As we have known, there are normally many groups of damaging weeds in the rice field, they are categorized into 03 groups: grasses (Echinochloa sp, Leptochloa chinenis), sedges (Cyperus difformis, Fimbristylis miliacea), broadleaved weeds (Monochoria vaginalis, Ludwigia octovalvis, Marsilea minuta…) So how to do, to prevent well all above-said weeds, especially Leptochloa chinensis at the same time but it is still safe for rice plant. We would like to introduce 02 new herbicides of SaiGon Plant Protection Company:
1. PYANCHOR 3EC :
is broad spectrum herbicide that controls 03 groups of above-said weeds on the rice field (to use to control weed on the direct seeded or transplanted rice field), especially product has very strong effectiveness against co gao or to be called Echinochloa sp PYANCHOR 3EC is a post emergence herbicide, timing application of PYANCHOR 3EC from 8 to 20 days after sowing, transplanting . Weed has about from 3 to 5 leaves by this time (in Vinh Long province, in so many cases that fields have a lot of Echinochloa sp, peasants use PYANCHOR 3EC until 20 to 25 days after sowing)
However; due to climate of winter-spring season getting cold in this year make weeds grow slowly, weed leaves are till small, they get very difficult to contact with product so the translocation of product inside of the weed is slow make poor effectiveness. As for this case , peasants should base on the number of weed leaves for spraying product
Reality, after spraying PYANCHOR 3EC( within 24 hrs), weed stopped growing and no longer compete fertilizer withrice plant. In addition, PYANCHOR 3EC has striking advantages so peasants like it:
§ · Product is very safe for rice plant, until now there is no any case of poisoning with PYANCHOR 3EC
§ · It can be used on the field s that control as well as not control water
§ · Product absorbing time is very fast, after spraying 24 hrs, product is absorbed by weed leaf. If it rains 4hrs later, it need not to spray again
§ · To spray evenly, spray in correct technique, it is necessary to spray PYANCHOR 3EC once, it can control weed throughout the season and it needs not to use further any other herbicides
Depending on the kinds and density of weeds on the field in order to use dose properly. In case the field has 03 groups of weeds ( Echinochloa sp, Cyperus difformis, Fimbristylis miliacea, Monochoria vaginalis, Ludwigia octovalvis, Marsilea minuta etc…) recommended dose is 0.8 litre/ha, dilute 20 ml/8 litre, spray 4 tanks for 1000 m2 or dilute 40 ml/ 16 litre, spray 02 tanks for 1,000m2. Besides, field has much leptochloa chinensis (this weed is difficult to control, it often grows in high place on the field) peasants should spray early about from 6 to 10 days after sowing (by this phase weed seeds have grown on the field wholly ). Dose in use 1 litre/ha, dilute 25ml/8 litre, to spray 4 tanks for 1,000m2 or dilute 50 ml/8 litre to spray 02 tanks for 1,000m2.
To take note: Because product is mainly absorbed through weed leaves, peasants need to sufficiently spray recommended amount of product ( 04 tanks of 8 litre for 1,000m2 or 02 tanks of 16 litre/1,000m2) and it needs a full spray so that product can contact with weed leaves evenly
When spraying product, the field needs sufficient humidity, if it has water, peasants should drain water out then spray so that product can contact with weed leaves evenly
After spraying from 1 to 3 days, to put water into the field and continuously keep it from 3 to 5 days ( the symptom after spraying product 3 days, weed begins turning yellow and some 5 to 7 days later, weed dies completely.
2. PYAN PLUS 6EC:
PYANPLUS 6EC is formulated with two active ingredients Pyribenzoxim and Fenoxapprop-P-ethyl ( a.i specifically controls Leptochloa chinensis ) according to proper ratio so that it can control both 3 groups of weeds on the field and Leptochloa chinensis but ensure safety and without phytotoxicity on rice plant as we usually see when using herbicide with Fenoxaprop -P-ethyl to be ai
PYANPLUS 6EC is a selective herbicide( killing weed, safety for plant ), broadspectrum. According to many peasants, to spray PYANPLUS 6EC in the right technique, just one spraying can control Leptochloa chinensis and groups of common weeds on the field througout the season and it needs not to use further any other herbicides )
Based on our study and peasants’ experiences, the best application timing of PYANPLUS 6EC from 10 to 14 days after sowing. Because rice plant is relatively big at this time , weeds grew all and young weeds ( 2-4 leaves ) therefore, weeding is very easy. Weeding will be safe for rice plant at this time, weeds die easily so they no longer compete fertilizer, water with rice plant. In the winter-spring season, in the year which weather becomes very cold smaller than 18 oC, the plant such as weed, rice plant; growth, germination becomes tardy so peasants can spray later than from 1 to 2 days ( about 11 -12 after sowing ) in order to get weeding effectiveness better.
Dose in use: 0.5 litre/ ha ( dilute 12 ml/8 litre, to spray 04 tanks for 1,000 m2 , or dilute 25 ml/16 litre, spray 02 tanks for 1,000 m2)
To take note: When using Pyanplus 6EC, peasants should avoid overlapping spray. As for northern provinces if diurnal temperature is too low smaller than 15 oC, it should not use herbicide, just use of herbicide when the weather getting warm again so weeding effectiveness will be high
SPC - Master Huynh Kim Ngoc