Cucumber retting root symptoms
Cucumber retting root is a common physiological diseases, cucumber disease occurs when, after no longer cucumber roots to grow new root or adventitious root, root bark is dark brown, and root rot, eventually lead to plant wilting.Cucumber retting piece dry, as the serious when can cause the field plant on the face of it, similar to deficiency symptoms.Long retting root, kanagawa spore plants are easy to be tomato disease infect root rot, decay is damping off or root rot fungal infection happened.
Cucumber retting root disease conditions
Cucumber retting root is mainly caused by ground temperature too low or the soil humidity, local temperature is lower than 12 ℃, and the duration is longer, if it meets the water continuous YinYuXue etc. Bad weather or too much, can appear the cucumber plant wilting, if wilting time long, cucumber retting occurs.After retting root cucumber cotyledon leaf to show the yellow-green or plant part, and the blade edges are withered, serious when the whole leaf will shrivel withered, plant growth is very slow.Among them, the retting root in cucumber cotyledon stage, cotyledon will be dried up;Retting root in a true leaf stage, the leaf withered, accordingly can judgment in the performance of retting upper cucumber leaves from the ground root time and reason.
If the ground temperature is lower than 6 ℃ or so for a long time, especially the night temperature is too low, lead to stop growing cucumber growing point, old leaves grow brown edges, eventually led to the deaths of plant dry.
Cucumber retting root of prevention and cure
(1), fine armor frost seeds with 53% of manganese, zinc water dispersible granule 500 times liquid seed handling, can effectively prevent the retting root, and can improve the germination rate and improve the cold stress resistance of plant.
(2) do not use strip surface cultivation, it is recommended that the promotion of ridging cultivated, can effectively reduce the cucumber retting root.
(3) the ground leveling, avoid water field.
(4) in order to strengthen the management of ground temperature, avoid ground temperature too low or the soil humidity, appropriate ventilation time and ventilation rate.
(5) the low temperature electric hotline seedling recommended temperature, temperature control in around 16 ℃, not less than 12 ℃.
(6) the cucumber engraftment after cultivating HuaChu in time, improve the ground temperature, promote root growth.
(7) in a timely manner after the occurrence of retting root spraying nutrient solution 2003 1000 times liquid, and can effectively alleviate the illness.
