Abstract
Testing new chemistries and monitoring the efficacy of existing compounds is extremely important because the CPB has the ability to develop resistance to chemical insecticides. The experiment was conducted at Presque Isle, ME, in 2014 and replicated four times. Experimental design was a randomized complete block, with plots being four rows wide (12 ft) and 50-ft long. A 10-ft space was left fallow between blocks, and a 6-ft space was left fallow between plots within blocks. The crop was planted on 28 May using machine-cut “Kennebec” potato seed. A two-row potato planter (John Deere 216) applying 1,100 lb of 14-14-14 fertilizer per acre was used to form open furrows. The seed was hand placed at 12-inch spacing. The rows were mechanically covered, placing the seed piece approximately 3 inches below the surface. Foliar insecticide applications were made with a modified Century boom sprayer affixed with eight Turbo Twinjet nozzles delivering 40-gpa at 35-psi pressure with a 12 ft wide spray pattern, boom height of 20–24 inches and tractor speed 3 mph. The crop was treated with Bravo ZN at 5–7-d intervals throughout the season for late blight control based on recommendations from the University of Maine Cooperative Extension. Numbers of insects were counted weekly on 20 plants selected randomly from the center two rows of each plot. When dates of count and application were the same, counts were made prior to applications of the insecticide. Analyses of variance were conducted following transformation of the data using log 10 ( X + 1), and means were compared using Fisher’s LSD test. Means followed by the same letter do not significantly differ from each other ( P > 0.05). The soil was classified as Caribou Loam, pH 5.0. The total monthly rainfall for June, July, and August was, respectively, 3.55, 5.31, and 1.28 inches and the mean temperature was 63.25, 69.47, and 65.53°F. Colorado potato beetle populations were low prior to the first application, possibly due to low winter temperatures. There was no difference between insect responses to chemical treatments following the first application ( Table 1 ). After the second application, Blackhawk showed the best control, followed by DPX-KN128 applied at the high rate. Avaunt applied at the high rate displayed the same level of control as Admire Pro. AzaGuard and the low rates of DPX-KN128 and Avaunt did not affect CPB populations compared with the untreated check ( Table 1 ). However, all chemicals did reduce the amount of damage done to the foliage ( Table 2 ). There were no significant effects on yields, but the untreated check had the lowest numeric value for the weight of harvested tubers ( Table 2 ). Means in a column followed by the same letter are not significantly different (LSD, P > 0.05). Means in a column followed by the same letter are not significantly different (LSD, P > 0.05). No phytotoxicity symptoms were observed following any of the insecticide treatment applications.
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Claims 11
Claim · model-written summary
First application showed no difference in insect responses among chemical treatments.
- Taxon
- Potato
Solanum tuberosumt0 - Treatment
- chemical treatmentse0
- Interactor
- Colorado potato beetle
Leptinotarsa decemlineatae1pest - Outcome
- insect responsese0
- Direction
- no differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no difference between insect responses to chemical treatments following the first application”
t0“Potato”
e1“Colorado potato beetle”
Claim · model-written summary
Blackhawk gave the best control after the second application.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Blackhawke0
- Interactor
- Colorado potato beetleLeptinotarsa decemlineatae1pest
- Outcome
- best controle0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the second application, Blackhawk showed the best control”
t0“Potato”
e1“Colorado potato beetle”
Claim · model-written summary
High-rate DPX-KN128 followed Blackhawk in control.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- DPX-KN128 applied at the high ratee0
- Outcome
- controle2
- Comparator
- Blackhawke1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by DPX-KN128 applied at the high rate”
t0“Potato”
e1“Blackhawk”
e2“After the second application, Blackhawk showed the best control”
Claim · model-written summary
High-rate Avaunt gave the same control as Admire Pro.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Avaunt applied at the high ratee0
- Outcome
- level of controle0
- Direction
- samee0
- Comparator
- Admire Proe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Avaunt applied at the high rate displayed the same level of control as Admire Pro”
t0“Potato”
Claim · model-written summary
AzaGuard did not affect CPB populations versus untreated check.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- AzaGuarde0
- Outcome
- CPB populationse0
- Direction
- did not affecte0
- Comparator
- untreated checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AzaGuard and the low rates of DPX-KN128 and Avaunt did not affect CPB populations compared with the untreated check”
t0“Potato”
Claim · model-written summary
Low-rate DPX-KN128 did not affect CPB populations.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- DPX-KN128e0
- Outcome
- CPB populationse0
- Direction
- did not affecte0
- Comparator
- untreated checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the low rates of DPX-KN128 and Avaunt did not affect CPB populations compared with the untreated check”
t0“Potato”
Claim · model-written summary
Low-rate Avaunt did not affect CPB populations.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Avaunte0
- Outcome
- CPB populationse0
- Direction
- did not affecte0
- Comparator
- untreated checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the low rates of DPX-KN128 and Avaunt did not affect CPB populations compared with the untreated check”
t0“Potato”
Claim · model-written summary
All chemicals reduced foliage damage.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- all chemicalse0
- Outcome
- damage done to the foliagee0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all chemicals did reduce the amount of damage done to the foliage”
t0“Potato”
Claim · model-written summary
Insecticide treatments had no significant effect on yield.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- insecticide treatment applicationse1
- Outcome
- yieldse0
- Direction
- no significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no significant effects on yields”
t0“Potato”
e1“insecticide treatment applications”
Claim · model-written summary
Untreated check had lowest numeric harvested tuber weight.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- untreated checke0
- Outcome
- weight of harvested tuberse0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the untreated check had the lowest numeric value for the weight of harvested tubers”
t0“Potato”
Claim · model-written summary
No phytotoxicity symptoms followed insecticides.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- insecticide treatment applicationse0
- Outcome
- No phytotoxicity symptomse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No phytotoxicity symptoms were observed following any of the insecticide treatment applications”
t0“Potato”
The same questions in other papers
insecticide · yield · Solanum tuberosum (potato)Results differ
9 papers in the same direction as this paper · 22 in the opposite direction
- positive
- positive
- positive
28 papers more in this group
See all 32 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.