Sampling Techniques for Thrips (Thysanoptera: Thripidae) in Preflowering Tomato

Joost, P. Houston; Riley, David G.

doi:10.1093/jee/97.4.1450

Cited by 27 publications

(20 citation statements)

References 10 publications

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“…In the Georgia tomato crop, TSWV is primarily transmitted by western ßower thrips, Frankliniella occidentalis (Pergande), and tobacco thrips, Frankliniella fusca (Hinds) (Salguero Navas et al 1991, Riley andPappu 2000). Tobacco thrips have been found to be more prevalent than western ßower thrips on preßowering tomato in Georgia (Joost and Riley 2004). Management of the thrips vector can be difÞcult because immature thrips can acquire TSWV from infected weed host plants surrounding vegetable Þelds (Groves et al 2001b).…”

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confidence: 99%

Tactics for Management of Thrips (Thysanoptera: Thripidae) and Tomato Spotted Wilt Virus in Tomato

Riley¹,

Pappu²

2004

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Four studies were conducted in Georgia during spring 1999, 2000, 2001, and 2002 to evaluate various management tactics for reducing thrips and thrips-vectored tomato spotted wilt virus (TSWV) in tomato and their interactions relative to fruit yield. Populations of thrips vectors of TSWV, Frankliniella occidentalis (Pergande) and Frankliniella fusca (Hinds), were determined using flower and sticky trap samples. The management practices evaluated were host plant resistance, insecticide treatments, and silver or metallic reflective mulch. Averaged over all tests, the TSWV-resistant tomato 'BHN444' on silver mulch treatment had the largest effect in terms of reducing thrips and spotted wilt and increasing marketable yield. Of the insecticide treatments tested, the imidacloprid soil treatment followed by early applications of a thrips-effective foliar insecticide treatment provided significant increase in yield over other treatments. Tomato yield was negatively correlated with the number of F. fusca and percentage of TSWV incidence. F. occidentalis per blossom was positively correlated with percentage of TSWV incidence, but not with yield. No significant interactions were observed between cultivar reflective mulch main plot treatments and insecticide subplot treatments; thus, treatment seemed to be additive in reducing the economic impact of thrips-vectored TSWV. Control tactics that manage thrips early in the growing season significantly increased tomato yield in years when the incidence of TSWV was high (>17%).

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confidence: 99%

Tactics for Management of Thrips (Thysanoptera: Thripidae) and Tomato Spotted Wilt Virus in Tomato

Riley¹,

Pappu²

2004

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“…occidentalis (Harrewijn et al 1996b). F. fusca is more abundant on the foliage of preblooming tomatoes than F. occidentalis (Joost and Riley 2004), which may indirectly support this hypothesis.…”

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confidence: 80%

Imidacloprid Effects on Probing and Settling Behavior of <I>Frankliniella fusca</I> and <I>Frankliniella occidentalis</I> (Thysanoptera: Thripidae) in Tomato

Joost¹,

Riley²

2005

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The effects of tomato, Lycopersicum spp., leaves treated with imidacloprid on probing and settling behavior of Frankliniella fusca (Hinds) and Frankliniella occidentalis (Pergrande) were examined using an electrical penetration graph technique and an intact leaf bioassay. For each experiment, thrips were subjected to nontreated plants and plants treated with either of two rates of imidacloprid: 7.81 and 41.55 microg [(AI)] per plant. F. fusca probed less frequently on plants treated with the high rate of imidacloprid compared with the nontreated plants. The duration of F. fusca noningestion probing waveforms and ingestion was shorter on plants treated with the high rate of imidacloprid compared with that on nontreated plants. In contrast, F. occidentalis probed longer and more frequently on plants treated with either the low or high imidacloprid rates compared with nontreated plants. They also ingested more frequently and for longer durations on plants treated with the high rate compared with nontreated plants. The duration and frequency of noningesting probing waveforms were greater on the imidacloprid-treated plants compared with the nontreated plants. F. occidentalis probed and ingested more frequently and for a longer duration than F. fusca on plants treated with the high rate of imidacloprid. F. fusca ingested more frequently and the duration of ingestion was longer than F. occidentalis in untreated plants. F. fusca and F. occidentalis settling behavior differed within the first 30 min in a choice bioassay. F. fusca preferred settling on leaves of nontreated plants, whereas F. occidentalis showed no preference in an intact leaf choice bioassay.

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“…The efÞciency of the two infestation techniques was compared using RNP, which gives equal consideration to precision and costs as variables (Ruesnik 1980, Youngman et al 1996, Joost and Riley 2004. Relative net precision has been used to compare the precision level among sampling techniques for several insect pests (Pearsall andMyers 2000, Joost andRiley 2004).…”

Section: Methodsmentioning

confidence: 99%

A Technique Using Reusable Components for Hand-Infesting Cornstalks With European Corn Borer (Lepidoptera: Crambidae) Larvae

Tiwari¹,

Youngman²,

Jordan³

et al. 2010

jnl. econ. entom.

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Field trials were conducted in 2005 and 2006 to evaluate the use of reusable wire nuts and nonreusable gelatin capsules for hand-infesting cornstalks with European corn borer, Ostrinia nubilalis (Hübner), (Lepidoptera: Crambidae) larvae. The reusable technique, which consists of a modified WingGard plastic wire connector (i.e., wire nut) as a containment device for larvae, was compared over three plant growth stages to a gelatin capsule technique. In 2005 and 2006, the wire nut technique resulted in significantly higher number of wire nuts still intact (i.e., undamaged, with or without a larva) on the stalk at 72 h after infestation compared with the gelatin capsule technique. In addition, the wire nut technique resulted in significantly higher number of tunnels per stalk compared with the gelatin capsule technique at all three corn growth stages during both years. In 2005, the mean +/- SEM number of tunnels per stalk was 0.53 +/- 0.03 in the wire nut technique compared with 0.13 +/- 0.03 tunnels per stalk in the gelatin capsule technique. In 2006, the mean number of tunnels per stalk was 0.45 +/- 0.03 in the wire nut technique compared with 0.08 +/- 0.02 tunnels per stalk in the gelatin capsule technique. In addition, the relative net precision in the wire-nut technique was approximately 2 times higher compared with the gelatin capsule technique.

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Sampling Techniques for Thrips (Thysanoptera: Thripidae) in Preflowering Tomato

Cited by 27 publications

References 10 publications

Tactics for Management of Thrips (Thysanoptera: Thripidae) and Tomato Spotted Wilt Virus in Tomato

Tactics for Management of Thrips (Thysanoptera: Thripidae) and Tomato Spotted Wilt Virus in Tomato

Imidacloprid Effects on Probing and Settling Behavior of <I>Frankliniella fusca</I> and <I>Frankliniella occidentalis</I> (Thysanoptera: Thripidae) in Tomato

A Technique Using Reusable Components for Hand-Infesting Cornstalks With European Corn Borer (Lepidoptera: Crambidae) Larvae

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