Abstract
The efficacy of spinosad against the diamondback moth (DBM) on cabbage was studied at Botswana College of Agriculture, Gaborone, Botswana in 2011. Using five concentrations of spinosad: 0.12, 0.36, 0.60, 0.84 and 1.08 g/L, bioassays were conducted against DBM eggs and second instar larvae at 30°C ± 5°C. Each treatment was replicated three times. Probit analysis was used to determine LD 50 and LD 90 values for the treatments against eggs and larvae. When the treatments were assessed at 72 and 96 hours, LD 90 values against larvae were 0.74 and 0.59 g/L, whereas they were 0.35 and 0.32 g/L against eggs. This indicated that spinosad was more effective against eggs than against larvae. The slopes of the probit lines for larvae assessed at 48, 72 and 96 hours after application were 3.519, 3.810 and 3.427, while those against eggs were 1.725, 1.316 and 1.086. This indicates that there was a more rapid change in larval mortality with increase in pesticide dosage than in egg mortality. The study shows that spinosad can achieve effective control of DBM eggs and larvae under Botswana conditions.
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Claims 3
Claim · model-written summary
Spinosad was more effective against diamondback moth eggs than against larvae, with LD90 values of 0.35 and 0.32 g/L for eggs versus 0.74 and 0.59 g/L for larvae.
- Taxon
- cabbage
Brassica oleracea var. capitatae1 - Treatment
- spinosade1
- Interactor
- diamondback moth
Plutella xylostellae1pest - Outcome
- effective against eggse2
- Direction
- more effectivee2
- Value
- 0.35 and 0.32 g/Le3
- Qualifier
- 72 and 96 hourse4
- Comparator
- larvaee2
- Setting
- Botswana College of Agriculture, Gaborone, Botswanae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The efficacy of spinosad against the diamondback moth (DBM) on cabbage was studied at Botswana College of Agriculture, Gaborone, Botswana in 2011”
e2“This indicated that spinosad was more effective against eggs than against larvae”
e3“LD 90 values against larvae were 0.74 and 0.59 g/L, whereas they were 0.35 and 0.32 g/L against eggs”
e4“When the treatments were assessed at 72 and 96 hours”
Claim · model-written summary
Larval mortality changed more rapidly with spinosad dose than egg mortality, with probit slopes of 3.519, 3.810 and 3.427 for larvae versus 1.725, 1.316 and 1.086 for eggs.
- Taxon
- cabbageBrassica oleracea var. capitatae1
- Treatment
- increase in pesticide dosagee6
- Interactor
- diamondback mothPlutella xylostellae1pest
- Outcome
- change in larval mortalitye6
- Direction
- more rapide6
- Value
- 3.519, 3.810 and 3.427e5
- Comparator
- egg mortalitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The efficacy of spinosad against the diamondback moth (DBM) on cabbage was studied at Botswana College of Agriculture, Gaborone, Botswana in 2011”
e5“The slopes of the probit lines for larvae assessed at 48, 72 and 96 hours after application were 3.519, 3.810 and 3.427, while those against eggs were 1.725, 1.316 and 1.086”
e6“This indicates that there was a more rapid change in larval mortality with increase in pesticide dosage than in egg mortality”
Claim · model-written summary
Spinosad can achieve effective control of diamondback moth eggs and larvae under Botswana conditions.
- Taxon
- cabbageBrassica oleracea var. capitatae1
- Treatment
- spinosade7
- Interactor
- DBMe7pest
- Outcome
- effective control of DBM eggs and larvaee7
- Setting
- Botswana conditionse7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The efficacy of spinosad against the diamondback moth (DBM) on cabbage was studied at Botswana College of Agriculture, Gaborone, Botswana in 2011”
e7“The study shows that spinosad can achieve effective control of DBM eggs and larvae under Botswana conditions”
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spinosad · Plutella xylostella · Brassica oleracea (wild cabbage)Positive and negative results
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See all 24 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.