Summer walnuts enter a period of vigorous growth, new shoot growth accelerates, young fruit expands, flower buds begin to differentiate, requiring a lot of nutrients and water. At this time, we must pay attention to the management of walnuts, in order to promote the growth and development of walnuts, to ensure their production and quality, then how to effectively manage? Let's take a look at the following.
First, the prevention and control of walnut pests and diseases
1. Black spot disease
From May to June, spray 1:2: 200 times Bordeaux mixture or 50% methyl thiophanate WP 500-800 times solution. Spraying difenoconazole once in mid-May can effectively prevent walnut black spot.
2, brown spot disease
Remove diseased leaves and combine pruning with diseased tips, deep burial or burning off: In mid-June, spray 1:2:200 times Bordeaux mixture or 5-phenylene ether carbazole.
3, anthracnose
From June, every 10-15 days, spray the pesticides that control "walnut anthracnose", such as rice fresh amine, difenoconazole, pyraclostrobin, tebuconazole, Bordeaux mixture, mancozeb Or their compound medicine.
4, the limb moth
Artificial control: the disease fruit was removed in time before August; thoroughly clear the garden before winter, ploughing the soil to eliminate the wintering insects; adult emergence period. Use sex attractants to trap male adults and reduce mating. Reduce the density of the offspring. Chemical control: Before the adult is unearthed, the poisonous soil is sown in the tree. 25% of the phoxim microcapsules should be shallow after application; the spawning period (early from early June to early July) is 25% west every 10-15 days. The vitamin WP can be sprayed on the tree by 400 to 500 times and Bt-%N.
Second, fruit development nutrition supplement
1. Apply water-soluble quick-acting fertilizer
From the beginning of May to the beginning of June, the fruit is growing rapidly, and the amount of fertilizer is the most. If the nutrient is insufficient, the fruit will grow little. At this time, the topdressing should be based.
2. Timely supplementation of calcium
From the beginning of June to the beginning of July, for the hard core period of the core, the calcium should be replenished in time during the hard core period, mainly by foliar application, to avoid the appearance of dew and fruit shape.
3. Timely supplementation of potassium
From early July to early September, it is a period of rapid increase in nut fat content. After the fruit is shaped, the weight is increasing, the nucleolus is continuously full and full, and the oil content is increasing. To ensure the quality, potassium should be added in time to improve the quality of the Nuts and eliminate the taste.
The above is the main point of summer walnut management. Walnuts are now grown in many areas, but in order to get the most benefit, it is necessary to ensure that the walnuts are of high quality and quality, so these managements can not be sloppy.
For the wonderful pictures and popular comments about walnuts, you may be interested in the following recommended contents of Hui Nong. Welcome to read.
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