two-spotted spider mite (tssm) is becoming resistant to many of the pesticides used in the tomatofields. a potential alternative method of control is host plant resistance, which may be mediated byglandular trichomes. in this experiment, level of entrapment and mortality of the pest by type ivglandular trichomes were studied on accessions of lycopersicon hirsutum humb & bonpl, l. pennellii(cor....

A new species of dioecious Solanum from the Australian "Dioicum Complex" of Solanum subgenus Leptostemonum is described. Solanum cowiei Martine sp. nov., is allied with other members of this problematic lineage, but differs in its slender leaves, limited armature and diminutive habit. The species was first segregated by botanists at the Northern Territory Herbarium as Solanum sp. Litchfield (I....

The evaluation of quality in agricultural products affords many research problems. Primarily, there is the difficulty of defining quality factors and the worker does well to confine his efforts to those correlated with very concrete morphological or chemical differences which are easily measureable. The variations in quality which are noted by consumers may be caused by conditions existing duri...

Tomato (Lycopersicon esculentum Mill.) plants heterozygous for the diageotropica (dgt) mutation exhibit a unique phenotype, termed ;mottled.' Unlike dgt, mottled individuals grow upright, exhibit normal root branching, and produce normal levels of ethylene in response to applied auxin. Leaves of mottled plants are deformed and reduced in size and are characterized by a mottled appearance on the...

Taiwanese isolates of Phytophthora infestans were examined for mating types and pathogenicity to tomato and potato. A total of 70 isolates, including 68 isolates from tomato and 2 isolates from potato, from six counties of Taiwan were all A1 mating type. Three tomato isolates of P. infestans caused only leaf blight of tomato, while two isolates obtained from potato were able to cause the diseas...

Recent studies concerning the isolation and purification of exopolysaccharides from suspension-cultured tomato (Lycopersicon esculentum L. var. San Marzano) cells and the description of a simple, rapid and low environmental impact method with for obtaining polysaccharides from solid tomato-processing industry wastes are reported. Their chemical composition, rheological properties and partial pr...

The genetic nature of resistance and its epidemiologic effects on two Meloidogyne incognita populations were assessed in the F hybrid tomato cv. Small Fry. The progeny of a Small Fry x Small Fry cross segregated in a 3:1 resistant:susceptible ratio, indicating the presence of a single, completely dominant resistance gene (LMiR) in Small Fry. In a subsequent experiment, infection frequency and t...