Abstract
Plant damages caused by leafhopper, Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean were first encountered in 2007 in Makassar, South Sulawesi. The insect has been constantly associated with soybean crops in the province ever since. The purposes of the present study were to (i) evaluate potential yield loss attributable to the leafhopper in an experimental set up, (ii) seasonal abundance of E. terminalis, and (iii) distribution of E. terminalis in all major soybean-producing areas in the province. Potential yield loss due to the leafhopper was assessed in a field experiment using two large plots. One of the plots was kept leafhopper-free by weekly insecticide sprays; and the other plot was left unsprayed to allow leafhopper infestation to occur. Adult abundance was weekly monitored using a sweep net throughout the season. Nymph abundance was determined by direct count on the plant leaves. Leafhopper distribution was assessed through surveys conducted in all major soybean-producing areas in South Sulawesi, from 2009–2013. The results of the study showed that E. terminalis caused an average yield loss of 26% on susceptible crops without insecticide use. First leafhopper infestation in all planting seasons occurred two weeks after the plant emergence. Rainfall negatively correlated with the leafhopper abundance. The leafhopper existed in all major soybean production areas in the province. Therefore, our results confirmed the status of E. terminalis as an important soybean pest in the region. In addition, crops planted early in the dry season could escape from heavy leafhopper infestation.
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Claims 6
Claim · model-written summary
Empoasca terminalis caused an average yield loss of 26% on soybean without insecticide use.
- Taxon
- soybean
Glycine maxe0 - Treatment
- leafhopper infestatione2
- Interactor
- E. terminalise1pest
- Outcome
- average yield losse1
- Direction
- causede1
- Value
- 26%e1
- Qualifier
- without insecticide usee1
- Comparator
- leafhopper-free by weekly insecticide sprayse2
- Setting
- field experimente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant damages caused by leafhopper, Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean were first encountered in 2007 in Makassar, South Sulawesi”
e1“The results of the study showed that E. terminalis caused an average yield loss of 26% on susceptible crops without insecticide use”
e2“One of the plots was kept leafhopper-free by weekly insecticide sprays; and the other plot was left unsprayed to allow leafhopper infestation to occur”
e3“Potential yield loss due to the leafhopper was assessed in a field experiment using two large plots”
Claim · model-written summary
Rainfall was negatively correlated with leafhopper abundance on soybean.
- Taxon
- soybeanGlycine maxe0
- Interactor
- leafhoppere4pest
- Outcome
- leafhopper abundancee4
- Direction
- negatively correlatede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant damages caused by leafhopper, Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean were first encountered in 2007 in Makassar, South Sulawesi”
e4“Rainfall negatively correlated with the leafhopper abundance”
Claim · model-written summary
The leafhopper existed in all major soybean production areas in South Sulawesi.
- Taxon
- soybeanGlycine maxe5
- Interactor
- leafhoppere5pest
- Outcome
- existed in all major soybean production arease5
- Setting
- South Sulawesie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant damages caused by leafhopper, Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean were first encountered in 2007 in Makassar, South Sulawesi”
e5“The leafhopper existed in all major soybean production areas in the province”
Claim · model-written summary
Soybean crops planted early in the dry season could escape from heavy leafhopper infestation.
- Taxon
- soybeanGlycine maxe0
- Treatment
- crops planted early in the dry seasone6
- Outcome
- heavy leafhopper infestatione6
- Direction
- could escape frome6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant damages caused by leafhopper, Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean were first encountered in 2007 in Makassar, South Sulawesi”
e6“crops planted early in the dry season could escape from heavy leafhopper infestation”
Claim · model-written summary
First leafhopper infestation in all planting seasons occurred two weeks after plant emergence on soybean.
- Taxon
- soybeanGlycine maxe0
- Interactor
- leafhoppere7pest
- Outcome
- First leafhopper infestatione7
- Value
- two weekse7
- Qualifier
- in all planting seasonse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant damages caused by leafhopper, Empoasca terminalis Distant (Homoptera: Cicadellidae) on soybean were first encountered in 2007 in Makassar, South Sulawesi”
e7“First leafhopper infestation in all planting seasons occurred two weeks after the plant emergence”
Claim · model-written summary
The results confirmed E. terminalis as an important soybean pest in South Sulawesi.
- Taxon
- soybeanGlycine maxe0
- Interactor
- E. terminalise0pest
- Outcome
- status of E. terminalis as an important soybean peste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Therefore, our results confirmed the status of E. terminalis as an important soybean pest in the region”
The same questions in other papers
infection · yield · Glycine max (soybean)Results differ
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- positive
- positive
- positive
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See all 51 papers →drought · pest · Glycine max (soybean)Positive and negative results
4 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
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See all 8 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.