In spring, the weather is changeable, with alternating cold and warm, and greenhouse vegetables are less resistant, which is conducive to the occurrence of many diseases. To prevent and control diseases, vegetable farmers will increase the concentration of pesticides or use frequency. In actual production, vegetables in the flowering and fruiting period are prone to phytotoxicity when they are used. Therefore, vegetable farmers need to pay extra attention.
Anthers should be used correctly in production. Many vegetable farmers have misunderstandings about using anthers, which can be divided into two situations.
The first is that the timing of flower placement is unreasonable. Too early or too late will affect pollination and fruit development. If you take time too early, it is easy to form a rigid fruit, on the contrary, it is easy to form a cracked fruit.
The second is that the concentration of anthers is too small or too large. If the concentration of anthers is too small, it will be difficult for the flowers to successfully pollinate, and the flowers and fruits will fall. If the concentration of anthers is too large, it is easy to form fruit cracks. Therefore, in different seasons, different temperatures, different varieties, the concentration of anthers is different, even if the concentration is the same, and the time spent is different, the effect is also different.
When spotting flowers normally, first pay attention to the temperature of the shed. The concentration of anthers varies with different temperatures. It should be noted that the concentration of any anthers should decrease with the increase of temperature to avoid the formation of abnormal fruits due to excessively high concentrations of anthers. In addition, it has become a common measure to add medicaments to the anthers to prevent diseases, but the type and safe dosage of medicaments should be paid attention to, otherwise it is easy to cause harm.
The concentration of pesticides should not be too high. Some pesticides can cause delamination of the fruit stalk and cause the flowers and fruits to fall off, especially when the concentration is too high or in high temperature conditions.
When the pesticide concentration is high or the smoked shed time is long, and it is just before the flowering or flowering stage, it can cause flower and fruit drop. Sometimes even spraying foliar fertilizer and trace element fertilizers also has this problem. Such as melons and solanaceous vegetables, it is better to avoid the flowering period even when spraying boron fertilizer, or avoid the flower part deliberately during the blooming period.
Reasonable use of "azole" agents to promote fruit development Common azole agents on the market can be divided into four categories: triazoles, imidazoles, oxazoles and thiazoles. Among them, except for difenoconazole, cyanofamidazole, pyriconazole, oxaconazole, zinc thiazole, oxamethazole, imidazole, and ecloconazole, etc., other azoles have no obvious effect on controlling proliferation The medicament has the effect of controlling prosperity more or less. If other azoles with inhibitory effects are used in the flowering and fruit period, it is easy to produce phytotoxicity and inhibit fruit growth. There are also inorganic copper preparations, which are also prone to phytotoxicity when used in the flowering and young fruit stages, thereby inhibiting flower pollination or fruit expansion. Therefore, it should be used rationally to promote fruit development.
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