Abstract
Recent registration of sterol biosynthesis inhibitor and strobilurin fungicides for control of early (Cercospora arachidicola) and late (Cercosporidium personatum) leaf spot diseases of peanut (Arachis hypogaea) has renewed interest in the potential for loss of disease control due to fungicide resistance. The objectives of this study were to use the systemic fungicide benomyl, the protectant fungicide chlorothalonil, and late leaf spot of peanut as a model system to compare fungicide application strategies for fungicide resistance management. Field experiments were conducted at Tifton and Plains, GA, in 1995 and 1996 to determine the effects of alternate applications, mixtures, and alternating block applications of chlorothalonil and benomyl compared with full-season applications of two rates of chlorothalonil and two rates of benomyl alone on late leaf spot of peanut and on the proportion of the pathogen population resistant to benomyl following the various regimes. Tank mix combinations of half rates of the two fungicides and alternations of the full rates of the two fungicides provided better (P ≤ 0.05) control of late leaf spot than full-season applications of either rate of benomyl alone, and were comparable to full rates of chlorothalonil alone. Neither tank mixes nor alternating sprays prevented an increase in the relative frequency of benomyl-resistant isolates compared with other treatments in which benomyl was used. Both mixtures and alternate applications of chlorothalonil and benomyl were effective for management of leaf spot in fields where benomyl alone did not provide season-long leaf spot control.
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Claims 3
Claim · model-written summary
Half-rate tank mixtures controlled peanut late leaf spot better than full-season benomyl alone.
- Taxon
- peanut
Arachis hypogaeat0 - Treatment
- Tank mix combinations of half rates of the two fungicidese0
- Interactor
- Cercosporidium personatumNothopassalora personatae1pathogene0
- Outcome
- control of late leaf spote0
- Direction
- bettere0
- Comparator
- full-season applications of either rate of benomyl alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tank mix combinations of half rates of the two fungicides and alternations of the full rates of the two fungicides provided better (P ≤ 0.05) control of late leaf spot than full-season applications of either rate of benomyl alone, and were comparable to full rates of chlorothalonil alone.”
t0“Management of Late Leaf Spot of Peanut”
e1“late (Cercosporidium personatum) leaf spot diseases of peanut (Arachis hypogaea)”
Claim · model-written summary
Alternating full rates controlled peanut late leaf spot better than full-season benomyl alone.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- alternations of the full rates of the two fungicidese0
- Interactor
- Cercosporidium personatumNothopassalora personatae1pathogene0
- Outcome
- control of late leaf spote0
- Direction
- bettere0
- Comparator
- full-season applications of either rate of benomyl alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tank mix combinations of half rates of the two fungicides and alternations of the full rates of the two fungicides provided better (P ≤ 0.05) control of late leaf spot than full-season applications of either rate of benomyl alone, and were comparable to full rates of chlorothalonil alone.”
t0“Management of Late Leaf Spot of Peanut”
e1“late (Cercosporidium personatum) leaf spot diseases of peanut (Arachis hypogaea)”
Claim · model-written summary
Mixtures and alternating sprays did not prevent increased benomyl resistance frequency.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- tank mixes nor alternating sprayse0
- Interactor
- Cercosporidium personatumNothopassalora personatae1pathogene0
- Outcome
- relative frequency of benomyl-resistant isolatese0
- Direction
- increasee0
- Comparator
- other treatments in which benomyl was usede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither tank mixes nor alternating sprays prevented an increase in the relative frequency of benomyl-resistant isolates compared with other treatments in which benomyl was used.”
t0“Management of Late Leaf Spot of Peanut”
e1“late (Cercosporidium personatum) leaf spot diseases of peanut (Arachis hypogaea)”
The same questions in other papers
application · Nothopassalora personata · Arachis hypogaea (peanut)Positive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →fungicide · Nothopassalora personata · Arachis hypogaea (peanut)Results agree
7 papers in the same direction as this paper
- 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.