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H L Foster

Publications and source records attributed to H L Foster.

8 recordsLinked to original sources
PubMed2005

Investigations on the causes of upper stem rot (USR) on standing mature oil palms.

Three different trials to examine the cause of upper stem rot (USR) infection in oil palm failed to achieve any infection. In the first experiment, inoculum was applied as colonised rubber wood blocks or as spore suspensions. In the second experiment, particular attention was given to ensure that the Ganoderma spores were freshly collected to maintain viability but no infection was observed around the inoculation sites of any of the different oil palm tissues treated. Lastly in the third experiment, both monokaryotic and dikaryotic mycelial cultures were applied directly to cut fronds, which were protected with a moist covering, but no infection was detected after more than two years. Failure to achieve infection by direct inoculation would indicate that USR does not arise from direct infection of living tissues by Ganoderma spores or mycelium, this is probably because of insufficient inoculum potential to cause infection. It is suggested that USR infection is achieved only when a sufficiently large source of inoculum has built up in dead material, probably in frond axils, and this allows invasion of the living tissues.

Arecaceae↗
PubMed1976

Progress report on the Charles River Breeding Laboratories' free-ranging rhesus monkey breeding colony on Key Lois, Florida.

The nucleus of a breeding colony of free-ranging rhesus monkeys (Macaca mulatta) free from tuberculosis, herpes-B virus, shigellosis, and salmonellosis has been established on Key Lois, Florida, USA. Standardized procedures for trapping, quarantine, and shipping from the wild in India to the island have been established. The monkeys seem to have adapted well to the Florida Keys' climate. Reproduction has proceeded according to expectations, and social groups have been formed with continual restructuring as each new group is placed on the island. The isolation of Key Lois from other inhabited keys by the open sea affords good isolation and has discouraged intrusion by unwanted visitors. The operational costs of this island breeding program are encouraging. It is projected that by 1976 or 1977, monkeys should be available from this colony at a lower price than for animals bred in indoor facilities; and their availability will be in excess of animals trapped in the forest and subjected to a conventional conditioning and quarantine period.

Animal Feed↗
PubMed1976

Multiple testing for the detection of B virus antibody in specially handled rhesus monkeys after capture from virgin trapping grounds.

Eight groups of rhesus monkeys totaling over 1,000 animals were captured in the virgin trapping grounds of Jammu and Kashmir, India. Individual caging and special handling technics were utilized to prevent cross-contamination during capture, holding, and subsequent shipment to quarantine facilities in the United States. Immediately following the arrival of the monkeys, 5 consecutive blood samples were obtained at approximately 2-wk intervals, and the sera were rested for neutralizing antibody against Herpesvirus simiae. In order to assure the greatest sensitivity possible, sera were not heat-inactivated and were tested against only 10 TCID50 units of virus in addition to the more commonly used concentration of 100 TCID50 units. The first test detected 80-90% of the positive animals within each group, and only 1 seroconversion was noted after the second test. Seventy-three percent of the adults, 36.6% of the young adults, and 12.4% of the juvenile macaques were found to be antibody-positive. Considering the measures employed to prevent cross contamination, these percentages probably reflect the true prevalence of B virus infection in these rhesus monkeys at the time of their capture in the wild.

Animals↗