Abstract
Abstract Plants can respond to damage by pests with both induced direct defences and indirect defences by the attraction of their natural enemies. Foliar application of several plant‐derived chemicals, such as salicylic acid and oxalic acid, can induce these defence mechanisms. The effect of acetylsalicylic acid and oxalic acid on the aphid Myzus persicae Sulzer (Homoptera: Aphididae) and its parasitoid Aphidius colemani Viereck (Hymenoptera: Aphidiidae) was investigated. Experiments were carried out with direct application of acetylsalicylic and oxalic acids on these insects, as well as choice and no‐choice tests using foliar application of both chemicals on Brussels sprouts plants, Brassica oleracea var. gemmifera L. (Brassicaceae). Parasitoids were given a choice between treated and untreated plants for oviposition, and the effects of the chemicals on aphid and parasitoid development were determined. Although direct application of both chemicals increased aphid mortality, their foliar application did not induce resistance against aphids. The foliar application of such compounds, even in low concentration as shown in the choice tests, has the potential to induce indirect plant defences against aphids by encouraging aphid parasitisation. Although the direct application of both chemicals reduced parasitoid emergence from their hosts, the foliar application of acetylsalicylic acid and low concentrations of oxalic acid did not have a negative effect on parasitoid emergence ability. However, 10 m m oxalic acid reduced the number of emerged parasitoids in no‐choice experiments. This study shows that foliar application of acetylsalicylic and oxalic acids has the potential to encourage aphid parasitisation, but care is needed as high concentrations of oxalic acid can have a negative effect on these beneficial organisms.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Direct acetylsalicylic acid application increased aphid mortality.
- Taxon
- Brussels sprouts plants
Brassica oleracea var. gemmiferae2 - Treatment
- acetylsalicylic acide1
- Outcome
- aphid mortalitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although direct application of both chemicals increased aphid mortality”
e1“acetylsalicylic acid and oxalic acid”
e2“Brussels sprouts plants, Brassica oleracea var. gemmifera L.”
Claim · model-written summary
Direct oxalic acid application increased aphid mortality.
- Taxon
- Brussels sprouts plantsBrassica oleracea var. gemmiferae2
- Treatment
- oxalic acide1
- Outcome
- aphid mortalitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although direct application of both chemicals increased aphid mortality”
e1“acetylsalicylic acid and oxalic acid”
e2“Brussels sprouts plants, Brassica oleracea var. gemmifera L.”
Claim · model-written summary
Foliar chemical application did not induce aphid resistance.
- Taxon
- Brussels sprouts plantsBrassica oleracea var. gemmiferae1
- Treatment
- foliar applicatione0
- Outcome
- resistance against aphidse0
- Direction
- did not inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their foliar application did not induce resistance against aphids”
e1“Brussels sprouts plants, Brassica oleracea var. gemmifera L.”
Claim · model-written summary
Foliar application encouraged aphid parasitisation.
- Taxon
- Brussels sprouts plantsBrassica oleracea var. gemmiferae1
- Treatment
- foliar application of acetylsalicylic and oxalic acidse0
- Outcome
- aphid parasitisatione0
- Direction
- encouragee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of acetylsalicylic and oxalic acids has the potential to encourage aphid parasitisation”
e1“Brussels sprouts plants, Brassica oleracea var. gemmifera L.”
Claim · model-written summary
Direct application of both chemicals reduced parasitoid emergence.
- Taxon
- Brussels sprouts plantsBrassica oleracea var. gemmiferae1
- Treatment
- direct application of both chemicalse0
- Outcome
- parasitoid emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“direct application of both chemicals reduced parasitoid emergence from their hosts”
e1“Brussels sprouts plants, Brassica oleracea var. gemmifera L.”
Claim · model-written summary
Foliar acetylsalicylic acid did not harm parasitoid emergence ability.
- Taxon
- Brussels sprouts plantsBrassica oleracea var. gemmiferae1
- Treatment
- foliar application of acetylsalicylic acide0
- Outcome
- parasitoid emergence abilitye0
- Direction
- did not have a negative effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of acetylsalicylic acid and low concentrations of oxalic acid did not have a negative effect on parasitoid emergence ability”
e1“Brussels sprouts plants, Brassica oleracea var. gemmifera L.”
Claim · model-written summary
Low foliar oxalic acid did not harm parasitoid emergence ability.
- Taxon
- Brussels sprouts plantsBrassica oleracea var. gemmiferae1
- Treatment
- low concentrations of oxalic acide0
- Outcome
- parasitoid emergence abilitye0
- Direction
- did not have a negative effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of acetylsalicylic acid and low concentrations of oxalic acid did not have a negative effect on parasitoid emergence ability”
e1“Brussels sprouts plants, Brassica oleracea var. gemmifera L.”
Claim · model-written summary
Ten mM oxalic acid reduced parasitoid emergence in no-choice tests.
- Taxon
- Brussels sprouts plantsBrassica oleracea var. gemmiferae1
- Treatment
- 10 m m oxalic acide0
- Outcome
- number of emerged parasitoidse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10 m m oxalic acid reduced the number of emerged parasitoids in no‐choice experiments”
e1“Brussels sprouts plants, Brassica oleracea var. gemmifera L.”
The same questions in other papers
application · disease · Brassica oleracea (wild cabbage)Positive and negative results
6 papers in the same direction as this paper · 22 in the opposite direction
- positive
- positive
- positive
25 papers more in this group
See all 29 papers →application · growth · Brassica oleracea (wild cabbage)Positive and negative results
4 papers in the same direction as this paper · 74 in the opposite direction
- positive
- positive
- positive
75 papers more in this group
See all 79 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.