Abstract
Okra (Abelmoschus esculentus L.) is an annual vegetable crop grown in the subHimalayan region of north east India throughout the year except winter. The crop is susceptible to various insect and mite pests of which red spider mite, Tetranychus urticae Koch. causes heavy damage. So, a study on its occurrence and sustainable management was carried out. The pest was active throughout the growing period with a peak population (6.18 mites/leaf) during 23 rd SMW (last week of May) in the pre-kharif crop. Highest population (7.56/leaf) was found on the 42 nd SMW (first week of October) in the post kharif crop. Sudden fall of population was found in last week of June because of heavy rains. The incidence of mite population always remained higher on the upper canopy of the plant. Weekly population counts on mites showed non-significant positive correlation (p=0.05) with temperature, maximum relative humidity, total rainfall and significant positive correlation with minimum and average relative humidity. Eight treatments viz., microbial insecticide (toxin), avermectin (Vertimec 1.9 EC) @ 1.0 ml/ L; botanical insecticide azadirachtin (neemactin 0.15 EC) @ 2.5 ml/L,; botanical extracts, Spilanthes paniculata flower extracted in methanol @ 1.0% and 5.0% and mixed formulation like neem and floral extract of Spilanthes 5% (@ 2.5 ml and 50 ml/L were evaluated and compared with the ability of Sulphur (Sulfex 80 WP) @ 5g/ L and Fenazaquin (Magister 10EC) @ 2ml/L for the management of the mite pest. Fenazaquin resulted in the best suppression of mite population (79.24 % suppression), closely followed by avermectin (76.40 % suppression). Among bio-pesticides, avermectin and combination of neem with Spilanthes gave better results recording more than 70 % suppression. Neem and Spilanthes individually did not produce good results but when used as a mixture they recorded better results (70.66 % suppression).
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Claims 10
Claim · model-written summary
Red spider mite population peaked at 6.18 mites per leaf in the pre-kharif crop.
- Taxon
- Okra
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Abelmoschus esculentuse0 - Interactor
- Tetranychus urticae
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Tetranychus urticaet0pest - Outcome
- populatione1
- Value
- 6.18 mites/leafe1
- Setting
- pre-kharif crope1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
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Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e1“The pest was active throughout the growing period with a peak population (6.18 mites/leaf) during 23 rd SMW (last week of May) in the pre-kharif crop”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
Claim · model-written summary
Red spider mite population reached its highest level of 7.56 mites per leaf in the post kharif crop.
- Taxon
- OkraAbelmoschus esculentuse0
- Interactor
- Tetranychus urticaeTetranychus urticaet0pest
- Outcome
- populatione2
- Value
- 7.56/leafe2
- Setting
- post kharif crope2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e2“Highest population (7.56/leaf) was found on the 42 nd SMW (first week of October) in the post kharif crop”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
Claim · model-written summary
Red spider mite population suddenly fell in the last week of June because of heavy rains.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- heavy rainse3
- Interactor
- Tetranychus urticaeTetranychus urticaet0pest
- Outcome
- populatione3
- Direction
- Sudden falle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e3“Sudden fall of population was found in last week of June because of heavy rains”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
Claim · model-written summary
Red spider mite incidence was higher on the upper canopy of okra plants.
- Taxon
- OkraAbelmoschus esculentuse0
- Organ / stage
- upper canopye4
- Interactor
- Tetranychus urticaeTetranychus urticaet0pest
- Outcome
- incidence of mite populatione4
- Direction
- highere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e4“The incidence of mite population always remained higher on the upper canopy of the plant”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
Claim · model-written summary
Weekly mite population counts showed a non-significant positive correlation with temperature, maximum relative humidity and total rainfall.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- temperature, maximum relative humidity, total rainfalle5
- Interactor
- Tetranychus urticaeTetranychus urticaet0pest
- Outcome
- population counts on mitese5
- Direction
- positive correlatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e5“Weekly population counts on mites showed non-significant positive correlation (p=0.05) with temperature, maximum relative humidity, total rainfall and significant positive correlation with minimum and average relative humidity”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
Claim · model-written summary
Weekly mite population counts showed a significant positive correlation with minimum and average relative humidity.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- minimum and average relative humiditye5
- Interactor
- Tetranychus urticaeTetranychus urticaet0pest
- Outcome
- population counts on mitese5
- Direction
- positive correlatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e5“Weekly population counts on mites showed non-significant positive correlation (p=0.05) with temperature, maximum relative humidity, total rainfall and significant positive correlation with minimum and average relative humidity”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
Claim · model-written summary
Fenazaquin (Magister 10EC) at 2 ml/L gave the best suppression of red spider mite population on okra, at 79.24%.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- Fenazaquin (Magister 10EC) @ 2ml/Le6
- Interactor
- Tetranychus urticaeTetranychus urticaet0pest
- Outcome
- suppression of mite populatione7
- Direction
- beste7
- Value
- 79.24 %e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e6“Fenazaquin (Magister 10EC) @ 2ml/L”
e7“Fenazaquin resulted in the best suppression of mite population (79.24 % suppression)”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
Claim · model-written summary
Avermectin gave 76.40% suppression of red spider mite population on okra, closely behind fenazaquin.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- avermectine1
- Interactor
- Tetranychus urticaeTetranychus urticaet0pest
- Outcome
- suppressione1
- Direction
- increaseinferrede1
- Value
- 76.40 %e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e1“closely followed by avermectin (76.40 % suppression)”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
Claim · model-written summary
A mixture of neem and Spilanthes gave better suppression of red spider mite on okra, at 70.66%.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- used as a mixturee2
- Interactor
- Tetranychus urticaeTetranychus urticaet0pest
- Outcome
- suppressione2
- Direction
- bettere2
- Value
- 70.66 %e2
- Comparator
- Neem and Spilanthes individuallye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e1“Neem and Spilanthes individually did not produce good results”
e2“when used as a mixture they recorded better results (70.66 % suppression)”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
Claim · model-written summary
Neem and Spilanthes applied individually did not give good suppression of red spider mite on okra.
- Taxon
- OkraAbelmoschus esculentuse0
- Treatment
- Neem and Spilanthes individuallye1
- Interactor
- Tetranychus urticaeTetranychus urticaet0pest
- Outcome
- good resultse1
- Direction
- did not producee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Okra (Abelmoschus esculentus L.) is an annual vegetable crop”
e1“Neem and Spilanthes individually did not produce good results”
t0“Incidence of Red Spider Mite (Tetranychus urticae Koch) on ladysfinger (Abelmoschus esculentus (L.) Moench)”
The same questions in other papers
fenazaquin · Tetranychus urticae · Abelmoschus esculentus (okra)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
botanical · Tetranychus urticae · Abelmoschus esculentus (okra)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
1 paper more in this group
See all 5 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.