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Rhizoctonia solani root rot on corn roots, magnified 0.63X. Damping off can be prevented or controlled in several different ways. Sowing seeds in a sterilized growing medium can be effective, although fungal spores may still be introduced to the medium, either on the seeds themselves or after sowing (in water or on the wind).
Helianthus tuberosus is a herbaceous perennial plant growing to 1.5–3 m (4 ft 11 in – 9 ft 10 in) tall with opposite leaves on the lower part of the stem but alternate towards the top. [7] The leaves have a rough, hairy texture. Larger leaves on the lower stem are broad ovoid-acute and can be up to 30 cm (12 in) long. Leaves higher on the ...
The plant can achieve a height of 30 cm (12 in). Weeding is necessary but it is important not to damage the root system. A sufficient water supply during summer is important. [9] Harvest is from November to March. It is important that the soil is not frozen when harvesting. [10] The storage of S. affinis tubers is difficult. Because of their ...
Ditylenchus dipsaci is a plant pathogenic nematode that primarily infects onion and garlic. [2] It is commonly known as the stem nematode, the stem and bulb eelworm, or onion bloat (in the United Kingdom). [3] [4] Symptoms of infection include stunted growth, discoloration of bulbs, and swollen stems.
Planting infected seed potatoes can also be a source of inoculum to a new field. Finally, insects have also been shown to transmit the disease. Many insects including potato leaf hopper, leaf cutter bees, and aphids have been observed transmitting conidia of Verticillium and because these insects can cause damage to the plant creating an entry ...
Hypersensitive response (HR) is a mechanism used by plants to prevent the spread of infection by microbial pathogens.HR is characterized by the rapid death of cells in the local region surrounding an infection and it serves to restrict the growth and spread of pathogens to other parts of the plant.
The symptoms include leaf chlorosis, stunting, and leaf drop. It is transmitted through the soil and through vascular wounds in plant material. Fusarium oxysporum f. sp. canariensis causes wilt of Canary Island date palm and other propagated palms. The disease is spread through contaminated seed, soil and pruning tools. [6]
The artichoke (Cynara cardunculus var. scolymus), [1] also known by the other names: French artichoke, globe artichoke, and green artichoke. In the United States, [2] it is a variety of a species of thistle cultivated as food. The edible portion of the plant consists of the flower buds before the flowers come into bloom.