Pear Pest Management Guidelines
UC agricultural management guidelines for control of pear pests. Pear Weed Photo Gallery, with Common and Scientific Names (2/07) Year-Round IPM Program for Pear (3/08) Dormant/Delayed-dormant Sampling (3/08) Pheromone Traps (3/08) Sampling at ... [... more]
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Pathogen: Venturia pirina
Scab first appears as velvety, dark olive-to-black spots on fruit, leaves, and stems. When infections occur early, fruit spots become scablike with age and the fruit may become misshapen. On leaves, infections cause leaf puckering and twisting ... [... more]
University of California IPM |
MAY to JUNE
Female San Jose scales lay eggs that hatch immediately and the young emerge from under the edge of the scale covering. These tiny yellow crawlers wander in a random fashion until they find a suitable place to settle. Immediately upon settling, ... [... more]
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PERENNIAL SEEDINGS
DIC = dichlobenil (Casaron, Norasac) GLY = glyphosate (Roundup WeatherMax, etc.) PRO = pronamide (Kerb) 1 At rates used for annual weeds, control of perennials is less than expected with high label rates. G. T. McGourty, UC Cooperative Extension, ... [... more]
University of California IPM |
General Properties of Fungicides Used in Pears
Information about General Properties of Fungicides Used in Pears. Bacillus subtillis (Serenade Max) Acknowledgment: Adaskaveg et al., 2007. Efficacy and Timing of Fungicides, Bactericides, and Biologicals for Deciduous Tree Fruit, Nut Crops, and ... [... more]
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Scientific names: Speckled green fruitworm: Orthosia hibisci
Immature larvae of both species are light green. Mature green fruitworms have green bodies and green heads. Speckled green fruitworms have cream-colored lines down the back and sides of the body. Humped green fruitworms are distinguished by a ... [... more]
University of California IPM |
Pear Psylla
Pear psylla is one of the most serious insect pest of pears because of its ability to develop resistance to insecticides and vector the pathogen that causes pear decline. Overwintering pear psylla adults are somewhat darker and larger (0.125 inch ... [... more]
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Relative Toxicities of Insecticides and Miticides Used ...
Selectivity 2 (affected groups) Acute toxicity low, but reproductive capacity impacted. (trade name and formulation) Duration of impact to natural enemies 6 azinphosmethyl (Guthion WP) bifenthrin (Brigade) chlorpyrifos (Lorsban EC) Cydia ... [... more]
University of California IPM |
Western tarnish plant bug: Lygus hesperus
Lygus bug damage may occur in all major pear districts but is mostly a pest in Delta area pear orchards. Lygus attack is more frequent in orchards having permanent cover crops and in orchards adjacent to crops or vegetation that host lygus. Lygus ... [... more]
University of California IPM |
Scientific name: Argyrotaenia franciscana (= A. citrana)
Orange tortrix, also called apple skinworm, is an occasional pest of pears in California. Moths are 0.5 inch long with tan to rusty brown forewings. Fully grown larvae are about 0.5 inch long, straw-colored to green, with light brown heads. They ... [... more]
University of California IPM |
Pear Decline
The phytoplasma organism that causes pear decline is carried by pear psylla. Psylla transmit the disease when they feed on pear foliage. The expression of the disease depends on rootstock susceptibility, tree vigor, and psylla numbers. The ... [... more]
University of California IPM |
Fruit development.
Obliquebanded leafroller overwinters as immature larvae under bud scales. Larvae are yellowish green with brown to black heads. As they mature, larvae construct tubular shelters from a single leaf. Moths of obliquebanded leafrollers have ... [... more]
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