Abstract
Levels of plant nutrients, particularly nitrogen, can drastically alter insect herbivory. In agricultural systems, nutrients are intentionally altered via fertilization to increase plant productivity. Prior studies found that greater nitrogen fertilizer rates can increase crop injury by Lepidopteran stem borers. However, little has been done to evaluate how nitrogen rates impact herbivory in local sugarcane by the primary insect pest in Louisiana, the sugarcane borer, Diatraea saccharalis (F.) (Lepidoptera: Crambidae). To assess this, D. saccharalis injury and relative survival were evaluated at different nitrogen fertilization rates in 3 field trials conducted from 2017 to 2022, with 1 trial directly comparing yield metrics for 2 cultivars differing in D. saccharalis resistance. The influence of nitrogen rates on larval development was assessed in a single cultivar laboratory assay. Higher nitrogen rates resulted in greater D. saccharalis injury in all 3 cultivars tested and increased larval survival in 2 of the 3 cultivars. Greater nitrogen application corresponded with an increase in foliar nitrogen, phosphorous, and potassium, potentially increasing the nutritional benefit to D. saccharalis. The laboratory evaluation indicated larval weights were greatest and development time shortest in moderate nitrogen-addition treatments. Despite the increased injury and developmental success with greater nitrogen, stalk weights and yield increased, compensating for damage-related losses. The present study aligns with findings in other sugarcane growing regions that nitrogen increases stem borer injury but not necessarily yield loss. Therefore, the adverse effects of D. saccharalis associated with higher nitrogen were minimal on the overall productivity of the sugarcane cultivars evaluated.
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Claims 7
Claim · model-written summary
Higher nitrogen increased D. saccharalis injury in all three sugarcane cultivars.
- Taxon
- sugarcanet0
- Treatment
- Higher nitrogen ratese0
- Interactor
- D. saccharalis
Diatraea saccharalise0pest - Outcome
- D. saccharalis injurye0
- Direction
- greatere0
- Value
- all 3 cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher nitrogen rates resulted in greater D. saccharalis injury in all 3 cultivars tested”
t0“sugarcane cultivars”
Claim · model-written summary
Higher nitrogen increased larval survival in two of three sugarcane cultivars.
- Taxon
- sugarcanet0
- Treatment
- Higher nitrogen ratese0
- Interactor
- D. saccharalisDiatraea saccharalise0pest
- Outcome
- larval survivale0
- Direction
- increasede0
- Value
- 2 of the 3 cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher nitrogen rates resulted in greater D. saccharalis injury in all 3 cultivars tested and increased larval survival in 2 of the 3 cultivars”
t0“sugarcane cultivars”
Claim · model-written summary
Greater nitrogen increased foliar nitrogen, phosphorus and potassium.
Verbatim
e0“Greater nitrogen application corresponded with an increase in foliar nitrogen, phosphorous, and potassium”
t0“sugarcane cultivars”
Claim · model-written summary
Moderate nitrogen addition produced the greatest borer larval weight.
- Taxon
- sugarcanet0
- Treatment
- moderate nitrogen-addition treatmentse0
- Interactor
- Diatraea saccharalisDiatraea saccharalist0pest
- Outcome
- larval weightse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval weights were greatest and development time shortest in moderate nitrogen-addition treatments”
t0“Diatraea saccharalis (Lepidoptera: Crambidae) injury in select Louisiana sugarcane cultivars”
Claim · model-written summary
Moderate nitrogen addition produced the shortest borer larval development time.
- Taxon
- sugarcanet0
- Treatment
- moderate nitrogen-addition treatmentse0
- Interactor
- Diatraea saccharalisDiatraea saccharalist0pest
- Outcome
- development timee0
- Direction
- shorteste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“larval weights were greatest and development time shortest in moderate nitrogen-addition treatments”
t0“Diatraea saccharalis (Lepidoptera: Crambidae) injury in select Louisiana sugarcane cultivars”
Claim · model-written summary
Greater nitrogen increased sugarcane stalk weights despite increased borer injury.
- Taxon
- sugarcanet0
- Treatment
- greater nitrogene0
- Interactor
- Diatraea saccharalisDiatraea saccharalist0pest
- Outcome
- stalk weightse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite the increased injury and developmental success with greater nitrogen, stalk weights and yield increased”
t0“Diatraea saccharalis (Lepidoptera: Crambidae) injury in select Louisiana sugarcane cultivars”
Claim · model-written summary
Greater nitrogen increased sugarcane yield despite increased borer injury.
- Taxon
- sugarcanet0
- Treatment
- greater nitrogene0
- Interactor
- Diatraea saccharalisDiatraea saccharalist0pest
- Outcome
- yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite the increased injury and developmental success with greater nitrogen, stalk weights and yield increased”
t0“Diatraea saccharalis (Lepidoptera: Crambidae) injury in select Louisiana sugarcane cultivars”
The same questions in other papers
nitrogen · Diatraea saccharalis · Saccharum officinarum (sugarcane)Positive and negative results
1 in the opposite direction
- negative
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.