Efficacy of plant volatiles for postharvest control of western flower thrips in fresh produce

2008 ◽  
Vol 61 ◽  
pp. 197-204
Author(s):  
C.W. Van_Epenhuijsen ◽  
K.G. Somerfield ◽  
D. Hedderley
Keyword(s):  
Plant Material ◽  
Plant Volatiles ◽  
Frankliniella Occidentalis ◽  
Fresh Produce ◽  
Western Flower Thrips ◽  
The Other ◽  
Insect Infestation ◽  
Main Compound ◽  
Flower Thrips ◽  
Postharvest Control

Insect infestation of fresh produce exported from New Zealand is an ongoing issue for exporters Seventeen lowhazard volatile compounds were screened for their potential as fumigants for controlling adults nymphs and eggs of western flower thrips (WFT) Frankliniella occidentalis (Pergande) WFT infested chrysanthemum flowers were exposed to volatiles in glass jars with circulation fans Higher mortality was achieved for adults than for nymphs/eggs Mortality after the 6 h exposure was greater than after the 2 h exposure Compounds that had good efficacy against WFT included 2propyn1ol diallyl sulphide (the main compound of garlic oils) 2methyl(E)butenal and ethyl acetate Of these 2propyn1ol caused significant phytotoxicity at the concentrations tested The other three were tolerated by the plant material and are worth further investigation

scholarly journals Effect of Tank Mixing Pesticides in Controlling Western Flower Thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae)

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 767D-768
Author(s):  
Daniel Warnock* ◽  
Raymond Cloyd
Keyword(s):  
Frankliniella Occidentalis ◽  
Western Flower Thrips ◽  
The Other ◽  
Labor Costs ◽  
Laboratory Bioassay ◽  
Eustoma Grandiflorum ◽  
Greenhouse Experiments ◽  
Flower Thrips ◽  
Plant Feeding ◽  
The Individual

Greenhouse managers tank mix pesticides to broaden the spectrum of pest control, and reduce pesticide and labor costs. However, the effect of tank mixing an assortment of pesticides on efficacy to control pests has not been documented. This study assessed how tank mixing commercially available insecticides and miticides in two-, three-, and four-way combinations impacts the control of western flower thrips (WFT), Frankliniella occidentalis in greenhouse experiments and a laboratory bioassay. The pesticides screened were spinosad, abamectin, bifenazate, azadirachtin, and imidacloprid. Each pesticide was applied at the label-recommended rate. In the greenhouse experiments, transvaal daisy (Gerbera jamesonii) and lisianthus (Eustoma grandiflorum) flowers were inoculated with 25 adult WFT, and then flowers were sprayed with the designated treatments. After 72 hours, flowers were emasculated to assess the numbers of live and dead WFT. In the laboratory bioassay, chrysanthemum (Dendranthema grandiflora) leaf disks, treated with each pesticide and all tank mixes, were exposed to 15 adult WFT. The numbers of live and dead WFT were assessed after 48 hours. For all three experiments, no antagonistic tank mixes were identified. All treatments with spinosad, including the individual application and tank mixes, resulted in high mortality of WFT based on the numbers of live and dead WFT recovered. Our data suggest that tank mixes of spinosad with the other pesticides tested do not affect the efficacy of spinosad in controlling WFT. This information is important to greenhouse managers who want to tank mix pesticides and still control WFT in addition to the other plant-feeding arthropods found in greenhouses.

scholarly journals Virus status of western flower thrips (Frankliniella occidentalis) does not affect their response to a thrips lure or host plant volatiles in a Ytube olfactometer

2012 ◽  
Vol 65 ◽  
pp. 120-125 ◽  
Author(s):  
M.M. Davidson ◽  
S.M. Skill ◽  
R.C. Butler ◽  
M-C. Nielsen ◽  
S. Keenan ◽  
...  
Keyword(s):  
Plant Volatiles ◽  
Tomato Spotted Wilt Virus ◽  
Frankliniella Occidentalis ◽  
Western Flower Thrips ◽  
Behavioural Response ◽  
Host Plant Volatiles ◽  
Flower Thrips ◽  
Tomato Spotted Wilt ◽  
Wilt Virus ◽  
The Impact

The impact of tospovirus infection on the behaviour of western flower thrips (Frankliniella occidentalis) was evaluated in a Ytube olfactometer The response of female western flower thrips with or without a tospovirus (Tomato spotted wilt virus TSWV) to a thrips lure (methyl isonicotinate MI) and chrysanthemum buds was recorded Compared to the blank arm significantly more thrips chose the odourladen arm of the Ytube when it contained MI (65 P016) increase the percentage of thrips that chose the odourladen arm over and above the cleanair arm but thrips (virusfree and infected) moved more quickly to the end of either arm when a bud was present The virus status of thrips was confirmed with RTPCR The presence of the virus in the vector did not substantially affect the behavioural response of the vector to a lure or hostplant material (P>04)

Frankliniella occidentalis (western flower thrips).

2021 ◽  
Author(s):  
Stuart Reitz
Keyword(s):  
Plant Material ◽  
Frankliniella Occidentalis ◽  
Plant Protection ◽  
Western Flower Thrips ◽  
Agricultural Pests ◽  
Fruit Crops ◽  
Horticultural Crops ◽  
Flower Thrips ◽  
Rapid Spread ◽  
The World

Abstract Since the 1970s Frankliniella occidentalis has successfully invaded many countries to become one of the most important agricultural pests of ornamental, vegetable and fruit crops globally. Its invasiveness is largely attributed to the international movement of plant material and insecticide resistance, both of which have combined to foster the rapid spread of the species throughout the world (Kirk and Terry, 2003; Reitz et al., 2020). Individuals are very small and they reside in concealed places on plants; thus are easily hidden and hard to detect in transported plant material. They reproduce rapidly and are highly polyphagous, breeding on many horticultural crops that are transported around the world. F. occidentalis is species no. 177 on the list of A2 pests regulated as quarantine pests in the European Plant Protection Organisation (EPPO) region (version 2005-09). It has now reached many countries, and remains a serious threat to crops in those countries that it has not yet reached.

Effect of Pesticide Mixtures in Controlling Western Flower Thrips (Thysanoptera: Thripidae)

2005 ◽  
Vol 40 (1) ◽  
pp. 54-66 ◽  
Author(s):  
Daniel F. Warnock ◽  
Raymond A. Cloyd
Keyword(s):  
Frankliniella Occidentalis ◽  
Western Flower Thrips ◽  
The Other ◽  
Labor Costs ◽  
Laboratory Bioassay ◽  
Eustoma Grandiflorum ◽  
Pesticide Mixtures ◽  
Greenhouse Experiments ◽  
Flower Thrips ◽  
Plant Feeding

Greenhouse managers mix together pesticides to broaden the spectrum of pest control and to reduce pesticide and labor costs. However, the efficacy of pesticide mixtures has not been well-documented. This study assesses how mixtures of commercially available insecticides and miticides in two, three, and four-way combinations affected the control of western flower thrips, Frankliniella occidentalis Pergande, in greenhouse experiments and in a laboratory bioassay. The pesticides screened in the greenhouse experiments and laboratory bioassay were spinosad, abamectin, bifenazate, azadirachtin and imidacloprid. Each pesticide was applied at the maximum label-recommended rate. In the greenhouse experiments, transvaal daisy (Gerbera jamesonii H. Bolus ex Hook. f) and lisianthus (Eustoma grandiflorum G. Don ex Sweet) flowers were infested with 25 adult western flower thrips (mixture of females and males). Flowers were then sprayed with the designated treatments. After 72 h, flowers were dissected to assess the numbers of live and dead western flower thrips. In the laboratory bioassay, chrysanthemum (Dendranthema grandiflora Tzvelev) leaf sections, treated with solutions of each pesticide and all possible combinations, were exposed to 15 adult western flower thrips. The numbers of live and dead western flower thrips were assessed after 48 h. For all three experiments, we were not able to identify any antagonistic pesticide combinations. All treatments with spinosad, including the individual application and pesticide mixtures, resulted in high mortality of western flower thrips. Our data suggest that combinations of spinosad with the other pesticides tested do not affect the efficacy of spinosad in controlling western flower thrips. This information is important to greenhouse managers who wish to mix pesticides and still control western flower thrips in addition to the other plant-feeding arthropods found in greenhouses.

A cold treatment for postharvest control of western flower thrips on strawberry runners

2005 ◽  
Vol 45 (12) ◽  
pp. 1649
Author(s):  
P. Williams ◽  
K. M. Green ◽  
B. Swanson
Keyword(s):  
Frankliniella Occidentalis ◽  
Cold Treatment ◽  
Western Flower Thrips ◽  
Exposure Period ◽  
Life Stages ◽  
Flower Thrips ◽  
Strawberry Runner ◽  
Potential Strategy ◽  
Postharvest Control ◽  
Leaf Disks

In 1998–99, outbreaks of Frankliniella occidentalis (Pergrande), western flower thrips (WFT), caused extensive damage to strawberry crops in the Yarra Valley, Victoria. These crops were within 30 km of Toolangi where over 80% of certified strawberry runners for Australia are produced. Commercial growers store runners for various periods of time at temperatures as low as –2°C. Cold temperature disinfestation was evaluated as a potential strategy in a contingency plan to prevent the spread of WFT on strawberry runners. Western flower thrips at various life stages on gerbera flowers (on which they were reared), were placed in small bags, made from the plastic liners used in commercial strawberry runner cartons, together with strawberry runners and exposed to –2°C for periods of 1, 2, 4, or 8 weeks. All WFT died within 4 weeks. Additional experiments were conducted in which WFT, in bags with runners or on gerbera leaf disks in petri dishes, were exposed to –2°C for 3 weeks. Only a few WFT survived these treatments; however, they were moribund. When they were assessed 2 days after completion of the exposure period, all WFT were dead. It was concluded that strawberry runners carrying WFT can be disinfested by exposing WFT to –2°C for 4 weeks and that this should be achievable under commercial conditions.

scholarly journals 443 Resistance in Impatiens wallerana to Western Flower Thrips [Frankliniella occidentalis (Pergande)] Feeding Damage

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 470B-470
Author(s):  
B. Bejie Herrin ◽  
Daniel F. Warnock
Keyword(s):  
Plant Growth ◽  
Plant Resistance ◽  
Plant Material ◽  
Frankliniella Occidentalis ◽  
Western Flower Thrips ◽  
Pesticide Use ◽  
Feeding Damage ◽  
Visual Evaluation ◽  
Flower Thrips ◽  
Thrips Population

Western flower thrips are an ever-increasing problem in greenhouse floriculture crops. Thrips resistance to pesticides as well as tighter regulations on pesticide use are making thrips management in the greenhouse more difficult. To improve host plant resistance, a study was conducted to determine if impatiens cultivars varied in their susceptibility to western flower thrips feeding damage. In a replicated study, nine impatiens cultivars were inoculated with about 30 thrips. Thrips were allowed to feed on individual plants during an 8-week period of growth. During plant growth, visual evaluations to estimate thrips feeding damage were conducted every 2 weeks. At the conclusion of the experiment, a final visual evaluation was made and thrips numbers were determined. Cultivars varied in estimates of thrips feeding damage. Several cultivars exhibited significantly reduced levels of thrips feeding damage. Of these cultivars, some had high thrips population levels, indicating tolerance, while other cultivars had low thrips population levels, an indication of antibiosis. One cultivar was determined to be highly susceptible to thrips feeding damage. This cultivar was so damaged by the end of the study, remaining plant material was unable to support thrips populations. Variability was found in the levels of thrips feeding damage and thrips population levels indicating the presence of tolerance and/or antibiosis. Because of detected variability, the potential for improving impatiens resistance to thrips feeding damages exists.

Sign in / Sign up

Export Citation Format

Share Document