What happens when the leaves of the pitcher plant start to turn black?

Nepenthes is susceptible to leaf spot, root rot, sunburn, etc. Leaf spot and root rot are more harmful. [31]

Leaf spot. Symptom characteristics: water-stained and small spots appear on the leaves, gradually expanding, forming oval spots, brown.

The diseased part produces a black mold layer, which ruptures later. It seriously affects the growth and ornamental effect of plants. [31] Prevention and control methods:

Strengthen management to promote the health of plants and enhance disease resistance. Spray 10% antibacterial agent 1000 times. It is required to spray evenly and thoughtfully throughout the plant.

Root rot. Symptom characteristics: When the growth is weak and the resistance to diseases and insects is reduced, it is easy to induce the occurrence of diseases, so that the growth of Nepenthes is lifeless, the roots are browned and have no new roots, rot, and the aboveground parts wilt.

Caused by the invasion of Fusarium, some of which are highly pathogenic and produce toxins to invade plants; Some are weak and only infect when there is a wound or when the plant is weakened. Low temperatures and overwatering are the main triggers. [31] Prevention and control methods:

At the initial stage of the disease, spray 900 times of 50% Likun net wettable powder, 800 times of 50% root rot wettable powder or 800 times of 80% Duofu zinc wettable powder. [31]

Root mealybug. Prevention and control method: spray or root with 100 200 times of Kaisuling gel suspension, 1000 1500 times of 40% quick-culling emulsifiable concentrate or 700 800 times of 25% Ekkas emulsifiable concentrate. [31]

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Causes of blackening of leaves.

Nepenthes will grow well as long as it provides a good enough growing environment and can do everything you can think of. But pitcher plants are very demanding. The leaves turn black because of the wrong temperature, humidity, lack of light, or even too much pitcher plant!

With each slight mistake, the pitcher plant will show something in appearance.

Solution. Watering to the right amount.

Most families use the dipping pot method to water pitcher plants is to soak the whole pot in water to moisten the soil, which can ensure that the watering is even, not easy to accumulate water, and can also solve the problem of insufficient humidity. But during watering, do not spill the water over the edges of the pot. When you have free time, spray more water on the net leaves.

In winter, you can put a plastic bag on the pots and plants to maintain the humidity. In the choice of water quality, try to choose soft water. If you are in the north, you can use rainwater, air-conditioned water, distilled water, and relatively few minerals.

If you are in the south, you can use tap water directly.

Reasonable temperature control. When the temperature is low, move the pitcher plant indoors for maintenance. Try to keep the temperature above 20. When the temperature is too low, the pitcher plant can reduce the leaves and even wilt the cage.

Plenty of light. In winter, the sun is weak, but it is still guaranteed to be abundant, and Kaishi is directly exposed to the sun for 2 hours, and the rest of the time the light is scattered. In summer, the sun is poisonous, try not to be exposed to the sun all day and accept scattered light.

Feed the insects reasonably. In order to reduce fertilization, many flower lovers take the initiative to feed Nepenthes Qi Sun Yuan, and feed Kungao Collapsing worms into the cage of Nepenthes. This is a major misunderstanding.

Nepenthes are not eaten like humans, and insects cannot be fed as food. If too many insects are fed, the cage will gradually wither and the leaves will turn black. Therefore, it is necessary to control the amount of insect feeding.

Generally, it is good to feed 2 or 3 of them once every two or three days. While feeding the insects, reduce fertilization.

The humidity is not 80 degrees.

This plant prefers moisture and loves darkness.

If you don't meet the above 2 points... will rot.

Reasons why pitcher plant leaves turn black:

It could be a sunburn.

It may be caused by high fertilizer concentrations.

How to do: Wipe the dark spots with water to see if they can be wiped off, there may be secretions and dirt in the air together.

You can also try to prepare carbendazim solution, half of the usual dose, and then pour it into the funnel of pitcher plants, about one-fifth full, if there is no funnel, only the roots.

Attention should be paid to when breeding:

Humidity: Do not dry, in addition, to knot cage control more than 50%. (Air humidity is not just a spray of water.) ）

Temperature: For normal growth, it is best not to fall below 15 degrees Celsius. Yellowing of leaves in the event of frost damage. In winter, if it is too cold, it can be moved indoors.

Sunlight: Avoid direct sunlight at noon in summer and direct sunlight throughout the day in winter. When there is enough light, the stems will appear red.

Watering: Once in the morning and once in the evening, water thoroughly. Do not use hard water.

Soil: Use peat soil.

Fertilization: Dilute leaf fertilizer can be sprayed, avoid soil fertilizer.

Pruning: When a leaf cage wilts, the leaf cage can be cut off.

It's okay, you water it frequently.