Abstract
ABSTRACT: In the scientific toxicity evaluations of insecticides against larvae of Tuta absoluta (Tomato pinworm), a leaf coverage rate of 100 % or very close to this value is sought to guarantee the contact of the insect with the chemical product. However, deposition can change according to the different pesticide application methods used in field productions; consequently, interfering with pest control. From this perspective, this study evaluated the mortality of Tuta absoluta and the deposited volume dispersion on tomato leaflets as a function of droplet sizes and the method of chemical treatment with abamectin. For that purpose, an experiment was conducted in a randomized block design with five treatments and five replications. The treatments consisted of different chemical treatment methods: immersion, hydraulic spraying with three droplet sizes, and pneumatic spraying, in which the following parameters were evaluated: larval mortality, volume retained (deposition), surface density of active ingredient, droplet density, and coverage percentage. The different chemical treatments with abamectin provided larval mortality rates above 90%. Furthermore, the highest mortality values (98% and 95.9%) were associated; respectively, with the sprayings that provided the highest droplet densities: hydraulic spraying with average droplets (181 droplets cm-2) and pneumatic spraying with very fine droplets (256 droplets cm-2), the latter using an application volume 84% lower (80 L ha-1) than the lowest volume recommended by the manufacturer (500 L ha-1).
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Claims 4
Claim · model-written summary
Abamectin treatments gave Tuta absoluta larval mortality above 90%.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- chemical treatments with abamectine0
- Interactor
- Tuta absoluta
.jpg?width=60)
Tuta absolutae1pest - Outcome
- larval mortality ratese0
- Direction
- abovee0
- Value
- 90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The different chemical treatments with abamectin provided larval mortality rates above 90%”
e1“mortality of Tuta absoluta and the deposited volume dispersion on tomato leaflets”
Claim · model-written summary
Hydraulic spraying with average droplets gave 98% Tuta absoluta mortality.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- hydraulic spraying with average dropletse0
- Interactor
- Tuta absolutaTuta absolutae1pest
- Outcome
- mortality of Tuta absolutae1
- Direction
- higheste0
- Value
- 98%e0
- Qualifier
- 181 droplets cm-2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest mortality values (98% and 95.9%) were associated; respectively, with the sprayings that provided the highest droplet densities: hydraulic spraying with average droplets (181 droplets cm-2) and pneumatic spraying with very fine droplets (256 droplets cm-2)”
e1“mortality of Tuta absoluta and the deposited volume dispersion on tomato leaflets”
Claim · model-written summary
Pneumatic spraying with very fine droplets gave 95.9% Tuta absoluta mortality.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- pneumatic spraying with very fine dropletse0
- Interactor
- Tuta absolutaTuta absolutae1pest
- Outcome
- mortality of Tuta absolutae1
- Direction
- higheste0
- Value
- 95.9%e0
- Qualifier
- 256 droplets cm-2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest mortality values (98% and 95.9%) were associated; respectively, with the sprayings that provided the highest droplet densities: hydraulic spraying with average droplets (181 droplets cm-2) and pneumatic spraying with very fine droplets (256 droplets cm-2)”
e1“mortality of Tuta absoluta and the deposited volume dispersion on tomato leaflets”
Claim · model-written summary
Pneumatic spraying used 80 L ha-1, 84% less application volume than the manufacturer minimum.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- pneumatic spraying with very fine dropletse1
- Outcome
- application volumee0
- Direction
- lowere0
- Value
- 80 L ha-1e0
- Qualifier
- 84%e0
- Comparator
- lowest volume recommended by the manufacturere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the latter using an application volume 84% lower (80 L ha-1) than the lowest volume recommended by the manufacturer (500 L ha-1)”
e1“pneumatic spraying with very fine droplets”
e2“tomato leaflets”
The same questions in other papers
abamectin · Tuta absoluta · Solanum lycopersicum (tomato)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →application · Tuta absoluta · Solanum lycopersicum (tomato)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
7 papers more in this group
See all 11 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.