| plant nutrient partitioning in coffee infected with meloidogyne konaensis. | two experiments were conducted to assess nutrient partitioning in coffee (coffea arabica cv. typica land race guatemala) infected with meloidogyne konaensis. nutrient levels were quantified from soil, roots, and leaves. in the first experiment, 500-cm3 aliquants of a kealakekua andisol were infested with four initial population densities of m. konaensis ranging from 0 to 1,500 freshly hatched second-stage juveniles. coffee plants (~3 months old) were transplanted into the soil and grown for 25 w ... | 2004 | 19262790 |
| esterase polymorphism in meloidogyne konaensis. | the continual detection of a slow (i1) esterase band in greenhouse cultures of meloidogyne konaensis isolated from the field led to a hypothesis that the nematode may be polymorphic for esterase. a survey of coffee fields demonstrated at least four esterase phenotypes were present in meloidogyne recovered. an f1 phenotype predominated (60% of the females), but an i1 phenotype was also common (30% of samples). a series of greenhouse and laboratory experiments were undertaken to understand this po ... | 2005 | 19262888 |
| embryogenesis and postinfection development of meloidogyne konaensis. | the effects of temperature on embryogenesis and postinfection development in meloidogyne konaensis were examined. embryogenesis was evaluated at 5, 8, 10, 13, 16, 20, 22, 24, 26, 28, 30, 35, and 40 c. no embryonic development occurred at 5 c. some development, although incomplete, occurred at 8 and 10 c. the rate of embryogenesis was linear from 13 to 30 c, but decreased at 35 c. the lowest egg mortality occurred at 24 c, whereas all eggs died within 24 hours at 40 c. postinfection development w ... | 1995 | 19277267 |
| spatial-temporal patterns of meloidogyne konaensis on coffee in hawaii. | population densities ofmeloidogyne konaensis were determined in march and july of 1991 and 1992 on coffee cultivars guatemalan and 502, and on four rootstocks (purpuree, congensis, deweveri, and kaffe) with guatemalan or 502 as a scion. three-dimensional spatial patterns were characterized on roots of guatemalan and deweveri. population densities differed among rootstocks (p < 0.05) and times (p < 0.01). the greatest number of second-stage juveniles (j2) occurred on guatemalan and fewest j2 on p ... | 1995 | 19277268 |
| description of the kona coffee root-knot nematode, meloidogyne konaensis n. sp. | meloidogyne konaensis n. sp. is described from coffee from kona on the island of hawaii. the perineal pattern of the female is variable in morphology, the medial lips of the female are divided into distinct lip pairs, and the excretory pore is 2-3 stylet lengths from the base of the stylet. mean stylet length is 16.0 mum, and the knobs gradually merge with the shaft. the knobs are indented anteriorly and rounded posteriorly and the dorsal esophageal gland orifice (dego) is long, 3.5-7 mum. the m ... | 1994 | 19279905 |
| host status of 32 plant species to meloidogyne konaensis. | a host suitability study of 32 plant species to meloidogyne konaensis included 54 vegetable cultivars, 12 field crop cultivars, one gardenia sp., and two weed species. host suitability was classified according to a m. konaensis reproductive factor: final population density (pf) (eggs + j2) / initial population density (pi) (eggs). the number of eggs per gram dry root, and a galling index was also included. reproductive factor ranges and percentages of plants in the ranges were as follows: pf/pi ... | 1994 | 19279957 |