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The ambrosia beetle, Euwallacea fornicatus Eichhoff, was first recorded in Israel in 2009. The symbiotic fungus Fusarium sp., carried in mycacangia located in the anterior region of the female head, is responsible for the typical wilt symptoms inflicted on avocado (Persea americana Miller) trees. The beetle–fungus complex has become a serious threat to the(More)
The pathogenicity of steinernematid and heterorhabditid nematodes to caterpillars of the giant looper,Boarmia selenaria (Schiffermüller) (Lepidoptera: Geometridae), was determined under laboratory conditions. High mortality (over 80%) was achieved, in a petri dish bioassay, with a minimum of 20,000 infective juveniles (IJ) ofSteinernema carpocapsae(More)
The encapsulation of eggs ofMetaphycus swirskii Annecke & Mynhardt (Hymenoptera: Encyrtidae) by the pyriform scale,Protopulvinaria pyriformis (Cockerell) (Homoptera: Coccidae), collected in the coastal plain of Israel, was determined during April 1986 to May 1987. The rates of encapsulation were low in November (13.0%) and relatively high in April, May,(More)
Biological control of four phloem-feeding homopterans on citrus and avocado is discussed. Examples of successful control are those achieved withParabemisia myricae andIcerya purchasi; only partial control was obtained withProtopulvinaria pyriformis (nonspecific parasitoid complex) and withPlanococcus citri (climatic conditions unfavourable for its natural(More)
Chromosome studies were made on embryonic tissues of eggs of 15 species of predaceous mites of the family Phytoseiidae belonging to six genera: Amblyseius Berlese, Seiulus Berlese, Typhlodromus Scheuten, Phytoseiulus Evans, Phytoseius Ribaga and Paragigagnathus Amitai et Grinberg. In 14 species, the chromosome numbers n=4, 2n=8 were found. In cytological(More)
A progressive development of the testes of Rhipicephalus appendiculatus, R. sp. (near appendiculatus), R evertsi evertsi and R. simus, was observed and shown to be dependent on the length of time of attachment of the ticks to their host. The progress of spermatogenesis was studied by examinations at 24 hours intervals. In R. appendiculatus, meiosis appeared(More)
The chromosomal picture was studied on early cleayage divisiona of 10 phytoseiid mites, using the aceto-orcein smear technique. Eggs of 9 species have either a haploid (4) or a diploid (8) number of chromosomes:Amblyseius rubini Swirski & Amitai,A. swirskii Athias,A. hibisci Chant,A. ohilenensis (Dosse),A. largoensis (Muma),Typhlodromus athiasae Porath and(More)
(Z,Z)-6,9-cis-(3S,4R)-Epoxynonadecadiene9a and (Z,Z,Z)-3,6,9-nonadecatriene have been identified as sex pheromone components in female ovipositor extracts and effluvia of the geometridBoarmia selenaria. The identification was based on relative retention times on gas chromatographic columns, GC-MS, chemical enantioselective syntheses, EAG, wind-tunnel(More)