Rose black spot disease so that flowers bloom full branches and big and colorful
Rose black spot is a common rose disease, so friends who like rose need to know the prevention and treatment of rose black spot. The following is to take you to understand next month's flower black spot!
Symptoms of black spot:
Black spot occurs in rose, and the twigs, pedicels and leaves of the plant may be infected with soybean oil, showing purple-brown or brown spots, which is the early stage of the occurrence of the disease spot.
Black spot will have dark brown or black spots of 3~5mm on the shoots and leaves of the plant, some of which have ciliated edges, while others have smooth and neat edges.
Rose leaves black spot disease, leaves will be easy to fall off, young branches and pedicels will have purple or black striped spots, slightly sunken, when the disease is serious, the middle and lower leaves of the whole plant will fall off, this situation is very serious.
Prevention and control of black spot disease:
(1)。 Find the source of infection of the bacteria, clean up and remove the diseased leaves and branches in time, and properly prune the serious diseases in winter. All the diseased leaves and branches need to be simple to avoid infecting other healthy leaves and branches.
(2)。 Usually pay attention to the size of the pot space, do not let the plant too dense, found that the branches are too long and too dense, need to be thinned regularly to maintain a transparent internal space, conducive to ventilation and lighting. Watering do not let the basin soil is too wet, wet environment is prone to germs, watering slowly along the edge of the basin, do not spray frequently.
(3)。 Drug treatment of plants at the early stage of the disease needs to start spraying at the initial stage, usually every 7 to 10 days. Medicine with chlorothalonil wettable powder 500 times liquid or in the market to buy a special agent, targeted treatment.
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