Cartland Pest and Pest Control Flower Clinic

Cartland is an epiphytic orchid of Orchidaceae, native to tropical and subtropical America, with Colombia and Brazil being the most wild. Its colorful, large and fragrant flowers, known as the "king of tropical orchids", Colombia, Brazil, Costa Rica and other countries take Cartland as the national flower. Due to the infection of diseases and insect pests, the growth of some organs of orchid plants was blocked, resulting in the decrease of ornamental value and economic value of orchids. Therefore, in the daily maintenance process of Cartland, it is necessary to strengthen the prevention and treatment of diseases and insect pests in order to reduce losses. The main diseases and insect pests of orchids and their control methods are introduced below.

Disease

Anthracnose mainly affects the leaves of Cartland. In the early stage of the disease, light-colored sunken spots are produced on the leaves, and small concentric round particles are produced at the diseased spots, and then the spots gradually become round, and the color of the spots gradually deepens until dark brown, and in severe cases, the whole leaf turns black. Most of them are caused by poor ventilation and muggy heat, and excessive nitrogen fertilizer is also easy to cause the infection of this bacteria.

Prevention and treatment: remove diseased leaves and smear fungicides on the wound. Strengthen ventilation, reduce humidity, increase the application of phosphorus and potassium fertilizer, and enhance the disease resistance of orchids. And spray with carbendazim, chlorothalonil or methyl thiophanate wettable powder 500 times, and then spray once every 10 to 15 days.

Flower blight often harms Cartland's flowers or inflorescences, and young buds are also susceptible to infection. The infected part is a sunken dark brown to black spot, which is usually covered with white mycelium and small pink spores. Severe infection can cause flowers to turn yellow and wither in the bud stage. The disease can also infect leaves, with small spots in the injured tissue. It is mostly caused by stagnant water in flower sheath, high temperature and humidity.

Control methods: pay attention to the environmental humidity should not be too high in the process of cultivation, especially when the temperature is low at night. Be careful not to sprinkle water into the flower sheath when watering during flower bud differentiation. The diseased flowers should be cut off when the plant is sick, and the soil should be sprayed and irrigated with 80% mancozeb or 50% carbendazim wettable powder 500 times every 4-7 days.

Fusarium wilt mainly infects the rhizome, making it purple, and the conducting tissue becomes pink-purple, which can also be extended to pseudobulbs and roots. The leaves turn gray and the plants wither and die due to clogged ducts.

Control methods: remove diseased plants and bacteria-carrying soil, spray, soak or irrigate the soil with 50% carbendazim or 50% carbendazim wettable powder 500 times. 0.5% formalin can also be used.

In the initial stage of flower rot infection, light brown, very small water spots appear on the perianth, and then the spots become larger and cause the whole flower to rot, but the disease is limited to flowers, so it is also called flower spot or brown rot. The disease is easy to be infected in the environment of high humidity, poor ventilation and high temperature at night.

Prevention and treatment: if the weather suddenly drops before flowering, the indoor humidity should be reduced immediately, and 50% carbendazim 500 times solution or 1% stone sulfur mixture should be sprayed to prevent the occurrence of flower rot. Other fungicides can also be used, but drugs such as carbendan can not be used to hurt flowers.