Abstract
Laboratory bioassay of Bacillus thuringiensis (Bt) were conducted using larva e of the diamond back moth(DBM), Plutella xylostela fed with vegetable leaves of various growth stages.The leaves were dipped in the Bt solution.The results showed that the difference in the growth stage of the vegetable leaves had a sig nificant effect on the LC 50 of the Bt solution to DBM.The LC 50 obtai ned with leaves picked at the peak vegetative growth stage was 4 times higher th an that with leaves of the late vegetative growth stage.It is thus important to use plant material of standard growth stage in the bioassay for Bt preparations.
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Claims 3
Claim · model-written summary
Leaf growth stage significantly affected the Bt LC 50 for diamond back moth larvae.
- Taxon
- vegetable leavese0
- Organ / stage
- growth stagee0
- Interactor
- DBMe0pest
- Outcome
- LC 50 of the Bt solution to DBMe0
Not reportedComparatorValue
Verbatim
e0“The results showed that the difference in the growth stage of the vegetable leaves had a sig nificant effect on the LC 50 of the Bt solution to DBM.”
Claim · model-written summary
The Bt LC 50 with peak vegetative growth leaves was four times that with late vegetative growth leaves.
Verbatim
e0“The LC 50 obtai ned with leaves picked at the peak vegetative growth stage was 4 times higher th an that with leaves of the late vegetative growth stage.”
t0“vegetable leaves of various growth stages”
Claim · model-written summary
The authors recommend standardizing plant material growth stage in Bt bioassays.
Verbatim
e0“It is thus important to use plant material of standard growth stage in the bioassay for Bt preparations.”
t0“vegetable leaves of various growth stages”