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Vertical distribution of photosynthesis in crops of tobacco and sorghum was determined at intervals throughout the day using a portable chamber exposi...Read more
Young plants of 5 species were grown in pots for 8-16 days in daylight under shades constructed of 6-mm strips. The shades were fixed or were made to ...Read more
Tobacco cv. Virginia Gold infested with blue mould (Peronospora hyoscyami f. tabacina) and fresh, wilted or dried plants of tobacco and Atriplex nummu...Read more
To evaluate the potential effects of genetically engineered (transgenic) plants on soil ecosystems, litter bags containing leaves of non-engineered (p...Read more
Agrobacterium tumefaciens was used to introduce two marker genes (kanamycin resistance and β-glucuronidase) into tobacco. These plants were grown in a...Read more
Although crop rotation has been used for centuries to enhance agricultural production, there are surprisingly little data justifying the use of one ro...Read more
New invading pathogen strains must compete with endemic pathogen strains to emerge and spread. As disease control measures are often non-specific, tha...Read more
A number of insect vectors of plant-virus diseases make only transitory visits to the crop in which the economic effects of the disease are important....Read more
Classical biological control has been a key technology in the management of invasive arthropod pests globally for over 120 years, yet rigorous quantit...Read more
This paper presents the results of studies conducted to determine the effect of the control of invading plant pathogens in increasing their rate of sp...Read more