Why is your Chinese rose getting weaker and weaker?
Today's focus is to introduce the related content about why your Chinese rose is getting weaker and weaker in terms of green plants, and then let everyone understand together.
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This article is one of the original theories
Excerpt from the "Three-Step Method for Raising Chinese Roses" series
About the pest damage of Chinese roses, several common pests have been introduced, which are easy to detect. Today, I'm going to introduce a kind of underground pest to you.
It is extremely harmful but often not easily detected. Therefore, it is ignored by us, leading to very serious consequences.
It is the larva of the scarab beetle!
The scientific name of the larva of the scarab beetle is grubs, which are the larvae of the scarab beetle, also known as white soil caterpillar, walnut worm, and in some places, it is called ground old (H). It is a worldwide underground pest. Its main harm is to gnaw on the roots, stems, and newly sown seeds of plants.
The occurrence law of the larva of the scarab beetle:
The larva of the scarab beetle always stays in the soil, when the soil temperature at 10 cm reaches 5°C, its activity range begins to rise to the soil surface, and when the soil temperature reaches 23°C or above, its activity range migrates to deeper soil.
The larva of the scarab beetle is attracted to unrotted manure and also has a gregarious nature, so we often find many scarab beetle larvae in compost.
How to find the larva of the scarab beetle?
The larva of the scarab beetle is always active underground and is difficult to detect. However, it can still be found through careful observation.
Three major signs of the presence of the larva of the scarab beetle in potted Chinese roses:
1. The growth of Chinese roses becomes weaker
The larva of the scarab beetle hides in the potted Chinese roses and mainly eats the roots of Chinese roses. Therefore, if you find that your Chinese roses are starting to weaken, you need to pay attention.
2. The plant is loose, and the roots are unstable
When watering the potted Chinese roses, if you find that the plant is easy to loosen, as if the roots are not very stable, you need to pay extra attention and observe.
3. The amount of potting soil decreases
If one day you feel that the soil in your potted Chinese roses seems to have decreased, then you need to pay attention and observe whether there is always a small area of the potting soil that remains moist and does not dry out.
If the potting soil decreases and there is always a small area that does not dry out, it is likely that the larva of the scarab beetle has moved into your flowerpot.
Notice: If your potted Chinese roses exhibit all the above three situations, there is no doubt that the larvae of the scarab beetle have moved in as a group.
Methods to control the larva of the scarab beetle:
As mentioned above, the larva of the scarab beetle is attracted to unrotted manure, so it is necessary to avoid using unrotted chicken manure, sheep manure, and other organic fertilizers.
Of course, unrotted organic fertilizers themselves are risky for burning seedlings and are not recommended.
If you find the larva of the scarab beetle in the flowerpot, you must change the soil in time. Because the larvae of the scarab beetle usually move in groups.
If you find one larva of the scarab beetle in a flowerpot, there are usually about 15 other larvae hiding in the potting soil.
So, if you find the larva of the scarab beetle in the flowerpot, you must change the soil immediately. Since the roots of the Chinese rose have been damaged and weakened, when changing the soil, you should move the Chinese rose into a smaller pot for care to promote the recovery of its roots.
In fact, the larva of the scarab beetle is most likely to occur in ground planted Chinese roses because we often have the habit of burying manure for ground planted Chinese roses.
How to prevent and control the larva of the scarab beetle in ground planted Chinese roses? Due to limited space, I will not elaborate on this here.
Have green plant enthusiasts understood all the content mentioned above about why your Chinese rose is getting weaker and weaker?