Abstract
The present work evaluated reducing on spray volume for the control of Leucoptera coffeella (Guérin-Mèneville & Perrottet, 1842; Lepidoptera: Lyonetiidae) in coffee. Were used a conventional sprayer to apply the volumes 400 and 200 L ha-1 and an ultra-low-volume (ULV) sprayer to apply 46, 67 and 92 L ha-1. Sprays utilized 800 mL.ha-1 of the insecticide profenofos+lufenuron. The tracer MnSO4 was mixed to the spraying liquids at 20 g L-1. Leaves were collected from different parts of the coffee tree to evaluate the volume of insecticide spraying liquid deposited. For the L. coffeella control, leaves were collected before and 7, 14, and 21 days after spraying (DAS) to evaluate the number of live and dead L. coffeella larvae. The variables data were subjected to variance analysis and the means compared by Tukey’s test (p<0.05). There was no significant difference for spraying liquid deposit between the volumes of 200 and 400 L ha-1, as well as among the ULVs at 46, 67 and 92 L ha-1, however with lower deposit for the latter. The estimated insecticide volume deposited was significantly higher for the 200 L ha-1. The untreated control had higher number of live L. coffeella larvae compared to the sprays at 7 and 21 DAS, as exception for the 14 DAS. The volume of 200 L ha-1 by the conventional sprayer and 92 L.ha-1 by the ULV sprayer may be adopted for coffee plantations providing insecticide deposit and control of L. coffeella with efficiency above 80%.
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Claims 6
Claim · model-written summary
Conventional 200 and 400 L ha-1 sprays did not differ significantly in liquid deposit.
CoffeaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“There was no significant difference for spraying liquid deposit between the volumes of 200 and 400 L ha-1”
t0“Reducing spray volume for the control of Leucoptera coffeella (Lepidoptera: Lyonetiidae) in coffee plants”
Claim · model-written summary
ULV volumes of 46, 67 and 92 L ha-1 did not differ significantly in deposit.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“There was no significant difference for spraying liquid deposit between the volumes of 200 and 400 L ha-1, as well as among the ULVs at 46, 67 and 92 L ha-1, however with lower deposit for the latter.”
t0“Reducing spray volume for the control of Leucoptera coffeella (Lepidoptera: Lyonetiidae) in coffee plants”
Claim · model-written summary
ULV sprays had lower liquid deposit.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“There was no significant difference for spraying liquid deposit between the volumes of 200 and 400 L ha-1, as well as among the ULVs at 46, 67 and 92 L ha-1, however with lower deposit for the latter.”
t0“Reducing spray volume for the control of Leucoptera coffeella (Lepidoptera: Lyonetiidae) in coffee plants”
Claim · model-written summary
The estimated insecticide volume deposited was significantly higher with 200 L ha-1.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The estimated insecticide volume deposited was significantly higher for the 200 L ha-1.”
t0“Reducing spray volume for the control of Leucoptera coffeella (Lepidoptera: Lyonetiidae) in coffee plants”
Claim · model-written summary
Untreated controls had more live leafminer larvae than sprayed coffee at 7 and 21 days after spraying.
- Interactor
- L. coffeella
Leucoptera coffeellae1t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The untreated control had higher number of live L. coffeella larvae compared to the sprays at 7 and 21 DAS, as exception for the 14 DAS.”
t0“Reducing spray volume for the control of Leucoptera coffeella (Lepidoptera: Lyonetiidae) in coffee plants”
Claim · model-written summary
The 200 L ha-1 conventional and 92 L.ha-1 ULV volumes gave leafminer control efficiency above 80%.
- Interactor
- L. coffeellaLeucoptera coffeellae1t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The volume of 200 L ha-1 by the conventional sprayer and 92 L.ha-1 by the ULV sprayer may be adopted for coffee plantations providing insecticide deposit and control of L. coffeella with efficiency above 80%.”
t0“Reducing spray volume for the control of Leucoptera coffeella (Lepidoptera: Lyonetiidae) in coffee plants”
The same questions in other papers
application · Leucoptera coffeella · Coffea (coffee)Results agree
1 paper in the same direction as this paper
- positive
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.