Bacterial Wilt Disease On Chili Pepper
31/07/2021
Ph.D Nguyen Minh Tuyen Bacterial wilt disease is a fairly common disease for plants, especially in areas with high temperature and humidity conditions. Bacterial wilt is on chili pepper especially, popular in specialized growing areas, or areas specializing in growing vegetables such as tomato, eggplant, chili pepper, etc. for many years. Currently, chili wilt is still a difficult disease for growers. * Symptoms and effects: The disease can occur during most of the growth stages of the plant, but is more common in the flowering and fruiting stages. Plants that are still green naturally, wilt suddenly during the day, especially in the late afternoon period. At night and the first morning, the plants will be green again if the disease is still mild, but the plants will be in wilted death when the disease is severe. The disease can cause death of the plant, in clusters and spread if there are no timely and proper preventive measures.
* Pathogens and conditions of development: Wilt disease caused by Pseudomonas sp. cause. The disease develops in tropical chili growing areas. Soil with many remnants of previous crop, low humus and low-lying soil, high density planting, excess nitrogen fertilization, dense, moist trees, garden with many pests, especially those living in the soil such as white grub, striped flea beetles, crickets, nematodes,... Cause wounds on the roots, the disease is easy to develop. Poor water management also aggravates the disease. * Highly effective management measures: The principle is to apply a combination of measures: - Sanitize the remnants of the previous crop, when the disease is severe, it should be rotated with other crops. If the garden is often damaged, it is necessary to treat the soil before planting for the objects that damage the roots. - Raise a high bed so that the soil and garden are well ventilated. Do not make the soil too small, do not compact the soil when planting, because the soil is easy to be close and anaerobic after planting. - Basal application with manure (has been composted and thoroughly treated with Trichoderma) so that the soil is porous and the soil does not crack when dry, fertilize in a balanced and complete manner, avoiding excess nitrogen for healthy and disease-resistant plants. - Use disease-resistant varieties and healthy seedlings in reliable establishments to limit disease. - Plant with appropriate density, avoid dense to the garden ventilation. - When caring, avoid damaging and breaking the roots. - Water well, limit the garden too wet, or too dry. Do not let the water regime change suddenly, which can damage the roots. - When a diseased plant is detected, it should be uprooted and destroyed. - Before the flowering period, if the garden has ever suffered from bacterial wilt disease, it is necessary to spray and irrigate preventively with systemic and internally- absorbed products: Alpine 80WG or Saipan 2SL
|
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.
- Headquarters
- SAIGON PLANT PROTECTION JOINT STOCK COMPANY
- RQ 1, Nguyen Van Quy St., Tan Thuan Dong Ward, District 7, HCM City
- Tax code: 0300632232
- Tel: (028) 38 733 295 - 38 732 077
- Fax: (028) 38 733 003 - 38 733 391
- Website: www.spchcmc.vn - Email: info@spchcmc.vn
- SAIGON PLANT PROTECTION COMPANY
- SAIGON PLANT PROTECTION JOINT STOCK ENTERPRISE
- Lot C1-C3 Hiep Phuoc Industrial Park, Hiep Phuoc Commune, Nha Be District, HCM City
- Tel: (028) 3873 4089 - Fax: (028) 3873 4090
- Affiliated Unit
-
- Quick Links
- Home
- About us
- Career Opportunities