Paper · 1957 · Nematologica

A Method for Determination of the Infectivity of Heterodera Rostochiensis Larvae

Victor H. Dropkin

4
claims
8
verbatim quotes
4
citations
2
research areas
—
Not open access

Abstract

A bioassay system for the measurement of the ability of nematode larvae to enter plant roots is likely to be useful in many ways. Simple procedure in which larval entry is complete within 48 hours is described. Exposures to single larvae yield results comparable to exposures to groups of 25 larvae. Infectivity declines as larvae are stored in water. No correlation between motility and infectivity of stored larvae was found.

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 4

Method / resourceobservedoriginal resultmeasured

Claim · model-written summary

The bioassay completes larval entry into plant roots within 48 hours.

Taxon
plant rootse0
Interactor
nematode larvaee0pest
Outcome
larval entrye1
Value
within 48 hourse1

Verbatim

e0

“A bioassay system for the measurement of the ability of nematode larvae to enter plant roots is likely to be useful in many ways”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e1

“Simple procedure in which larval entry is complete within 48 hours is described”

✓ located verbatim in the source · abstract, characters 130–209 · show in text ↑
Method / resourceobservedoriginal resultno effectmeasured

Claim · model-written summary

Exposure to single larvae gave results comparable to exposure to groups of 25 larvae.

Taxon
plant rootse0
Interactor
nematode larvaee0pest
Outcome
resultse2
Comparator
groups of 25 larvaee2

Verbatim

e0

“A bioassay system for the measurement of the ability of nematode larvae to enter plant roots is likely to be useful in many ways”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e2

“Exposures to single larvae yield results comparable to exposures to groups of 25 larvae”

✓ located verbatim in the source · abstract, characters 211–298 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Infectivity of nematode larvae declines when they are stored in water.

Taxon
plant rootse0
Treatment
stored in watere3
Interactor
nematode larvaee0pest
Outcome
Infectivitye3
Direction
declinese3

Verbatim

e0

“A bioassay system for the measurement of the ability of nematode larvae to enter plant roots is likely to be useful in many ways”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e3

“Infectivity declines as larvae are stored in water”

✓ located verbatim in the source · abstract, characters 300–350 · show in text ↑
Associationobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

No correlation was found between motility and infectivity of stored nematode larvae.

Taxon
plant rootse0
Interactor
nematode larvaee0pest
Outcome
infectivitye4
Direction
no_changeinferrede4
Qualifier
motilitye4

Verbatim

e0

“A bioassay system for the measurement of the ability of nematode larvae to enter plant roots is likely to be useful in many ways”

✓ located verbatim in the source · abstract, characters 0–128 · show in text ↑
e4

“No correlation between motility and infectivity of stored larvae was found”

✓ located verbatim in the source · abstract, characters 352–426 · show in text ↑