Insecticidal Control of Banded Sunflower Moth, Cochylis hospes (Lepidoptera: Cochylidae), Larvae at Different Sunflower Growth Stages and Dates of Planting in North Dakota1

Charlet, Laurence D.; Busacca, John D.

doi:10.1093/jee/79.3.648

Cited by 22 publications

(31 citation statements)

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“…It is possible that while damage from seed-feeding caterpillars is reduced in some instances, the long duration of adult emergence for a single generation (for banded sunflower moth; Figure 1) or the occurrence of multiple generations (for sunflower moth; Kikukawa and Chippendale, 1984) may make benefits from late development inconsistent. Similar to the results in 2012-2013, Charlet and Busacca (1986) saw no effect of a three-week delay in planting time for damage by banded sunflower moth. On the other hand, damage from seed weevils in 2012-2013 was increased in late-maturing sunflowers in three of four location and year combinations tested.…”

Section: Discussionsupporting

confidence: 83%

Effects from Early Planting of Late-Maturing Sunflowers on Damage from Primary Insect Pests in the United States

Prasifka

Marek

Lee

et al. 2016

Helia

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Delayed planting is recommended to reduce damage from sunflower insect pests in the United States, including the sunflower moth, Homoeosoma electellum (Hulst) and banded sunflower moth, Cochylis hospes Walsingham. However, in some locations, planting earlier or growing later-maturing hybrids could improve yield or oil content of sunflowers which would partially offset any added costs from insect pests or their management. Because the abundance and distribution of some sunflower insects have changed since recommendations for delayed planting were developed, experimental plots were grown in 2012 and 2013 at sites in North Dakota, Nebraska, Iowa, and Illinois. Sunflowers were planted two to four weeks earlier than normal, including hybrids that flower two to three weeks later than elite commercial hybrids. The sum of seed damaged by sunflower moth, banded sunflower moth, and red sunflower seed weevil, Smicronyx fulvus LeConte, (i. e., total percentage) was influenced by location, but not the relative maturity of tested entries. However, when damage attributed solely to the red sunflower seed weevil was analyzed, more damaged seed were found for late-maturing entries in North Dakota and Nebraska. In addition to the trial data, current pest populations are lower than when delayed planting was first recommended and insecticide use during sunflower bloom is both common and effective. Together, these observations suggest factoring insect pests into planting time decisions may be unnecessary, except for areas with a history of problems with severe pests that cannot be managed using insecticides (e. g., sunflower midge, Contarinia schulzi Gagné).

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Section: Discussionsupporting

confidence: 83%

Effects from Early Planting of Late-Maturing Sunflowers on Damage from Primary Insect Pests in the United States

Prasifka

Marek

Lee

et al. 2016

Helia

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“…A média de precipitação total na primeira época de semeadura foi de 420,5 mm, e de 397,4 mm na segunda, durante todo o ciclo da cultura. Isso mostra que a chuva, além de propiciar água líquida sobre as folhas para complementação dos processos de germinação e penetração do patógeno através dos estômatos, também favoreceu a dispersão do fungo por meio de respingos (Eversmeyer & Burleigh, 1970;Frezzi et al, 1979).…”

Section: Resultsunclassified

“…A época de semeadura influencia, ainda, no controle das pragas e doenças que atacam a cultura (Charlet & Busacca, 1986), afeta o rendimento, a porcentagem de óleo, e a altura e o diâmetro do capí-tulo do girassol (Alessi et al,1977;Seiler, 1983;Kinman & Sarle, 1984).…”

Section: Introductionunclassified

Severidade da mancha-de-alternária em cultivares de girassol na região do Cerrado do Distrito Federal

Amábile

Vasconcelos

Gomes

2002

Pesq. agropec. bras.

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Resumo Avaliou-se a severidade da mancha-de-alternária (Alternaria helianthi) em cinco genótipos de girassol (Helianthus annuus L.), em duas densidades populacionais e duas épocas de semeadura. Os experimentos foram conduzidos no campo experimental da Embrapa-Centro de Pesquisa Agropecuária dos Cerrados, em Planaltina, DF, no ano agrícola de 1998/1999, num Latossolo areno-argiloso. O delineamento experimental utilizado foi o de blocos ao acaso, num esquema fatorial de 5 x 2, com três repetições. A porcentagem de plantas com sintomas da mancha foi estimada por meio de observações semanais, empregando-se notas de 0 a 5 nos terços inferior, médio e superior da planta. A população de plantas não influenciou na incidência de alternária. Todas as cultivares estudadas foram suscetíveis à doença. As condições climáticas transcorridas em cada época de semeadura modificaram a severidade da doença.Termos para indexação: Helianthus annuus, Alternaria helianthi, época de semeadura, população de plantas. Severity of alternaria in sunflower crop in the Cerrado region of Federal District, BrazilAbstract Severity of alternaria leaf spot was evaluated in five genotypes of sunflower as a result of two densities of population and two sowing dates. The experiments were conducted in the EmbrapaCentro de Pesquisa Agropecuária dos Cerrados experimental field, at Planaltina, DF, Brazil, on the crop season of 1998/1999 on an Oxisol soil. The experimental design was in randomized blocks in a 5 x 2 factorial with three replicates. The percentage of infected plants was estimated based on weekly observations considering scores from 0 to 5 in lower, middle and upper parts of the plant. The occurrence of alternaria was not influenced by density of population of 42,000 or 49,000 plants/ha. All cultivars were susceptible to the disease. The climatic conditions for each sowing date changed the disease severity.Index terms: Helianthus annuus, Alternaria helianthi, sowing date, plant population.(1) Aceito para publicação em 23 de maio de 2001.

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“…Another advantage of sampling eggs is that there is a period of Ϸ10 d between sampling and early anthesis (stage R5) when control measures (normally an insecticide application) would need to be taken (Charlet and Busacca 1986).…”

Section: Discussionmentioning

confidence: 99%

“…Larvae of the banded sunßower moth, Cochylis hospes Walsingham (Lepidoptera: Tortricidae), feed on developing sunßower seeds, and they are a serious pest of cultivated sunßower (Helianthus annuus L.) in the northern Great Plains (Charlet and Busacca 1986). Moths emerge from the soil in early July and emergence continues into August (Charlet and Gross 1990).…”

mentioning

confidence: 99%

Using Banded Sunflower Moth (Lepidoptera: Tortricidae) Egg Density to Estimate Damage and Economic Distance in Oilseed Sunflower

Mundal¹,

Brewer²

2008

Journal of Economic Entomology

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Insecticidal Control of Banded Sunflower Moth, Cochylis hospes (Lepidoptera: Cochylidae), Larvae at Different Sunflower Growth Stages and Dates of Planting in North Dakota1

Cited by 22 publications

References 0 publications

Effects from Early Planting of Late-Maturing Sunflowers on Damage from Primary Insect Pests in the United States

Effects from Early Planting of Late-Maturing Sunflowers on Damage from Primary Insect Pests in the United States

Severidade da mancha-de-alternária em cultivares de girassol na região do Cerrado do Distrito Federal

Using Banded Sunflower Moth (Lepidoptera: Tortricidae) Egg Density to Estimate Damage and Economic Distance in Oilseed Sunflower

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