Category: Science

SOIL BORNE DISEASE OF PLANT CROPS

Soil Borne DiseaseĀ Of Plant Crops   Fungi species live saprophytically on dead organic matter on or in soil (biosphere) where they are regarded as that most important decomposers of plant residues and other organic ‘matter. Many fungi species produce the enzyme needed to degrade the lignin and cellulose in plant residues and so initiate the […]

THE IMPORTANCE OF PLANT DISEASE

IMPORTANCE OF PLANT DISEASE Fossil evidence indicates that plants were affected by disease 250 million years ago. Loss of crops from plant diseases may result in hunger and starvation, especially in less developed countries where access to disease control methods is limited and annual loses of 30 to 50 percent are common for major crops, […]

DISEASES OF TUBER CROP, FRUITS AND VEGETABLES

DISEASES WHICH TUBER CROPS VEGETABLE AND FRUITS SUFFER IN STORAGE AND TRANSIT INCLUDES Fusarium Rots: this disease is caused by fungi. It causes oses during transportation and marketing of vegetables. The disease is oil-borne (they are present in the soil). So as corps are harvested, they already have the disease (contamination but may not have […]

ENVIRONMENT AND DISEASE DEVELOPMENT ON PLANTS

Environment and disease development onĀ plants   Within the ecosystem, the condition of air, water and soil, to a large extent determines whether plant diseases would be epidemic or epidphytotic 1.e a condition when the number of individual plant   a disease affects can increase dramatically.   1. TEMPERATURE: Each pathogen has an optimal temperature for […]

METHOD OF PATHOGEN INVASION

METHOD OF PATHOGEN INVASION AND IMPACT   Parasites enter the body of host (humans, plant, animals)in the form of egg, Cyst, active or vegetation forms as thethree Ppathogens transmissible and infective stages, which are living structures with potential for growth, enter a particular anatomic site and grow within specific location. They are able to cause […]

COMPONENTS OF THE CELL part(2)

(d) chloroplasts Chloroplasts are intricate organelles found in some plant cells. Light energy can be captured by the green chlorophyll pigment of chloroplasts and used to power the process of photosynthesis where by complex food molecules are built from inorganic raw materials.A chloroplast is a large structure (approximately 5000-10000nm in diameter) usually shaped lke a […]

COMPONENTS OF THE CELL

1. The cell wall   Every cell is delimited from its environment by a plasma membrane but many cells also posses a cell wall which lies out side the membrane. A complex outer cell wall made of the carbohydrates cellulose and peotin is a characteristics of most plant cells. It forms a permeable framework which […]

CELLULAR BASIS OF DISEASE

CELLULAR BASIS OF DISEASE   Biological science has progressed by breaking down complex fields of study into their component parts to ensure specialty with the aim of proffering solution to challenges of threat to ife and environment. Pathology is a component part of biology. Pathology addresses 4 components of mechanisms of disease cause/etiology development (Pathogenesis), […]

PATHOGEN

PATHOGEN A pathogen is an important parasite causing a wide   range of acute and chronic infections through pathogen-host interactions (PH/S). Pathology is a research field in life science (biology), focusing on the biological damage due to interactions among biological entities.It is the extreme distortion of cellularstructure and function by biological entities. The biological interaction […]