Pear Psylla Control with Dormant Sprays1

Hamilton, D. W.

doi:10.1093/jee/41.3.443

Cited by 4 publications

(3 citation statements)

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“…Non traditional insecticidal compounds are important for management of a variety of homopteran pests, including aphids (Xie and Isman 1995;Reuter et al 1993), whiteflies (Lied1 et al 1995Liu and Stansly 1995;Larew 1988), and scales (Riehl and Carman 1953) as well as other arthropod pests (reviewed by Willet and Westigard 1988). Prebloom application of petroleum oils has been used for management of pear psylla adults (Hamilton 1948). Zwick and Westigard (1978) demonstrated that application of oils during the dormant period delays oviposition in winterform females until the appearance of foliage.…”

Section: Introductionmentioning

confidence: 99%

Reduction in Pear Psylla (Homoptera: Psyllidae) Oviposition and Feeding by Foliar Application of Various Materials

et al. 1997

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Several horticultural oils, an insecticidal soap, neem, garlic extract, a sugar ester, and a synthetic insect growth regulator were evaluated under laboratory conditions for their ability to inhibit pear psylla’s [Cacopsylla pyricola (Foerster)] feeding and oviposition. Supreme oil significantly reduced winterform oviposition rates in both choice and no-choice assays and reduced feeding rates in no-choice assays. Supreme oil also reduced oviposition rates of summerform females in choice tests but not in no-choice tests. In addition, summerform oviposition rates were reduced significantly by application of several mineral oils (Orchex 796E, 692, and WS2928) and garlic barrier to pear foliage in no-choice tests, and by all oils, garlic barrier, and M-Pede in choice tests. Summerform feeding rates were reduced by application of mineral oils. Data suggest that "summer type" oils and other compounds may have utility in pear psylla management programs by decreasing feeding and oviposition.

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Section: Introductionmentioning

confidence: 99%

Reduction in Pear Psylla (Homoptera: Psyllidae) Oviposition and Feeding by Foliar Application of Various Materials

et al. 1997

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“…Previous investigations in the eastern U.S. pear growing areas have indicated that lower summer populations followed when overwintering adults were controlled prior to oviposition on dormant pear trees (Hodgkiss 1914;Hamilton 1948). Ross (1932) recommended a 3% dormant oil emulsion to reduce overwintering adult psylla densities, but found the greatest benefit was to delay egg laying.…”

mentioning

confidence: 99%

Prebloom Petroleum Oil Applications for Delaying Pear Psylla (Homoptera: Psyllidae) Oviposition

Zwick

Westigard

1978

Can Entomol

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Application of petroleum oils prior to oviposition by overwintering pear psylla, Psylla pyricola Foerster, reduced oviposition by 98% for up to 5 weeks. The delay of oviposition and reduction in subsequent egg and nymph densities were inversely proportional to the rate of oil used. The reduced oviposition rate was due primarily to inhibition of oviposition by oil deposits on the host, not adult mortality. No commercially important deleterious effects of oil treatments were detected on several pear varieties.

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“…Oil combined with an insecticide was used against newly hatched nymphs beginning in the early 1900s with mixtures of oil and lime sulphur (Hartzell 1925, Strickland 1925). At mid-century, insecticides such as dinitro-orthocresol (Hamilton 1948, Madsen and Marshall 1961) or the organophosphates were used in oil during the prebloom period, but were abandoned with arrival of pyrethroids in the 1980s (Buès et al 2003). As it became apparent that prebloom insecticides interfered with season-long control of psyllids due to disruption of biological control (e.g., Westigard 1973a, Burts 1981), classes of products having lesser effects on natural enemies began to appear (Fig.…”

Section: Pest Managementmentioning

confidence: 99%

Diversity, biology, and management of the pear psyllids: a global look

Civolani,

Soroker,

Cooper

et al. 2023

Annals of the Entomological Society of America

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The pear psyllids (Cacopsylla Ossiannilsson; Hemiptera: Psylloidea: Psyllidae) are a taxonomically difficult group of at least 24 species native to the Palaearctic region. One or more species occur in most pear-growing regions, in some cases as invasive introductions. Existing reviews of this group are primarily of taxonomic focus with limited overviews of biology. The earliest biological studies of the pear psyllids centered on a core group of a few western European species. In part, this focus arose because diversity of the pear psyllids was poorly understood. As taxonomic understanding has advanced over the last 3 decades, research has expanded taxonomically. Increasing difficulties in controlling the pear psyllids additionally has contributed to growth in research. Here, we review a now-extensive literature on diversity, biology, and management of the pear psyllids. Three broad observations emerged from this synthesis. First, large gaps in biological understanding of the pear psyllids persist for several geographic faunas, most notably for psyllids of the Eastern Palaearctic region. Second, taxonomic diversity is accompanied by biological diversity. Despite the commonality in host use among the pear psyllids, with each species being limited to development on Pyrus, striking differences exist among species in life cycles, wintering, and other biological traits. Third, many of the tools being used to manage pear psyllids today are in existence because of the long history of basic research which has targeted these pests. These tools include new insecticides of higher selectivity, various cultural and horticultural tactics, and practices that conserve natural enemies in orchards.

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Pear Psylla Control with Dormant Sprays1

Cited by 4 publications

References 0 publications

Reduction in Pear Psylla (Homoptera: Psyllidae) Oviposition and Feeding by Foliar Application of Various Materials

Reduction in Pear Psylla (Homoptera: Psyllidae) Oviposition and Feeding by Foliar Application of Various Materials

Prebloom Petroleum Oil Applications for Delaying Pear Psylla (Homoptera: Psyllidae) Oviposition

Diversity, biology, and management of the pear psyllids: a global look

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