Abstract
The complete uprooting of diseased mats/fields (CMU) is one of the recommended control options for Xanthomonas wilt of banana. CMU is labour intensive, time consuming and disturbs the soil structure, exposing fields to erosion. CMU often involves exportation of whole plant biomass, affecting soil fertility. The potential of continuous cutting at soil level of all shoots in a mat until complete corm decay in situ as an alternative to CMU was assessed. The first experiment was established using 224 banana mats in their third cropping cycle. All the plants were cut down at soil level, meristems were removed, and sweet potato and bush bean planted. In a repeat experiment with 180 banana mats, a wide range of treatments were applied on top by cutting and removing the apical meristems. These included the: injection of 2,4-D herbicide into the centre of each corm; removal of a cone shaped section from the center of each corm; and creation of a 20 cm deep incision in the center of each corm; in combination with the application of soil or farmyard manure substrate on cut surface. In the first experiment, re-sprouting stopped at 8 months while corms fully decayed after 25 months. Annual intercrops did not influence re-sprouting and corm decay rate. Similar re-sprouting trends occured in the repeat experiment. However, 2,4-D application significantly (P<0.05) lowered decay time, with 12-47% of corms decomposed at 8 months compared with 0-20% in other treatments without 2,4-D. In the 2,4-D treatments, 100% of corms had decomposed compared with 36-80% in other treatments by the 20th month. Deep incisions or cuts did not significantly hasten decomposition. Soil or manure substrate addition had no advantage when compared with the cut surfaces without substrates. A cost-benefit analysis showed a five times higher net income with continuous cutting of re-sprouts when compared with CMU. Key words: Apical meristems, cost-benefit analysis, decomposition, herbicide, soil, Xanthomonas wilt.
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Claims 9
Claim · model-written summary
In the first experiment, re-sprouting of banana mats stopped at 8 months under continuous cutting at soil level.
- Taxon
- bananae1
- Treatment
- continuous cutting at soil level of all shoots in a mat until complete corm decay in situe3
- Outcome
- re-sproutinge2
- Value
- 8 monthse2
Not reportedDirection
Verbatim
e1“The first experiment was established using 224 banana mats in their third cropping cycle”
e2“In the first experiment, re-sprouting stopped at 8 months”
e3“continuous cutting at soil level of all shoots in a mat until complete corm decay in situ”
Claim · model-written summary
In the first experiment, corms of banana mats fully decayed after 25 months.
Not reportedDirection
Verbatim
e1“The first experiment was established using 224 banana mats in their third cropping cycle”
e4“corms fully decayed after 25 months”
Claim · model-written summary
Annual intercrops did not influence re-sprouting or corm decay rate of banana mats.
- Taxon
- bananae1
- Treatment
- Annual intercropse5
- Outcome
- re-sprouting and corm decay ratee5
- Direction
- did not influencee5
Not reportedComparator
Verbatim
e1“The first experiment was established using 224 banana mats in their third cropping cycle”
e5“Annual intercrops did not influence re-sprouting and corm decay rate”
Claim · model-written summary
Re-sprouting trends in the repeat experiment were similar to those of the first experiment.
Not reportedDirection
Verbatim
e1“The first experiment was established using 224 banana mats in their third cropping cycle”
e6“Similar re-sprouting trends occured in the repeat experiment”
Claim · model-written summary
2,4-D application significantly lowered the decay time of banana corms, with 12-47% decomposed at 8 months versus 0-20% in other treatments.
Verbatim
e1“The first experiment was established using 224 banana mats in their third cropping cycle”
e7“2,4-D application significantly (P<0.05) lowered decay time, with 12-47% of corms decomposed at 8 months compared with 0-20% in other treatments without 2,4-D”
Claim · model-written summary
In the 2,4-D treatments, 100% of banana corms had decomposed by the 20th month, versus 36-80% in other treatments.
Verbatim
e1“The first experiment was established using 224 banana mats in their third cropping cycle”
e2“In the 2,4-D treatments, 100% of corms had decomposed compared with 36-80% in other treatments by the 20th month”
Claim · model-written summary
Deep incisions or cuts did not significantly hasten corm decomposition in banana.
- Taxon
- bananae1
- Treatment
- Deep incisions or cutse2
- Outcome
- decompositione2
- Direction
- did not significantly hastene2
Not reportedComparator
Verbatim
e1“The first experiment was established using 224 banana mats in their third cropping cycle”
e2“Deep incisions or cuts did not significantly hasten decomposition”
Claim · model-written summary
Soil or manure substrate addition on cut corm surfaces had no advantage over cut surfaces without substrates.
Verbatim
e1“The first experiment was established using 224 banana mats in their third cropping cycle”
e2“Soil or manure substrate addition had no advantage when compared with the cut surfaces without substrates”
Claim · model-written summary
Continuous cutting of re-sprouts gave a five times higher net income than complete mat uprooting in a cost-benefit analysis.
Verbatim
e1“The first experiment was established using 224 banana mats in their third cropping cycle”
e2“A cost-benefit analysis showed a five times higher net income with continuous cutting of re-sprouts when compared with CMU”
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See all 7 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.