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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).
With help from gibberellic acid, ‘Imperial Star’ can produce as much as 1,540 pounds per acre, while ‘Green Queen’ can produce 10,485 pounds per acre, Agehara said.
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.
Tropical plants may begin to experience cold damage when the temperature is 42 to 48 °F (5 to 9 °C), symptoms include wilting of the top of the stems and/or leaves, and blackening or softening of the plant tissue. Frost or cold damage can be avoided by ensuring that tender plants are properly hardened before planting, and that they are not ...
Bacterial spot is spread from plant to plant through water, wind, and plant contact. Once infected, the leaves of the plant are targeted by the disease. The disease causes severe spotting of the pepper and kills the leaves. [108] This is a twofold problem because the defoliation results in the pepper being discolored by sunscald.
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 ...
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 ...
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]