Abstract
The diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), one of the principal pests of brassicas, can reduce productivity and thus cause losses for brassica farmers. Alternative controls, such as biological agents and plant extracts, may be used to reduce insect populations, either alone or in conjunction with pest management programs. The objective was to evaluate the insecticidal activity of Beauveria bassiana (Bals.) Vuill. and castor bean oil and mixtures of both components against the diamondback moth. To do so, we separately used castor bean oil (at 2% concentration), the isolate ESALQ-447 and a commercial formulation (Boveril® WP), and a mixture of castor bean oil with the isolate and the B. bassiana product formulation, totaling six treatments with a control. Assays were carried out under greenhouse with the respective treatments sprayed on cabbage plants infested with four second instar larvae of P. xylostella. The evaluated parameters were larval mortality and pupal and larval viability. All treatments reduced larval viability in relation to the control, however, only the ESALQ-447 isolate or a mixture of the isolate with castor bean oil reduced pupal viability, significantly reducing the pest population levels in the next generation. Castor bean oil mixed with B. bassiana, however, does not augment pest mortality.
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Claims 6
Claim · model-written summary
Castor bean oil reduced P. xylostella larval viability relative to the control on cabbage.
- Taxon
- cabbage plants
Brassica oleracea var. capitatae2 - Treatment
- castor bean oil (at 2% concentration)e1
- Interactor
- P. xylostellae2pest
- Outcome
- larval viabilitye0
- Direction
- reducede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All treatments reduced larval viability in relation to the control”
e1“castor bean oil (at 2% concentration)”
e2“cabbage plants infested with four second instar larvae of P. xylostella”
Claim · model-written summary
The ESALQ-447 isolate reduced P. xylostella larval viability relative to the control on cabbage.
- Taxon
- cabbage plantsBrassica oleracea var. capitatae2
- Treatment
- the isolate ESALQ-447e1
- Interactor
- P. xylostellae2pest
- Second interactor
- Beauveria bassiana
Beauveria bassianae3biocontrol_agent - Outcome
- larval viabilitye0
- Direction
- reducede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All treatments reduced larval viability in relation to the control”
e1“the isolate ESALQ-447”
e2“cabbage plants infested with four second instar larvae of P. xylostella”
e3“Beauveria bassiana (Bals.) Vuill.”
Claim · model-written summary
Boveril WP reduced P. xylostella larval viability relative to the control on cabbage.
- Taxon
- cabbage plantsBrassica oleracea var. capitatae2
- Treatment
- Boveril® WPe1
- Interactor
- P. xylostellae2pest
- Outcome
- larval viabilitye0
- Direction
- reducede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All treatments reduced larval viability in relation to the control”
e1“a commercial formulation (Boveril® WP)”
e2“cabbage plants infested with four second instar larvae of P. xylostella”
Claim · model-written summary
The ESALQ-447 isolate reduced P. xylostella pupal viability on cabbage.
- Taxon
- cabbage plantsBrassica oleracea var. capitatae1
- Treatment
- ESALQ-447 isolatee0
- Interactor
- P. xylostellae1pest
- Outcome
- pupal viabilitye0
- Direction
- reducede0
- Comparator
- the controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only the ESALQ-447 isolate or a mixture of the isolate with castor bean oil reduced pupal viability”
e1“cabbage plants infested with four second instar larvae of P. xylostella”
e2“in relation to the control”
Claim · model-written summary
A mixture of the ESALQ-447 isolate with castor bean oil reduced P. xylostella pupal viability on cabbage.
- Taxon
- cabbage plantsBrassica oleracea var. capitatae1
- Treatment
- a mixture of the isolate with castor bean oile0
- Interactor
- P. xylostellae1pest
- Outcome
- pupal viabilitye0
- Direction
- reducede0
- Comparator
- the controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only the ESALQ-447 isolate or a mixture of the isolate with castor bean oil reduced pupal viability”
e1“cabbage plants infested with four second instar larvae of P. xylostella”
e2“in relation to the control”
Claim · model-written summary
Castor bean oil mixed with B. bassiana did not augment pest mortality.
- Taxon
- cabbage plantsBrassica oleracea var. capitatae1
- Treatment
- Castor bean oil mixed with B. bassianae0
- Interactor
- P. xylostellae1pest
- Second interactor
- B. bassianaBeauveria bassianae0biocontrol_agent
- Outcome
- pest mortalitye0
- Direction
- does not augmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Castor bean oil mixed with B. bassiana, however, does not augment pest mortality”
e1“cabbage plants infested with four second instar larvae of P. xylostella”
The same questions in other papers
Ricinus communis · growth · Brassica oleracea (wild cabbage)Positive and negative results
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- negative
- positive
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1 paper more in this group
See all 5 papers →Beauveria bassiana · pest · Brassica oleracea (wild cabbage)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.