Abstract
The efficacies of biological and conventional chemical insecticides against two major insect pests of alfalfa (aphids and thrips) were compared in three sites across China’s alfalfa belt. In addition, the persistence of the residues of chemical insecticides in alfalfa and their influence on the quality of alfalfa hay were examined. Efficacy varied among the different biological and chemical insecticides. The chemical insecticides were significantly more effective than biopesticides in a short time-frame. The efficacy period of biopesticides was significantly longer than that of chemical insecticides, and the corrected mortality rate of aphids in all regions was above 50% at 14 days after application. The analysis of pesticide residues showed that the residual doses of all the pesticides were within the allowed ranges after the safe period. The acid detergent fiber and neutral detergent fiber contents in alfalfa hay were higher and the protein content was lower in chemical insecticide treatments than in biopesticide treatments in Hebei. The relative feeding value of alfalfa hay treated with Metarhizium anisopliae IPP330189 was the highest among the treatments. Compared with chemical insecticides, the yield of alfalfa hay was higher in the biopesticides treatments. Biopesticides show a stronger control effect on insect populations and also a better improvement in the quality of alfalfa hay than chemical insecticides. This study provides a basis for exploring and developing a comprehensive control regime for alfalfa insect pests in the different alfalfa-growing regions in China, and for reducing chemical insecticide usage and improving forage quality.
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Claims 8
Claim · model-written summary
Chemical insecticides were more effective than biopesticides in the short term.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- chemical insecticidese0
- Outcome
- effectivee0
- Direction
- more effectivee0
- Qualifier
- in a short time-framee0
- Comparator
- biopesticidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chemical insecticides were significantly more effective than biopesticides in a short time-frame.”
t0“alfalfa crops”
Claim · model-written summary
Biopesticides had a longer efficacy period than chemical insecticides.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- biopesticidese0
- Outcome
- efficacy periode0
- Direction
- longere0
- Comparator
- chemical insecticidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The efficacy period of biopesticides was significantly longer than that of chemical insecticides”
t0“alfalfa crops”
Claim · model-written summary
Aphid mortality after biopesticide application exceeded 50% at 14 days in all regions.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- biopesticidese1
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- corrected mortality rate of aphidse0
- Direction
- abovee0
- Value
- 50%e0
- Qualifier
- 14 days after applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the corrected mortality rate of aphids in all regions was above 50% at 14 days after application”
e1“The efficacy period of biopesticides”
t0“alfalfa crops”
Claim · model-written summary
Pesticide residues were within allowed ranges after the safe period.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- residual doses of all the pesticidese0
- Qualifier
- within the allowed ranges after the safe periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the residual doses of all the pesticides were within the allowed ranges after the safe period”
t0“alfalfa crops”
Claim · model-written summary
Chemical insecticide treatments produced higher acid and neutral detergent fiber contents than biopesticides in Hebei.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- chemical insecticide treatmentse0
- Outcome
- acid detergent fiber and neutral detergent fiber contentse0
- Direction
- highere0
- Comparator
- biopesticide treatmentse0
- Setting
- Hebeie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The acid detergent fiber and neutral detergent fiber contents in alfalfa hay were higher and the protein content was lower in chemical insecticide treatments than in biopesticide treatments in Hebei.”
Claim · model-written summary
Chemical insecticide treatments produced lower hay protein than biopesticides in Hebei.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- chemical insecticide treatmentse0
- Outcome
- protein contente0
- Direction
- lowere0
- Comparator
- biopesticide treatmentse0
- Setting
- Hebeie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The acid detergent fiber and neutral detergent fiber contents in alfalfa hay were higher and the protein content was lower in chemical insecticide treatments than in biopesticide treatments in Hebei.”
Claim · model-written summary
Hay treated with Metarhizium anisopliae IPP330189 had the highest relative feeding value.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- treated with Metarhizium anisopliae IPP330189e0
- Interactor
- Metarhizium anisopliae IPP330189
Metarhizium anisopliaee0biocontrol_agent - Outcome
- relative feeding valuee0
- Direction
- higheste0
- Comparator
- the treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative feeding value of alfalfa hay treated with Metarhizium anisopliae IPP330189 was the highest among the treatments.”
Claim · model-written summary
Biopesticide treatments yielded more alfalfa hay than chemical insecticides.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- biopesticides treatmentse0
- Outcome
- yield of alfalfa haye0
- Direction
- highere0
- Comparator
- chemical insecticidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with chemical insecticides, the yield of alfalfa hay was higher in the biopesticides treatments.”
The same questions in other papers
insecticide · quality: protein · Medicago sativa (alfalfa)Results differ
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
biocontrol · control · Medicago sativa (alfalfa)Positive and negative results
1 in the opposite direction
- negative
insecticide · quality: grain · Medicago sativa (alfalfa)Results agree
1 paper in the same direction as this paper
- no effect
biocontrol · yield · Medicago sativa (alfalfa)Results agree
1 paper in the same direction as this paper
- 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.