Recently, the author investigated various townships and townships such as Jitai Town, Luocheng Sub-district Office, and Sunjiaji Sub-district Office in Shouguang City and found that there are many problems in the current eggplant production. In order to enable the vegetable grower to manage the current eggplant production more rationally, these issues are summarised as follows for your reference:

A whitefly damage caused yellow leaf phenomenon

Shouguang City East Village Sanguancun Li Yujun

Many faded green macules were found on the leaves of eggplants, and there were black dots on the back of the leaves, which were even connected to pieces; it seriously affected the photosynthesis of the leaves. This situation was caused by whitefly damage.

In the greenhouse, whiteflies can overlap for many generations within a year. This year, whitefly activity is extremely rampant, resulting in serious losses in the production of various crops. Whitefly likes to injure solanaceous vegetables, melon crops, etc., especially Shouguang eggplant planting areas are mostly planted in August-September, which is the high incidence of whitefly. Since whitefly is generally preferred to spawn in young leaves, nymphs and adults are actively feeding on functionally vigorous leaves. The leaves are chlorotic and yellow spots, while the back of the leaves is black coal. This is due to the mildew that occurs when the whiteflies produce secretions in the back of the leaves, which often leads to mildew. Seriously affect the photosynthesis of the eggplant leaves.

Preventive measures: Remind the vegetable farmers to pay attention to the following points so that they can be prevented early in the coming year.

1 To promote the first greenhouse planting greenhouse whitefly and tobacco whitefly does not like to eat celery, garlic yellow, cruciferous crops, etc., to reduce the eggplant, melon crops planted area. 2 Add insect nets covering silver-gray mulch and yellow plates. Whitefly has negative tropism towards silver grey, so silver-gray mulch can effectively avoid whitefly. Whiteflies have already occurred in the shed, and whiteflies can be used to trap the yellow traits. 4 chemical control. Can choose to use green vegetables Pojiao Ning each one 15 kg spray control of water, can also be used to control fumigation to whitefly. 5 Infested areas that have been affected by whitefly have yellow leaf phenomenon, in addition to strengthening the control of whiteflies, plant growth regulators such as Fengshui No.1, Yunda 120, and Yun Daquan tree and fruit should be sprayed to alleviate the effects of insect pests on leaves. Bad effects.

Second, eggplant plant growth disorders, poor flower stature, eggplant is difficult to set fruit.

Shouguang City Jitai Town Fang Dongcun Yang Yanhui

It is understood that this year Shouguang City eggplant farmers generally early nursery time, coincided with the high temperature season. Due to the abnormal weather this autumn, the growth of eggplant plants was unbalanced, and poor flower bud differentiation resulted in poor flower bud development. 1 temperature does not apply. The eggplant requires a higher temperature during the fruit setting period, and the optimum temperature during the result period is between 25 and 30°C. The nighttime temperature should be between 15 and 20°C. The temperature is higher than 35°C. The growth is slow, the flowering is serious, and the performance is early in production. And summer heat results less. 2 Poor flower bud differentiation and bad flower development. The eggplant flower development is good, then the flower shape is large, color thick, flowering style longer or equal to the length of the anther, favorable pollination and fertilization, fruiting is good, and poorly developed, style shorter than the anther, it is difficult to get pollination, most of the fall Drop it. 3 Unbalanced growth. This year, the weather was arid and the climate was abnormal. As a result, the growth of eggplant plants was disturbed and the reproductive capacity was low. 4 Dressing time is not suitable. The general performance is that the top dressing is earlier and the plants are longer, resulting in the shedding of flowers and nuts. Improper proportion of fertilizer, so that the plants appear to be leggy, the imbalance between the vegetative and reproductive growth of the plant results in difficult fruit set.

Prevention measures: 1 timely nursery, timely planting. 2 After planting, balance and comprehensive fertilization, reasonable water supply, and maintain good water and fertilizer conditions. 3 properly control the temperature and lighting conditions, such as covering the shade net control shelf temperature. 4 For leggy phenomenon, but when spraying naphthalene acetic acid 40ppm to adjust what; after each spray can be added harvest No. 1 plant growth conditioning agent 800 times. 5 eggplant fruit shape is not correct, can be properly adjusted anther. If the temperature is high, the concentration of anthers can be appropriately reduced, and the concentration of gibberellin in the anthers can also be adjusted (for example, the effect of gibberellic acid is to lengthen the shape of the fruit).

Third, plant wilting, eggplant stalks have black heart, severe dead tree phenomenon.

Houcao Village, Jitai Township, Shouguang City

About 1/3 of farmers in Shouguang eggplant planting area have this situation. Especially in the 40 days or so, the black shoots of the seedlings are extremely dark, and many vegetable growers change their seedlings accordingly. For this reason, the author consulted the vegetable expert Wang Zhongchun. According to investigation and analysis, this condition is due to the insufficient healing of graft wounds, or insufficient supply of nutrients due to insufficient affinity of rootstocks and scions. This phenomenon is exacerbated with the growth of eggplant seedlings until the seedlings die.

Preventive measures: The blackening phenomenon of the stalks of eggplant plants caused by the above conditions can only be strictly monitored from the grafting work, so as to avoid adverse measures at the seedling stage and affect the quality of the grafted seedlings.

As far as the current situation is concerned, there is no way to recover any medicine. These vegetable farmers may consider transplanting other vegetable seedlings as soon as possible to minimize the damage.

Fourth, lack of disease.

Shouguang City Sunjiaji Sub-district Office Bei Mayi Village Fu Yubin

According to Fu Yubin, this happens every year in the production of eggplants in greenhouses. There are purple spots on the petals of eggplants, the leaves are yellow and green, and the young fruit after the fruit set has rot.

This is caused by the lack of boron and magnesium deficiency symptoms in eggplant. Therefore, it is necessary to supplement the boron and magnesium elements while strengthening water management. It can spray 0.3% borax or British boron, etc. Magnesium fertilizer can choose magnesium and trace element fertilizers.

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