Abstract
Studies were conducted in tropical greenhouses to elucidate the role of UV light (UV) for the orientation and flight behavior of the thrips Ceratothripoides claratris (Shumsher) (Thysanoptera: Thripidae), an important pest on tomato (Lycopersicum spp.), in the hot and humid tropics of South-East Asia. Four greenhouse types characterized by different combinations of UV-absorbing or -transmitting plastic films and nets on the roof and sidewalls, respectively, were used in these studies. In choice experiments C. claratris always preferred the environment with higher UV intensity. Furthermore, natural thrips populations around the greenhouses were captured during the majority of control dates in lower numbers on sticky traps on the outer sidewalls of greenhouses clad with UV-absorbing materials compared with UV-transmitting materials. The immigration of thrips into the UV-absorbing greenhouses also was impeded, as measured by sticky traps on the inner side walls. UV-absorbing plastic roofs showed the most pronounced deterrent effect for thrips movement toward greenhouses, and the UV-absorbing net effectively reduced thrips numbers crossing the net barrier into the greenhouse. A simple extension of UV-absorbing plastic roof around conventional greenhouses clad with UV-transmitting plastic and net reduced thrips capture rates inside the greenhouse up to 77% when thrips was released at 1 m distance from the net walls. These results are discussed in the context of wavelength dependent insect vision and the dilemma of tropical greenhouse constructions, i.e., physical pest exclusion versus appropriate ventilation to ensure a conducive microclimate for plant growth.
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Claims 6
Claim · model-written summary
Thrips preferred higher UV intensity in choice experiments.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- UV intensitye0
- Outcome
- C. claratris always preferred the environmente0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. claratris always preferred the environment with higher UV intensity”
e1“pest on tomato (Lycopersicum spp.)”
Claim · model-written summary
UV-absorbing cladding reduced thrips capture outside greenhouses.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- UV-absorbing materialse0
- Outcome
- natural thrips populations around the greenhouses were capturede0
- Direction
- lowere0
- Comparator
- UV-transmitting materialse0
- Setting
- greenhousese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“natural thrips populations around the greenhouses were captured during the majority of control dates in lower numbers on sticky traps on the outer sidewalls of greenhouses clad with UV-absorbing materials compared with UV-transmitting materials”
e1“pest on tomato (Lycopersicum spp.)”
e2“Ceratothripoides claratris (Shumsher)”
Claim · model-written summary
UV-absorbing greenhouses impeded thrips immigration.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- UV-absorbing greenhousese0
- Outcome
- immigration of thripse0
- Direction
- impedede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The immigration of thrips into the UV-absorbing greenhouses also was impeded”
e1“pest on tomato (Lycopersicum spp.)”
e2“Ceratothripoides claratris (Shumsher)”
Claim · model-written summary
UV-absorbing roofs had the strongest deterrent effect on thrips movement.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- UV-absorbing plastic roofse0
- Outcome
- thrips movement toward greenhousese0
- Direction
- most pronounced deterrente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV-absorbing plastic roofs showed the most pronounced deterrent effect for thrips movement toward greenhouses”
e1“pest on tomato (Lycopersicum spp.)”
e2“Ceratothripoides claratris (Shumsher)”
Claim · model-written summary
UV-absorbing net reduced thrips crossing into greenhouses.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- UV-absorbing nete0
- Outcome
- thrips numbers crossing the net barriere0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the UV-absorbing net effectively reduced thrips numbers crossing the net barrier into the greenhouse”
e1“pest on tomato (Lycopersicum spp.)”
e2“Ceratothripoides claratris (Shumsher)”
Claim · model-written summary
A UV-absorbing roof extension reduced indoor thrips captures by up to 77%.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- extension of UV-absorbing plastic roofe0
- Outcome
- thrips capture rates inside the greenhousee0
- Direction
- reducede0
- Value
- up to 77%e0
- Qualifier
- 1 m distance from the net wallse0
- Comparator
- conventional greenhouses clad with UV-transmitting plastic and nete0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A simple extension of UV-absorbing plastic roof around conventional greenhouses clad with UV-transmitting plastic and net reduced thrips capture rates inside the greenhouse up to 77% when thrips was released at 1 m distance from the net walls”
e1“pest on tomato (Lycopersicum spp.)”
e2“Ceratothripoides claratris (Shumsher)”
The same questions in other papers
uv · pest · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
trap barrier · pest · Solanum lycopersicum (tomato)Positive and negative results
20 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
19 papers more in this group
See all 23 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.