First Report of the Peach Root-Knot Nematode, Infecting Almond on Root-Knot Nematode Resistant 'Hansen 536' and 'Bright's Hybrid 5' Rootstocks in California, USA.

In April-August 2018, samples of galled roots with rhizosphere soil were collected from almond orchards in Atwater, Merced County and Bakersfield, Kern County, California. Almond trees () grafted on 'Hansen 536' and 'Brights Hybrid5' (peach-almond hybrid) rootstocks showed strong symptoms of growth decline. Extracted root-knot nematodes were identified by both morphological and molecular methods as .

Geocenamus angelescresti n. sp., a Diagnostic Key and Compendium to the Species of the Genus Geocenamus Thorne &Malek, 1968 (Nematoda: Belonolaimidae).

Geocenamus angelescresti n. sp. (Nematoda: Belonolaimidae) was found in rhizosphere of Pinus ponderosa and Arctostaphylos patula growing along Angeles Crest Highway in the San Gabriel mountains of California.

A Comparative Analysis of Extraction Methods for the Recovery of Anguina sp. from Grass Seed Samples.

Four procedures were compared in their efficacy to extract juveniles of Anguina agrostis from commercial grass seed. The procedures included those currently used by the state regulatory laboratories of Oregon and California, as well as new tests developed to determine juvenile viability for the phytosanitary certification of fumigated grass seed. Eleven seed lots of Agrostis tenuis (bentgrass) and Dactylis glomerata (orchardgrass) naturally infested with varying levels of juveniles of Anguina were individually analyzed.

Description of Hemicycliophora biosphaera n. sp. from Arizona (Nemata: Criconematidae).

Hemicycliophora biosphaera n. sp. (Nemata: Criconematidae) was found in soil from a fallow field plot within the Biosphere 2 Center, Oracle, Arizona.

Predaceous Behavior and Life History of Odontopharynx longicaudata (Diplogasterida).

The behavior of a California isolate of the predaceous nematode, Odontopharynx longicaudata de Man, was studied in water agar culture. When feeding on an Acrobeloides sp. the predator completed its life cycle in 13 to 14 days at 25 C.

Taxonomy and Postembryonic Stages of the Nematode Predator Odontopharynx longicaudata de Man, 1912 (Diplogasterida).

Odontopharynx longicaudata (Diplogasterida: Odontopharyngidae) was found in soil around roots of Poa annua L. growing on a golf course in San Francisco, California. This is the first record of this species in the United States.

Reactions of Grape Rootstocks to Pratylenchus vulnus and Meloidogyne spp.

Five grape rootstocks were inoculated with 0, 100, 1,000, and 10,000 Pratylenchus vulnus. Dogridge and Saltcreek supported low average total numbers of P. vulnus, 136-705/pot, at 12 months after inoculation.