DRY COFFEE BRANCHS AND BERRIES DISEASE 21/06/2023

 DRY COFFEE BRANCHS AND BERRIES DISEASE 23/05/2022

 

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.

 

Symptoms and effects:

The disease usually appears on young parts, on flowers and fruits. On young branches and young fruit, the lesions are black and indented. When the disease attacks on the stem of the fruit, it will make the fruit dry. If the weather is favorable, the disease will develop gradually. When the disease spreads around the circumference of the branch, the branches above the disease will die, the entire fruit above the disease will dry and fall.

 

Harmful agents and conditions for arising:

The disease is caused by Colletotrichum gloeosporioides fungus .Coffee gardens planted thickly, over-fertilized with nitrogenous fertilizers, densely packed with weeds and with high humidity, suffer from severe disease. The disease also often arises and thrives in the rainy season, especially in the rainy, hot and humid months.. Currently, after a period of severe drought, coffee trees are exhausted, so their resistance is poor, so the fungus will have a very strong chance to grow. Therefore, it is necessary to pay attention to prevent this disease, in order to limit damage.

 

Some preventive measures:

Plant coffee at an appropriate density, avoiding thick planting to ensure ventilation.

There should be a good drainage system after rain, avoid high humidity in the garden.

During the rainy season, regularly clean the garden, except for weeds and prune dead and ineffective branches hidden in the canopy to create ventilation.

 

Avoid fertilizing with excess nitrogen, because it will make the garden dense and susceptible to disease. Should use more foliar fertilizers such as MULTI-K, or micronutrient fertilizer POLY FEED 15-15-30, spread CALCIUM NITRATE fertilizer to improve soil. These fertilizers will help strengthen the plant disease resistance, while increasing the yield and quality of coffee.

When the coffee garden just get infected or during the rainy months, it is necessary to spray control with CARBENZIM 500FL, or SAIPORA 350SC. Pay attention to spray prevention in the rainy season, every 2-3 weeks / 1 time depending on the weather situation. One of the above products can be combined with SK ENSPRAY 99EC mineral oil to increase and prolong the effect of the product.

Regularly check the garden during the rainy season, to detect diseases and handle them promptly, in order to reduce damage and reduce the cost of prevention.

 

Same item

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.To prepare for the coming Summer-Autumn rice crop, we would like to introduce to you a very new product of Saigon Plant Protection Joint Stock Company, which is Butoxim 5GR. This is a granular product used for spreading by Saigon Plant Protection Joint Stock Company in research, production and distribution.

 

 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.Larvae are very small, oval in shape, newly hatched are bright yellow. Age 2 and age 3 are in green. Age 4 and age 5 are golden brown and 2 small wing sprouts.

 

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.Spiders have a very short life cycle, high reproductive ability, create many generations in a year, so it is easy to break out into epidemics in a short time.

 

 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.

 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.

Currently in Vietnam, the cultivation of citrus trees is playing an important role in the country agricultural production. The benefits of citrus trees have made many farmers rich. However, wherever citrus trees are planted, fissured trunk cracking appears and causes damage. If any gardener is negligent or lacks attention to this disease, the tree will die, even the whole garden.

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