Merino lambs born in September and October 1964 were weaned at 4, 6 and 11 weeks of age, at average liveweights of 9 kg, 12 kg, and 19 kg respectively, on to a pasture of phalaris and white clover. The lambs remaining with their mothers for 11 weeks showed the earliest onset of an appreciable worm infection which reached a peak in December about one month after weaning. Similar levels of infect...

An early English explorer of North America, Captain John Smith reported use of a wild food called mattoume by native inhabitants of Virginia. Botanical identification of mattoume has been a mystery. In an attempt to solve the mystery of which plant species Captain Smith observed, I compare the botanical descriptions of wild rice and several other possible species that were mentioned either in s...

Fifty two crossbred ewes conceiving to a synchronised oestrus in January 1987 were ultrasound scanned for littersize and subsequently allocated according to littersize to twogroups (Lupin or Sorghum grain). The ewes grazed on dry Phalaris/clover pastures with supplementation (200 g/h/d) commencing 'at 100 days post conception at a rate of 200 g/h/d and continuing until parturition at which time...

BACKGROUND AND AIMS The study of rapid evolution in invasive species has highlighted the fundamental role played by founder events, emergence of genetic novelties through recombination and rapid response to new selective pressures. However, whether rapid adaptation of introduced species can be driven by punctual changes in genome organization has received little attention. In plants, variation ...

Recent discussion about pasture persistence concentrates on pastures based on perennial ryegrass, the most commonly used grass species. This paper raises the question as to whether some of the causes of poor pasture persistence are due to perennial ryegrass being used in environments to which it is not suited. The adaptation to environmental stresses, particularly water, temperature and nutrien...

Herbicides that inhibit acetyl coenzyme A carboxylase (ACCase) are commonly used in Mexico to control weedy grasses such as little seed canarygrass (Phalaris minor). These herbicides are classified into three major families (ariloxyphenoxypropionates (APP), cyclohexanodiones (CHD), and, recently, phenylpyrazolines (PPZ)). In this work, the resistance to ACCase (APP, CHD, and PPZ) inhibiting her...

Arrowroot (Maranta arundinacea) and Chitosan are two well-known materials used in medical and scientific applications. Both materials possess medicinal properties and have the ability to form thick gels. Chitosan-reinforced Arrowroot film was developed and its dielectric characterization was performed at microwave frequencies. Cavity perturbation method was used for the measurement. The study p...

ergovaline, the main ergopeptine alkaloid produced in tall fescue ( fescue arundinacea schreb.) infected with endophyte ( neotyphodium coenophialum morgan- jones & gams), is known to cause tall fescue toxicosis. this study was conducted to examine the presence of fungal endophytes in five populations of tall fescue collected from various regions of iran. the existence of neotyphodium mycelia in...