EFFECT OF INSECTICIDES ON PREDATORS OF THE PEAR PSYLLA, PSYLLA PYRICOLA (HEMIPTERA: PSYLLIDAE), IN ONTARIO

1983 ◽  
Vol 115 (10) ◽  
pp. 1409-1414 ◽  
Author(s):  
Elmer A. C. Hagley ◽  
C. M. Simpson
Keyword(s):  
Predatory Mite ◽  
Pear Psylla ◽  
Anthocoris Nemoralis ◽  
Pear Orchard

AbstractThe predominant predator of the pear psylla, Psylla pyricola Foerster, in a pear orchard on the Niagara Peninsula, Ontario was the anthocorid, Anthocoris nemoralis (F.). Applications of permethrin (62.5 g a.i./ha) reduced numbers of the predator when applied at petal fall. Azinphosmethyl (336.4 g a.i./ha) applied at petal and at 1st cover did not affect A. nemoralis. Both insecticides reduced the numbers of the predatory mite, Balaustium putmani Smiley. Species of Hemiptera other than A. nemoralis, especially Miridae and Reduviidae, were reduced by permethrin applied at petal fall and by azinphosmethyl applied at 1st cover.

THE INFLUENCE OF THREE INSECTICIDES ON PREDATION OF THE PEAR PSYLLA, PSYLLA PYRICOLA

1967 ◽  
Vol 99 (12) ◽  
pp. 1292-1297 ◽  
Author(s):  
R. D. McMullen ◽  
C. Jong
Keyword(s):  
Predation Pressure ◽  
Population Densities ◽  
Predator Species ◽  
Chrysopa Carnea ◽  
Azinphos Methyl ◽  
Pear Psylla ◽  
Pear Orchard ◽  
Insect Predators ◽  
Campylomma Verbasci ◽  
Competition For Food

AbstractThe effects of sprays of DDT, azinphos-methyl, and Ryania applied to a pear orchard on population densities of insect predators of Psylla pyricola Förster were assessed. The P. pyricola in the orchard were naturally tolerant to DDT and Ryania and highly resistant to azinphos-methyl. DDT eliminated or severely reduced numbers of Deraeocoris brevis piceatus Knight, D. fasciolus Knight, Diaphnocoris provancheri (Burque), and Campylomma verbasci (Meyer). Chrysopa carnea Stephens and C. oculata Say were moderately reduced. Anthocoris antevolens (White) and A. melanocerus Reuter were highly tolerant to DDT. Azinphos-methyl severely reduced numbers of A. antevolens, A. melanocerus, C. verbasci, and D. provancheri. C. carnea and C. oculata were moderately reduced. D. brevis piceatus and D. fasciolus were tolerant to azinphos-methyl. Ryania severely reduced numbers of A. antevolens, A. melanocerus, and C. verbasci; moderately reduced D. provancheri; and did not affect D. brevis piceatus, D. fasciolus, C. carnea, or C. oculata.In the DDT-treated plots the relative densities of Anthocoris spp. approximately doubled compared with the untreated plots. This was probably due to removal of competition for food by other predator species. Large increases ill the relative densities of Deraeocoris spp. were also observed in the Ryania treatments, probably for similar reasons. Significant increases in the P. pyricola populations in response to removal of predation pressure by the insecticide treatments occurred in the DDT and azinphos-methyl plots bur not in the Ryania plots.

scholarly journals The effects of plant cover on population of pear psylla (Cacopsylla pyricola) and its predators

2017 ◽  
Vol 109 (1) ◽  
pp. 71 ◽  
Author(s):  
Mohammad Saeed Emami
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Analysis Of Variance ◽  
Block Design ◽  
Plant Cover ◽  
Bare Ground ◽  
Pear Psylla ◽  
Leaf Sampling ◽  
Randomized Complete Block Design ◽  
Anthocoris Nemoralis

<p><em></em><em>Cacopsylla</em> <em>pyricola</em> (Förster, 1848) (Hemiptera: Psyllidae) is a serious pest of pear in all pear growing areas. In the scope of an integrated pest management, a two consecutive years study was carried out to determine the effects of plant cover on pear psyllid population and its predators. Two treatments including plant cover and bare ground were applied in a randomized complete block design with three replicates. The sampling of the pest and its predators were done weekly by beating technique and leaf sampling. The data were subjected to analysis of variance (ANOVA). The results showed that plant cover had significant effect on the increase of predators on the trees (<em>P</em> &lt; 0.001). The psyllid specialist predator, <em>Anthocoris nemoralis </em>(Fabricius, 1794), had the highest population among the pear psyllid predators (0.29 per sample). Plant cover had no significant effect on reducing the population of eggs, nymphs and adults of the pear psyllid. Despite the increase in the population of predators led by plant cover, lack of their effectiveness to reduce the pear psyllid population is discussed.</p>

Climbing Night-shade as a Host of the Pear Psylla (Homoptera: Psyllidae)

1966 ◽  
Vol 98 (5) ◽  
pp. 558-559 ◽  
Author(s):  
Walter H. A. Wilde
Keyword(s):  
Life Cycle ◽  
Cover Crop ◽  
Growing Season ◽  
Instar Nymph ◽  
Plant Host ◽  
Solanum Dulcamara ◽  
Pear Psylla ◽  
The World ◽  
Pear Orchard ◽  
Hard Shell

In Ontario, pear has been the only recorded host of the pear psylla, Psylla pyricola Foerster (Goble 1963), although in other areas of the world Quince, Downy Chess Grass, and apple twigs have also been reported (Smith 1941; Swirski 1954; and Wilde 1963).Numbers of pear psylla adults were observed on climbing night-shade, Solanum dulcamara L. (Muenscher 1955) growing as cover crop in a pear orchard near Paris, Ontario, in 1965. Regular observation of psylla occurrence on this plant host throughout the growing season indicated that P. pyricola Foer. could complete its life cycle on S. dulcamara; eggs and nymphal stages up to the hard-shell stage, as well as cast nymphal skins, were observed on this host. Egg mortality was noted on those portions of S. dulcamara that were damaged showed severe wilting characteristics. Egg and second-instar nymph on the undersurface of the leaf of S. dulcamara are illustrated in Figs. 1 and 2.

What habitat does spiny snout mite occupy in Tasmania

2015 ◽  
Vol 68 ◽  
pp. 446-446
Author(s):  
D.J. Wilson ◽  
P.J. Gerard
Keyword(s):  
New Zealand ◽  
Sand Dune ◽  
Biocontrol Agent ◽  
Predatory Mites ◽  
Mite Species ◽  
Predatory Mite ◽  
Habitat Specificity ◽  
Nontarget Organisms ◽  
Flea Control ◽  
Potential Biocontrol Agent

Spiny snout mite (Neomolgus capillatus) is a potential biocontrol agent for clover flea (Sminthurus viridis) a white clover pest on dairy farms in warmer and wetter parts of New Zealand In the 1990s this mite was introduced from Brittany France into Tasmania for clover flea control Results during the release programme were highly promising and subsequent anecdotal farmer reports indicate widespread decreases in damage As N capillatus is a predatory mite and already known to attack nontarget organisms habitat specificity will determine whether it could be introduced into New Zealand without risk to native insects To assess this pastures on nine of the original Tasmanian release farms and adjacent nontarget habitats ranging from bush wetlands eucalypt stands to sand dune country were sampled in April 2014 Litter samples were collected heat extracted and mite species identified Neomolgus capillatus was found at effective densities in pastures that had good clover cover Where present it displaced Bdellodes spp mites that are ineffective against clover flea No N capillatus were found in the nontarget habitats all of which lacked clover and contained other predatory mites including Bdellodes spp Therefore the preference by N capillatus for lush pastures makes it an excellent prospect for introduction as a biocontrol agent into clover flea prone regions of New Zealand

scholarly journals Mint companion plants attract the predatory mite Phytoseiulus persimilis

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Kazuki Togashi ◽  
Mifumi Goto ◽  
Hojun Rim ◽  
Sayaka Hattori ◽  
Rika Ozawa ◽  
...  
Keyword(s):  
Phytoseiulus Persimilis ◽  
Predatory Mite ◽  
Companion Plants
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