Citrus moss is so harmful that it is easy to break out in June, do you really attach importance to it (with control methods)

This article was originally created by Dafengshou Citrus Plant Protection (dfsganjuzhibao) and declined to be reproduced without permission. However, you are welcome to forward it to moments.

As a cash crop in the south, citrus is planted in high-temperature and rainy areas, which facilitates the growth of citrus moss. Coupled with the extensive use of low-quality foliar fertilizer, the harm of moss began to spread.

Moss is originally a secondary disease, but with the increase of planting area in areas with good hydrothermal conditions, such as citrus hot Guangxi, many fruit growers do not pay attention to moss, but some people think that growing moss on the tree trunk is very good, showing a good orchard environment. As a result, it backfired and seriously affected the growth of citrus.

Fig. 1 tree trunk moss

Moss: algae that grow rapidly

Moss is a parasite algae, with false roots attached to the branches to absorb water and nutrients in the host, like the high temperature and humidity environment, mainly attached to the branches, serious, will spread to the leaves and roots of the soil surface.

Fig. 2 damage to moss of old trees

Harm: it is not possible to finish two sentences.

Affect photosynthesis

Once the moss spreads to the leaves, it will affect the photosynthesis of the tree, block the stomata, reduce the accumulation of nutrients, and compete with the fruit trees for water and nutrition, resulting in the weakening of the tree.

Fig. 3 moss covered with leaves

Affect the effect of medication

The moss will also cover the surface of the tree like a film, affecting the effect of spraying pesticides and foliar fertilizer.

Fig. 4 affects the efficacy of medication.

Increase diseases and insect pests

In addition, moss also provides a hotbed for spores of some fungal diseases to harm fruit trees, and the corners covered with moss between some branches have become hiding places for germs and pests.

Fig. 5 spread of disease

Reduce the commerciality

If the moss is too serious and spreads to the fruit, it will reduce the commerciality of the fruit and fail to sell at a good price.

Fig. 6 damage to fruit

Indirect harm can not be ignored

After talking about the direct harm to the tree, the indirect harm is also very great, because the moss on the surface of the soil layer will also affect water infiltration and soil gas exchange.

Figure 7 affects water infiltration and soil gas exchange.

What kind of orchard is prone to moss damage?

An orchard despised by the manager

As mentioned earlier, some managers do not pay attention to moss, and some people think that it is good for moss to grow on trees, resulting in moss out of control.

Fig. 8 moss out of control

A closed orchard with high humidity

In orchards with closed shade and high humidity, the orchards with aging and weak trees are also prone to the outbreak of moss.

Fig. 9 Orchard with closed canopy and high humidity

Explosive period: period of high temperature and humidity

Moss is easy to break out in summer and autumn. the peak periods of moss outbreak are from March to May and from September to October, respectively. The hydrothermal conditions are the best in these two periods, and it is also the period when citrus is the most important but sprays the most foliar fertilizer.

Fig. 10 easy to erupt moss in the period of high temperature and humidity

Correctly deal with the harm of moss

According to the growth characteristics of moss, reducing closed and humid environment, reasonable pruning and timely garden cleaning can reduce the occurrence of moss.

For moss that has already appeared, the following drugs can be used (recommended for tangerine, dim light vinegar)

Strong oxidants: chlorobromocyanuric acid, peracetic acid

Inorganic copper preparations: cuprous hydroxide, cuprous hydroxide, cuprous hydroxide

There are algicidal fungicides: bromogermicin and thiamidone.

Sulfur-containing pesticides: allicin, benzoylammonium; (attention in young fruit stage)

Other substances: mineral oil, ammonium bicarbonate, plant ash, sodium oleate.

Add Dafengshou citrus plant protection WeChat account (dfsganjuzhibao) to learn more citrus planting skills.