Weed management process in cassava cultivation in the Southeast region
21/06/2023
Weed management process in cassava cultivation in the Southeast region 20/06/2022 Weed control in agricultural production in general and for cassava in particular is very difficult and costly. If we do not have the right method and technique, we will not kill the weeds thoroughly, helping the cassava plant to grow and develop well for the highest yield and save costs. Today Mobile Plant Doctor would like to share with you, cassava growers "Technology of using herbicides in cassava cultivation in the Southeast" as follows: 1/ SPRAY HERBICIDE FOR THE 1ST TIME: - After planting 3-5 days (to allow the soil to shrink) - Spray in the early morning when there is dew, the soil is still wet - Use herb SAICOBA 500EC - Dosage 1.2 liters/ha, mixed in 400 liters of water (corresponding to 40-45ml/16- liter tank) - If the field is left with old weeds before planting, use an additional amount of 1.5- 2.0 liters/ha. 2/ SPRAY HERBICIDE FOR THE 2ND TIME - After planting 2.5-3 months. - The cassava plant has a height greater than 40cm. - Or when entering the rainy season, prepare for additional fertilization - Use FASFIX 150SL herbicide - Dosage 2.0-2.5 liters/ha, mixed in 400 liters of water (corresponding to 80-100ml/16 -liter tank) - Using a directional spray nozzle, spray close to the ground about 10cm, avoiding spraying on the cassava buds - After 5 days of spraying, the weed gradually dies and up to 10 days the weed dies completely. The farmers apply additional fertilization to the cassava plant. Wishing fellow farmers bumper crop and a good price. |
To prevent, in addition to plowing and burying weed seeds, collecting weed stalks and stumps left after tilling the land to burn, not letting weeds produce seeds in production fields, etc., the use of chemical products is still a measure. optimal because of its ability to thoroughly kill weeds, reduce labor and take advantage of more time than manual weeding.
Miner has the scientific name Phyllocnistis citrella Staint., family Phyllocnistidae, order Lepidoptera. The miner occurs in many countries in the tropics and subtropics. The main host of the miner is the citrus family - Rutaceae. In addition, the miner also attacks mangosteen and some other plants.
Adult is a small planthopper, with a body 2-3 mm long, the whole body is ash gray, slightly greenish, the wings are opaque with many small brown spots.Eggs are oval, 0.3 mm long, have a pointed end and are attached directly to the leaf surface, leaf axils.
Green bugs specialize in the fruit of citrus groups (oranges, tangerines, lemons, grapefruits, kumquats...), some people call them orange bugs, or orange suckers. Their scientific name is Rhynchocoris poseidon or Rhynchocoris humeralis.
In Vietnam, yellow leaf curl disease is very common on papaya trees, especially the disease is often severe in areas of high and continuous planting, areas with hot and arid climates. The disease has significantly reduced the yield and quality of papaya. Gardens that are infected early when the plants are young may not yield. However, up to now, many gardeners still do not know the cause and how to fix it.
Spider mites are common pests on citrus trees, especially in hot and dry climates that are suitable for spiders to grow and cause severe damage.The group of harmful spiders is usually very small in size, unlike the natural enemy spiders.
This group includes species that are generally very small in size, causing damage by sucking plant sap (on leaves, fruits, branches, stems).
There are many species of mealybugs present on the group of Oranges,Tangerines,Grapefruits and Lemons (Citrus), which can be divided into 2 groups:
+ Group of sticky mealybugs with common varieties such as Lepidosaphes, Aonidiella, Coccus and Saissetia.
+ Group of flower mealybugs with common genera and species such as Pseudococcus, Planococcus and Icerya purchasi.
Dry branches and berries disease often appear to be common damage on coffee gardens during the rainy season. The disease causes death of branchs, dry fruit, severely affects the canopy structure and coffee yield if not paid attention to prevention.
Pink disease commonly causes diseases on rubber plantations in the rainy season, especially on garden from 4-8 years old. This year, rubber has to go through a period of severe drought, weakening the tree, so now in tnshe rainy season it is easy to get infected. Therefore, it is necessary to pay attention to good management to avoid affecting the garden.
In recent years, the area of citrus has been expanded because it is a fruit tree with high economic efficiency. However, in order to sell at a high price, not only in quality but consumers also require the external beauty of the fruit, so pest management on citrus is a matter of great concern to farmers. The hot season is a favorable condition for thrips to develop and cause damage, affecting the commercial value of fruit.
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