered to facilitate the occurrence of S. dorsalis larvae (Fig.…”

Section: Discussionmentioning

confidence: 86%

Synchronism of immigration of adult yellow tea thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) to citrus orchards with reference to their occurrence on surrounding host plants

Masui

2007

Appl. Entomol. Zool.

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Scirtothrips dorsalis adults generally immigrate to citrus orchards after propagation on suitable host plants that grow near the orchards; however, it is not clear when these thrips immigrate. In this study, the time of S. dorsalis adult immigration to citrus orchards was examined in relation to their occurrence on surrounding host plants. The investigation was carried out in citrus orchards and the surrounding fields of the following three plants: tea groves, bigleaf podocarp trees, and Japanese pear trees. The average number of adults emerging from these four plant fields gave six or seven peaks from May to early September, notwithstanding the small number of adults emerging from the citrus orchards. The peak periods of trap catch in citrus orchards coincided with those of adult emergence from the fields of four plants. The peak periods of adult S. dorsalis density on citrus fruits and shoots coincided with those of trap catch in citrus orchards. These results demonstrated that S. dorsalis adults immigrated to citrus orchards immediately after emerging from other suitable host plants surrounding the orchards.

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“…After eclosing, the larvae migrate from mature leaves to newer growth near the terminals (Onkarappa and Mallik 1998). S. dorsalis was present on rose leaves and ßower petals in similar densities, which may suggest why it is referred to both as a ßower and foliar thrips (Shibao et al 1993, Saxena et al 1996. S. dorsalis may survive equally well on ßowers and foliage, and other factors such as competition, predation, and precipitation may be more important in determining within-plant distributions.…”

Section: Discussionmentioning

confidence: 95%

“…Factors such as thrips damaging plants beyond their ability to maintain maximum populations or migration to better food resources may have caused peak numbers of S. dorsalis and their peak damages to differ (Shibao et al 1993;Shibao 1997;Lewis 1997;Masui 2007a,b). When damage to rose plants increased with increasing on-plant S. dorsalis populations, mean numbers of ßowers and buds decreased by 24% (from a to b based on the TukeyÐKramer HSD test), and mean ßower areas (sizes) decreased by 47% (from a to c).…”

Section: Discussionmentioning

confidence: 99%

Population Dynamics ofScirtothrips dorsalis(Thysanoptera: Thripidae) and Other Thrips Species on Two Ornamental Host Plant Species in Southern Florida

Mannion¹,

Derksen²,

Seal³

et al. 2014

Environ Entomol

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Since its 2005 introduction into the United States, chilli thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae), has become a problematic pest of agronomic, vegetable, fruit, and ornamental plants. Knowledge of its population dynamics may help managers better monitor and control S. dorsalis. Population estimates were recorded for S. dorsalis and other thrips species on Knock-Out rose (Rosa 'Radrazz') and green buttonwood (Conocarpus erectus L.) from July 2007 to September 2008 in two field plots (one per plant species) in Homestead, FL. Yellow sticky card traps and samples of terminals, flowers, buds, and leaves were collected. S. dorsalis accounted for 95% of all thrips individuals collected from plants and 84% from traps with the remainder including at least 18 other thrips species. More thrips were caught on or flying near rose plants (47,438) than on or near buttonwoods (5,898), and on-plant densities of S. dorsalis appeared higher for rose than for buttonwood. Compared with rose leaves, rose buds, terminals, and flowers each had higher numbers of S. dorsalis, and buds and terminals had higher densities. On each host plant species, S. dorsalis density fluctuated over time with peaks in the late spring, summer, and fall, but populations were consistently low in the late winter and early spring. On roses, increased plant damage ratings correlated with reduced numbers of flowers and buds, reduced mean flower areas, and increased on-plant number and density of S. dorsalis. There were positive correlations over time between S. dorsalis density and plant damage rating for rose flowers (R = 0.78; P = 0.0003) and for buttonwood terminals (R = 0.90; P = 0.0001). Yellow sticky card traps were effective for monitoring S. dorsalis and may be especially useful and economically justified for the most susceptible hosts, but they also work well for less susceptible hosts. A good S. dorsalis scouting program should hence consider trap catches and symptoms such as leaf distortion, small flower area (size), and thrips population concentrations near buds and terminals.

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Effects of Lateral Shoot Cutting on Population Density of the Chillie Thrips, Scirtothrips dorsalis HOOD(Thysanoptera:Thripidae)on Grape

Cited by 19 publications

References 1 publication

Biological Parameters ofScirtothrips dorsalis(Thysanoptera: Thripidae) on Selected Hosts

Biological Parameters ofScirtothrips dorsalis(Thysanoptera: Thripidae) on Selected Hosts

Synchronism of immigration of adult yellow tea thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) to citrus orchards with reference to their occurrence on surrounding host plants

Population Dynamics ofScirtothrips dorsalis(Thysanoptera: Thripidae) and Other Thrips Species on Two Ornamental Host Plant Species in Southern Florida

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