Abstract
Onion thrips (Thrips tabaci L.) is one of the most important serious insect pests of onion (Allium cepa L.) cultivation in Ethiopia. The present study was conducted to evaluate some botanical extracts viz. Artemisia annua, Azadirachta indica, Bidens pilosa, Chrysanthemum cinerariaefolium, Cymbopogon citratus, Nicotiana tabacum, Nicotiana spp., (local var.,), Parthenium hysterophorous, Phytolacca dodecandra, Securidaca longepedunculata and two indigenous isolates of entomopathogenic fungi (EPF) viz. Beauveria bassiana (PPRC-56) and Metarhizium anisopliae (PPRC-6) and soap detergent powder. They were examined for controlling onion thrips (Thrips tabaci L.) under field condition in Guder, Toke Kutaye district of Ethiopia from mid October 2010 to early April 2011. Diazinon 60% E.C was applied at the recommended rate of 1.8 l/h and the plot left was examined as controls. After 1 st day application of the different agents, EPF and untreated control were not significantly different. However, the results on 3 rd , 5 th , and 7 th day after application of EPF treatments indicated that highly significant mortality. The rate of mortality in all of the treatments after 1 st day ranged from 0 to 74.75%. On the other hand, botanical extracts recorded at 3 rd day of application ranged from 26.09 to 74.75% within 3days of the higher mortality was recorded. On 5 th and 7 th day, except B. bassiana (PPRC-56), the mortality rate in all treatments became declined. The results indicated that insecticidal actions of all the tested agents exhibited to the ranging from 26.09 to 74.75% against onion thrips. Of the different agents, Nicotiana spp., P. dodecandra, S. longepedunculata and N. tabacum exhibited high mortality rate (69.65, 68.99, 63.85 and 63.56%, respectively), whereas in C. cinerariaefolium, A. indica and P. hysterophorous showed intermediate mortality rate (60.79, 56.89 and 52.06 respectively) and the rest were the lowest mortality rate. High bulb yield reduction was recorded in untreated plots but low yield reduction was observed in treated plots and control check. The treatments also showed reducing onion thrips population and also gave significant control over the treated check. This study indicated that Nicotiana spp., P. dodecandra, S. longepedunculata, N. tabacum and B. bassiana were significantly very effective against onion thrips under field condition at recommended rate and then confirmed the valuable rate of botanicals and EPF as components of Integrated Pest Management (IPM) practices in Ethiopia.
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Claims 17
Claim · model-written summary
EPF did not differ significantly from untreated control one day after application.
- Taxon
- Onion
Allium cepat0 - Treatment
- EPFe0
- Outcome
- not significantly differente0
- Comparator
- untreated controle0
ThripsNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 1 st day application of the different agents, EPF and untreated control were not significantly different”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
EPF treatments produced highly significant thrips mortality on days three, five and seven.
- Taxon
- OnionAllium cepat0
- Treatment
- EPF treatmentse0
- Outcome
- mortalitye0
- Qualifier
- 3 rd , 5 th , and 7 th daye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the results on 3 rd , 5 th , and 7 th day after application of EPF treatments indicated that highly significant mortality”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
One-day mortality across treatments ranged from 0 to 74.75%.
- Taxon
- OnionAllium cepat0
- Outcome
- rate of mortalitye0
- Value
- 0 to 74.75%e0
- Qualifier
- after 1 st daye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of mortality in all of the treatments after 1 st day ranged from 0 to 74.75%”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
Botanical extracts caused 26.09 to 74.75% mortality at day three.
- Taxon
- OnionAllium cepat0
- Treatment
- botanical extractse0
- Outcome
- mortalitye1
- Value
- 26.09 to 74.75%e0
- Qualifier
- 3 rd daye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“botanical extracts recorded at 3 rd day of application ranged from 26.09 to 74.75%”
t0“Control of Onion Thrips (Thrips tabaci L.)”
e1“the results on 3 rd , 5 th , and 7 th day after application of EPF treatments indicated that highly significant mortality”
Claim · model-written summary
Mortality declined on days five and seven for treatments other than B. bassiana.
- Taxon
- OnionAllium cepat0
- Outcome
- mortality ratee0
- Direction
- declinede0
- Qualifier
- except B. bassiana (PPRC-56)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On 5 th and 7 th day, except B. bassiana (PPRC-56), the mortality rate in all treatments became declined”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
Nicotiana spp. caused 69.65% thrips mortality.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana spp., P. dodecandra, S. longepedunculata and N. tabacum exhibited high mortality rate (69.65, 68.99, 63.85 and 63.56%, respectively)”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
P. dodecandra caused 68.99% thrips mortality.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana spp., P. dodecandra, S. longepedunculata and N. tabacum exhibited high mortality rate (69.65, 68.99, 63.85 and 63.56%, respectively)”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
S. longepedunculata caused 63.85% thrips mortality.
- Taxon
- OnionAllium cepat0
- Treatment
- S. longepedunculatae0
- Outcome
- mortality ratee0
- Direction
- highe0
- Value
- 63.85e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana spp., P. dodecandra, S. longepedunculata and N. tabacum exhibited high mortality rate (69.65, 68.99, 63.85 and 63.56%, respectively)”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
N. tabacum caused 63.56% thrips mortality.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nicotiana spp., P. dodecandra, S. longepedunculata and N. tabacum exhibited high mortality rate (69.65, 68.99, 63.85 and 63.56%, respectively)”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
C. cinerariaefolium caused 60.79 thrips mortality.
- Taxon
- OnionAllium cepat0
- Treatment
- C. cinerariaefoliume0
- Outcome
- mortality ratee0
- Direction
- intermediatee0
- Value
- 60.79e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. cinerariaefolium, A. indica and P. hysterophorous showed intermediate mortality rate (60.79, 56.89 and 52.06 respectively)”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
A. indica caused 56.89 thrips mortality.
- Taxon
- OnionAllium cepat0
- Treatment
- A. indicae0
- Outcome
- mortality ratee0
- Direction
- intermediatee0
- Value
- 56.89e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. cinerariaefolium, A. indica and P. hysterophorous showed intermediate mortality rate (60.79, 56.89 and 52.06 respectively)”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
P. hysterophorous caused 52.06 thrips mortality.
- Taxon
- OnionAllium cepat0
- Treatment
- P. hysterophorouse0
- Outcome
- mortality ratee0
- Direction
- intermediatee0
- Value
- 52.06e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. cinerariaefolium, A. indica and P. hysterophorous showed intermediate mortality rate (60.79, 56.89 and 52.06 respectively)”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
Untreated plots had high bulb-yield reduction.
- Taxon
- OnionAllium cepat0
- Outcome
- bulb yield reductione0
- Direction
- Highe0
- Setting
- untreated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High bulb yield reduction was recorded in untreated plots”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
Treated plots had low bulb-yield reduction.
- Taxon
- OnionAllium cepat0
- Treatment
- treated plotse0
- Outcome
- yield reductione0
- Direction
- lowe0
- Comparator
- control checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low yield reduction was observed in treated plots and control check”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
Treatments reduced onion thrips population.
- Taxon
- OnionAllium cepat0
- Treatment
- treatmentse0
- Interactor
- onion thripse0pest
- Outcome
- onion thrips populatione0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments also showed reducing onion thrips population”
t0“Control of Onion Thrips (Thrips tabaci L.)”
Claim · model-written summary
Treatments significantly controlled thrips relative to the treated check.
- Taxon
- OnionAllium cepat0
- Treatment
- treatmentse1
- Outcome
- controle0
- Comparator
- treated checke0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“also gave significant control over the treated check”
t0“Control of Onion Thrips (Thrips tabaci L.)”
e1“The treatments also showed reducing onion thrips population”
Claim · model-written summary
The authors recommend botanicals and EPF as components of integrated pest management in Ethiopia.
- Taxon
- OnionAllium cepat0
- Outcome
- components of Integrated Pest Management (IPM) practicese0
- Setting
- Ethiopiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“confirmed the valuable rate of botanicals and EPF as components of Integrated Pest Management (IPM) practices in Ethiopia”
t0“Control of Onion Thrips (Thrips tabaci L.)”
The same questions in other papers
Nicotiana tabacum · pest · Allium cepa (onion)Results agree
1 paper in the same direction as this paper
- positive
botanical · pest · Allium cepa (onion)Positive and negative results
8 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- no effect
8 papers more in this group
See all 12 papers →biocontrol · Thrips · Allium cepa (onion)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.