Jiangsu Agro Farm Chemical Co., Ltd

Why does glufosinate-ammonium sometimes have poor weed control effectiveness?

The effectiveness of glufosinate ammoniumand farmers' understanding of and mastery of the use of glufosinate are closely related. 
The following points are especially worth the attention of farmers when choosing to use glufosinate ammonium products:

1. The principle of glufosinate ammonium's herbicidal effect
Glufosinate ammonium is a broad-spectrum systemic herbicide. Glofosinate inhibits the activity of the enzyme that synthesizes glutamine, causing nitrogen metabolism disorder within the plant. Excess ammonia accumulates, causing chloroplast disintegration and destruction of plant photosynthesis, resulting in the herbicidal effect. After absorbing Glufosinate-ammonium, weeds gradually wither and die, and the effect can last for up to 30-45 days.

2. Crops suitable for Glufosinate ammonium
 Glufosinate Ammonium is mainly registered for use in non-cultivated land, papaya orchards, rubber plantations, tea gardens, fruit orchards, vegetable fields, etc. It has a good preventive effect on annual and perennial grasses, broad-leaved weeds, and sedges. Examples include Digitaria sanguinalis,Echinochloa crus-galli, Setaria viridis, Alopecurus aequalis, Avena fatua, Zea mays, Cynodon dactylon, Elymus spp., Echinochloa colona, Poa annua, Lolium multiflorum, Phragmites australis, Echinochloa crus-pavonis, Apera spica-venti, and Conyza canadensis.
 
3. Dosage of Glufosinate Ammonium
Using Glufosinate 200 g/L SL as an example, the actual operation experiments show that for ordinary weeds, 100ml-120ml per bucket of water  (15kg in volume) is sufficient. However, for some resistant weeds such as Phragmites australis and Leersia hexandra, the dosage needs to exceed 200ml per bucket of water to achieve good herbicidal effects, which results in a higher cost.
 
4. Can Glufosinate Ammonium be used for inter-row weeding after maize seedlings?
 Glufosinate Ammonium can be used for inter-row weeding after maize seedlings, but strict application techniques are required. When maize has about 10 leaves,  choose a sunny and windless day or a slightly windy day, use directional spraying with a hooded nozzle, and avoid drifting onto the maize. Although Glufosinate Ammonium has weak systemic activity, it still has some internal absorption, so care must be taken to prevent drifting and avoid crop damage.
 
5. What are the advantages of glufosinate ammonium?

Glufosinate Ammonium  has good safety and efficiency as it mainly kills weeds through contact, has weak systemic absorption, and is also suitable
for shallow- rooted crops such as grape and tea gardens. Glufosinate Ammonium  has a fast and long-lasting effect, with weeds turning yellow and
gradually dying within 2-3 days after application under normal weather conditions, and the effect can last for up to 30-45 days. Glufosinate does not
kill roots, which is beneficial for soil conservation and prevents the collapse of field ridges. Glufosinate ammonium  has a wider range of herbicidal
effects, even on some resistant weeds such as Conyza canadensis.
 
6.Why is the herbicidal effect of Glufosinate ammonium sometimes poor?
 
The herbicidal effect of glufosinate ammonium is mainly affected by three factors: humidity, temperature, and light.
Humidity: In dry weather, plants close their stomata, curl their leaves, and thicken their cuticles to reduce transpiration, 
which hinders the absorption of glufosinate ammonium and affects its effectiveness. When the air is humid, the waxy layer 
on the surface of the plant leaves remains moist, and the stomata open, which increases the absorption of glufosinate ammonium 
by plants and helps to improve its effectiveness.
 
Temperature: Under low-temperature conditions, the ability of glufosinate ammonium to penetrate the epidermis and cell membrane 
of plants decreases, thereby affecting the herbicidal effect. As the temperature rises, the herbicidal effect of glufosinate ammonium increases. 
It is recommended to use it at a temperature above 15 degrees Celsius, and it is not effective at low temperatures.
 
Light: When the light conditions are good, the transpiration of plants is strong, which helps to improve the effectiveness of glufosinate ammonium.
 
7.How to use Glufosinate ammonium more efficiently?
 
For weeding in uncultivated land, adding a certain amount of glyphoste can effectively reduce the rebound of weeds in the later stage. According to
experiments, adding 25g of 88% glyphosate soluble granules to one bucket of water (capacity 15kg) is effective. 
As for the specific dosage, it can be based on the local weed situation and tested on a small area first.
For situations where broad-leaved weeds are dominant, such as Portulaca oleracea, adding 20% carfentrazone-ethyl can further expand the
weed spectrum. SinceGlufosinate ammonium mainly relies on contact killing, it is necessary to spray it thoroughly and evenly, and organic
silicon penetrants can also be added to ensure that the weed leaves fully contact and absorb the glufosinate ammonium, thereby achieving
better weed control.

When diluting glufosinate ammonium, do not use muddy river water to avoid reducing its effectiveness.
As a good product, how to use glufosinate ammonium correctly and improve its performance more efficiently is crucial in the promotion process, 
and technical promotion deserves attention.

Contact Us

    Name: Kim Gong

    Tel: +86-15150222860 , +86-18015677881

    E-mail: [email protected]

    Skype: kim.gong

    QQ: 326296678

    WeChat: +8615150222860

    Whatsapp: +8615150222860

    Add: No.268, Jingang Road, Zhangjiagang Free Trade Zone, Zhangjiagang City, Jiangsu Province, China

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