What medicine does the latest orchid leaf blight use?

Orchid leaf blight is a serious disease that harms orchids. It usually spreads to the branches and leaves of orchids very quickly, and the disease rate is very fast. In almost a few days, the whole diseased seedling turns yellow and withered, which is similar to soft rot. It is just that the diseased plant of orchid blight has no peculiar smell after death, while the diseased plant of soft rot smells bad after being pulled up. Let's take a look at the medicine used for orchid leaf blight.

Symptoms of orchid leaf blight

Orchid leaf blight begins to yellowed on one side of the new or old grass (the metabolic grass yellowed at most, and the disease yellowed almost at the same time. Metabolism of only yellow old grass, the outbreak of leaf blight is regardless of old grass and new grass), within a few days the whole diseased seedling turned yellow and withered and died, and in serious cases, the disease occurred one by one, until the whole pot of orchids died of disease.

Occurrence regularity of orchid leaf blight

Orchid leaf blight is a disease caused by fungi, and the pathogen is Phalaenopsis. The pathogen overwintered or oversummer on the diseased leaves, and when the conditions were suitable, the pathogens spread by wind and rain and water drop sputtering during watering, mainly from the wound or directly from the epidermis of tender leaves. The disease occurred in the old leaves from April to July, and reached the peak from late May to June. The disease period of new leaves is from July to November, and the damage of new leaves is heavier than that of old leaves. Guangdong began to develop the disease in mid-December every year, suffered seriously in March of the second year, and the condition tended to be stable after May. The disease is easy to occur under the conditions of suitable temperature, high relative humidity or moist leaf surface, and the disease is serious under the conditions of soil consolidation, over-dense potted flowers, poor ventilation and light transmission.

What medicine does orchid leaf blight use?

1. Strengthen management: greenhouse should be ventilated and transparent, flowerpots should not be placed too dense, and new soil should be replaced when potted. Timely removal of diseased leaves and their remains in order to eliminate the source of infection and prevent the spread of the disease.

2. Chemical control: 0.5% Bordeaux solution or 65% Dyson zinc wettable powder 600% 800 times solution can be used before the disease, sprayed once every 7 to 10 days, which has a good protective effect. During the onset of the disease, 50% carbendazim 800x solution or 75% methyl topiramate 1000-fold solution can control the spread of the disease.