Abstract
ABSTRACT The sex ratio of Diaeretiella rapae was found to be density dependent. It was observed that the sex ratio decreased with the increase of parasitoid density. The decrease in the sex ratio, i.e. production of more males than females, was maximum in the case of Raphanus sativus-bred aphids and minimum in Brassica oleracea-bred aphids, while Brassica campestris-bred aphids occupied an intermediate position. The texture of leaf surface and possibly the allomones of food plants have been suggested as influencing the sex ratio. Results showed that to obtain maximum female progeny, a low release of parasitoids at any release site would be better. With increasing host density, the sex ratio of the parasitoid first of all increased and, thereafter, formed a plateau in the case of all the aphids bred on the three food plants tested. The non-linear correlation coefficient was found to be significant in the case of all the three food plants tested.
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
Parasitoid offspring sex ratio declined with increasing parasitoid density.
Not reportedTaxonInteractor
Verbatim
e0“the sex ratio decreased with the increase of parasitoid density”
t0“Food Plants”
Claim · model-written summary
The sex-ratio decline was greatest on Raphanus sativus-bred aphids.
- Taxon
- Raphanus sativus
Raphanus sativuse0 - Interactor
- aphidsAphidomorphae0pest
- Outcome
- sex ratioe0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease in the sex ratio, i.e. production of more males than females, was maximum in the case of Raphanus sativus-bred aphids”
Claim · model-written summary
The sex-ratio decline was smallest on Brassica oleracea-bred aphids.
- Taxon
- Brassica oleracea
Brassica oleraceae0 - Interactor
- aphidsAphidomorphae0pest
- Outcome
- minimume0
- Direction
- minimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“minimum in Brassica oleracea-bred aphids”
Claim · model-written summary
Brassica campestris-bred aphids had an intermediate sex-ratio decline.
- Taxon
- Brassica campestris
.jpg?width=60)
Brassica rapa subsp. oleiferae0 - Interactor
- aphidsAphidomorphae0pest
- Outcome
- intermediate positione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Brassica campestris-bred aphids occupied an intermediate position”
Claim · model-written summary
Authors suggested leaf texture and food-plant allomones may influence parasitoid sex ratio.
Verbatim
e0“The texture of leaf surface and possibly the allomones of food plants have been suggested as influencing the sex ratio”
Claim · model-written summary
A low parasitoid release was recommended to maximize female progeny.
Not reportedTaxon
Verbatim
e0“to obtain maximum female progeny, a low release of parasitoids at any release site would be better”
t0“Food Plants”
Claim · model-written summary
Parasitoid sex ratio first increased with host density and then plateaued across the three food plants.
Verbatim
e0“With increasing host density, the sex ratio of the parasitoid first of all increased and, thereafter, formed a plateau in the case of all the aphids bred on the three food plants tested”
Claim · model-written summary
The nonlinear correlation was significant for all three food plants.
Not reportedDirection
Verbatim
e0“The non-linear correlation coefficient was found to be significant in the case of all the three food plants tested”