Abstract
Loss of foliage in mungbean [Vigna radiata (L.) Wilczek] crop through leaf eating insects and diseases is common in tropical and sub-tropical countries where farmers do not protect their crops adequately. Experiments were carried out with eight levels of defoliations (0, 25, 50 and 75% either from top or from base of the canopy, and 100%) to investigate the growth, reproductive characters, and yield attributes in two high and two low yielding mungbean genotypes. Results revealed that degrees of defoliations parallely decreased leaf area and total dry matter (TDM) production irrespective of seasons and genotypes. Defoliation not only reduced source sizes but also decreased total sink (flower) production resulting in lower pod and seed yields. However, basal 25% defoliation did not significantly decrease TDM and seed yield plant-1 indicating the fact that the mungbean plant, in general, can tolerate 25% basal leaf loss of the canopy. Furthermore, the high yielding genotypes showed higher compensatory mechanism of source loss than the low yielders. Exceeding this threshold limit (> 25%) either from the base or from the top of the canopy defoliation significantly reduced TDM and seed yield. Reduction in yield was higher with top defoliation than basal defoliation. Implication of the results in relation to pest management is also discussed.
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Claims 7
Claim · model-written summary
Increasing defoliation decreased leaf area and total dry matter across seasons and genotypes.
- Taxon
- mungbean
.jpg?width=60)
Vigna radiatat0 - Treatment
- degrees of defoliationse0
- Outcome
- leaf area and total dry matter (TDM) productione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“degrees of defoliations parallely decreased leaf area and total dry matter (TDM) production irrespective of seasons and genotypes”
t0“mungbean”
Claim · model-written summary
Defoliation decreased flower production.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- Defoliatione0
- Outcome
- total sink (flower) productione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Defoliation not only reduced source sizes but also decreased total sink (flower) production resulting in lower pod and seed yields.”
t0“mungbean”
Claim · model-written summary
Defoliation lowered pod and seed yields.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- Defoliatione0
- Outcome
- pod and seed yieldse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Defoliation not only reduced source sizes but also decreased total sink (flower) production resulting in lower pod and seed yields.”
t0“mungbean”
Claim · model-written summary
Basal 25% defoliation did not significantly decrease dry matter or seed yield per plant.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- basal 25% defoliatione0
- Outcome
- TDM and seed yield plant-1e0
- Direction
- did not significantly decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“basal 25% defoliation did not significantly decrease TDM and seed yield plant-1”
t0“mungbean”
Claim · model-written summary
High yielding genotypes compensated source loss more than low yielding genotypes.
- Taxon
- mungbeanVigna radiatat0
- Material
- high yielding genotypese0
- Outcome
- compensatory mechanism of source losse0
- Direction
- highere0
- Comparator
- low yielderse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the high yielding genotypes showed higher compensatory mechanism of source loss than the low yielders”
t0“mungbean”
Claim · model-written summary
Defoliation exceeding 25% significantly reduced dry matter and seed yield.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- > 25%e0
- Outcome
- TDM and seed yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exceeding this threshold limit (> 25%) either from the base or from the top of the canopy defoliation significantly reduced TDM and seed yield.”
t0“mungbean”
Claim · model-written summary
Top defoliation reduced yield more than basal defoliation.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- top defoliatione0
- Outcome
- Reduction in yielde0
- Direction
- highere0
- Comparator
- basal defoliatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduction in yield was higher with top defoliation than basal defoliation.”
t0“mungbean”
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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.