Logran 750

Logran 750

1 Trade name	Manufacturer	Form
4FARMERS TRIASULFURON 750 WG SELECTIVE HERBICIDE	4 FARMERS PTY LTD	WG
ALLFIRE TRIASULFURON HERBICIDE	AGVANTAGE PTY LTD	WG
AW TRIASULFURON 750 HERBICIDE	AGRI WEST PTY LIMITED	WG
CHEMAG MANDATE 750 WG SELECTIVE HERBICIDE	IMTRADE AUSTRALIA PTY LTD	WG
CHEMFORCE TRIASULFURON 750WG HERBICIDE	FRANK VANDERKLEY & PAUL RICHARDS T/A CHEMFORCE AUSTRALIA	WG
CROWN TRIASULFURON 750 WG	CORONA INDUSTRIES PTY LTD	WG
DUPONT TRISURE HERBICIDE	DU PONT (AUSTRALIA) LTD	WG
ECOGRAN 750 WG SELECTIVE HERBICIDE	PACIFIC PHARMACEUTICALS PTY LTD T/A CHEMTECH AUSTRALIA	WG
EPSILON 750 HERBICIDE	AGVANTAGE PTY LTD	WG
FARMOZ LONESTAR 750WG SELECTIVE HERBICIDE	FARMOZ PTY LIMITED	WG
GENEREX TRIASULFURON 750 WG HERBICIDE	GENEREX AUSTRALIA PTY LIMITED	WG
GENFARM TRIASULFURON 750 WG SELECTIVE HERBICIDE	GENFARM CROP PROTECTION PTY LTD	WG
KENSO AGCARE KEN-GRAN 750 WG SELECTIVE HERBICIDE	KENSO CORPORATION (M) SDN BHD	WG
LOGRAN 750 WG SELECTIVE HERBICIDE	SYNGENTA CROP PROTECTION PTY LIMITED	WG
NUGRAN SELECTIVE HERBICIDE	NUFARM AUSTRALIA LIMITED	WG
OSPRAY TRIASULFURON 750 WG HERBICIDE	OSPRAY PTY LTD	WG
RIVAL 750 WG SELECTIVE HERBICIDE	CONQUEST AGROCHEMICALS PTY LTD	WG
RYGEL TRIASULFURON 750 WG HERBICIDE	RYGEL AUSTRALIA PTY LTD	WG
SIPGRAN 750 WG SELECTIVE HERBICIDE	SIPCAM PACIFIC AUSTRALIA PTY LTD	WG
SMART TRIASULFURON 750 WG HERBICIDE	CROP SMART PTY LTD	WG
SUMMIT TRIASULFURON 750WG HERBICIDE	SIPCAM PACIFIC AUSTRALIA PTY LTD	WG
TITAN TRIASULFURON 750 WG HERBICIDE	TITAN AG PTY LTD	WG
TRYON 750 SELECTIVE HERBICIDE	GROW CHOICE PTY LIMITED	WG
UNITED FARMERS UNIGRAN SELECTIVE HERBICIDE	UNITED FARMERS CO-OPERATIVE COMPANY LTD	WG
WHITESTAR TRIASULFURON 750 WG HERBICIDE	AGRICULTURAL PRODUCT SERVICES PTY LTD	WG

3 ACTIVE INGREDIENTS: Triasulfuron 750 g/kg

4 CHEMICAL GROUP: B.

Sulfonylurea

FORMULATION: Water dispersible granule.

5 RELATED HERBICIDES: Ally, Glean, Siege, Oust.

6 GENERAL DESCRIPTION:

Logran, being from the sulfonylurea group, is 100 times more active than traditional herbicides so very low rates are used in the field.

It is a selective and translocated herbicide that is absorbed through the leaves and roots. Its main uses are for the control of a large variety of grass and broad-leaved weeds as pre-emergence application on wheat or as a post-emergence application on wheat, barley and oat crops. It is of low toxicity to mammals, birds and fish. Triasulfuron acts on the ALS enzyme in plants which is not present in animals and this is the main reason for its low toxicity. Triasulfuron presents little hazard to the environment because it is used at low rates and degrades relatively quickly in most field situations. Plants resistant to triasulfuron have developed and are expected after repeated use.

7 APPLICATION METHODS AND TIPS:

Triasulfuron is usually mixed with 30-100 l water per hectare and broadcast through hydraulic nozzles. It can be applied in ultra low volumes of carrier.

Surfactants and spray oils usually improve weed control.

Acidifiers may increase triasulfuron absorption, especially on waxy plants.

Young, actively growing weeds are most sensitive and crops most tolerant of triasulfuron. Under cold, wet or stressful conditions the weeds become more tolerant and the crop less tolerant of sulfonylurea herbicides.

Rain within a few hours of application may reduce the effectiveness of post-emergence applications. Leaching rains reduce the effectiveness of pre-emergence applications.

11 COMPATIBILITY:

Non ionic surfactants and spraying oils increase the absorption and herbicidal activity.

Triasulfuron is antagonistic with diclofop and other grass herbicides. The antagonism is variable and appears to depend on the ratio of the herbicides.

Triasulfuron applied pre emergence reduces the effectiveness of most post emergent wild oat herbicides. Puma S appears to be the least affected. Achieve loses 6-8% of its wild oat control.

Triasulfuron forms stable metal and ammonium salts so it is incompatible with most trace elements and ammonium sulphate. Hard or salty water may reduce its effectiveness.

14 HERBICIDE RESISTANCE:

Plant populations tolerant to triasulfuron are expected to occur naturally after repeated use. Tolerant crops can be developed.

15 REPLANTING INTERVALS:

Crop

Time

16 WITHHOLDING PERIODS:

Crop	Type	Time
All	Harvest
All	Grazing

17 RE-ENTRY PERIOD:

18 PROTECTIVE CLOTHING:

19 SOIL:

20 MODE OF ACTION:

Triasulfuron stops cell division very quickly by its action on the ALS enzyme. Secondary effects on photosynthesis, respiration and ethylene production produce the symptoms of yellowing and reddening of grasses and leaf drop in broad-leaved weeds.

Species tolerant to triasulfuron such as the cereals degrade it more quickly than do sensitive plants. Degradation products are non toxic and herbicidally inactive. Herbicide resistance appears to be due to plants with a less sensitive ALS enzyme. The growth of seedlings may be stimulated at low dose rates.

It does not normally affect seed germination.

Uptake and translocation:

Most of the triasulfuron applied to leaves is absorbed. Small amounts move out of the leaf to other shoots and even less to the roots. Most is translocated in the phloem. Absorption by roots from the soil solution is not as efficient but this is compensated for by better movement up to the leaves.

Physiological effects:

Residual Life and Breakdown:

21 SELECTIVITY:

Crop tolerance:

Varietal sensitivities:

Wheat - Amery, Brookton, Calingiri and Kulin are sensitive to pre em applications and post em applications up to the 2 tiller stage.

Effect on Clover Species:

Effect on Medic Species:

Effect on Lucerne:

Effect on Native Plants:

22 DISEASE AND INSECT EFFECTS:

23 PLANT SYMPTOMS:

Growth stops soon after application. About a week later plants will start to yellow or redden. In broad-leaved weeds this may be an intervenal yellowing. Annual weeds are usually dead within 4 weeks of spraying. Under cold and wet conditions they may remain alive as severely stunted plants with few roots and die from water stress in spring. Triasulfuron has little effect on germination and weeds may emerge and grow for a week or two before dying.

SECONDARY EFFECTS:

Triasulfuron does not affect the microbes associated with N fixation in legumes.

Triasulfuron and residues in the soil from previous applications may make the crop more susceptible to Take-All, CCN, Rhizoctonia and zinc, copper and manganese deficiency (Hollaway, 1997).

It has no impact on N or P nutrition of cereals (Wilhelm et al, 1995).

24 TOXICITY:

Mammalian toxicity - low.

Acute oral LD50 - >4000 mg/kg

Acute dermal LD50 - >3000 mg/kg (rabbit).

Skin - not irritating.

Eye - mildly irritating.

Vapour inhalation - LC50 - >5 mg/L air (rat).

Chronic oral toxicity NOEL - 100 ppm for two years.

Not mutagenic or teratogenic (i.e. does not cause cancer or reproductive problems).

Birds - low toxicity.

Fish - low toxicity LC50 >200 ppm.

Invertebrates - low toxicity.

Bees - low toxicity.

25 TOXICITY SYMPTOMS:

Triasulfuron does not usually evoke any symptoms in animals.

The main enzyme (ALS) that is attacked in plants does not occur in animals.

27 ENVIRONMENTAL FATE:

Triasulfuron has a half life in soil of about 2 weeks -2 months. Its half life is much longer in soils with high pH (up to 9 months). At a soil pH of less than 7 it is broken down by hydrolysis and microbial degradation. At a pH of more than 8 there is little hydrolysis and only microbial breakdown. Breakdown is most rapid in warm, moist, acid and light textured soils with high organic matter. Little is naturally degraded due to exposure to sunlight and volatilisation. Triasulfuron has an EPA classification for soil mobility that ranges from intermediate mobility to very mobile depending on the soil type. Mobility usually increases with increasing soil pH and decreasing organic matter. It will move up, down and sideways in the soil profile depending on the water flow. However, it is not expected to cause ground water contamination problems due to its relatively rapid degradation in plants and soils, low use rates and low toxicity.

Some crops should not be planted for many months after triasulfuron application. This is because they are sensitive to extremely low levels of triasulfuron and not because of high levels of persistence of the herbicide in the soil.

Triasulfuron does not accumulate in the milk or tissues of animals. Most is excreted intact in the urine of monogastric animals or as a conjugate in ruminants.

Replanting Intervals:

Some crops should not be planted for many months after triasulfuron application. This is because they are sensitive to extremely low levels of triasulfuron and not because of high levels of persistence of the herbicide in the soil. Lentils, Medic, sugar beet and onions are very sensitive to triasulfuron. Canola, Setaria Millet, Lucerne, sunflower, potatoes, mustard corn and flax are sensitive. Peas, Beans, Mung Beans, Pearl Millet, Ryegrass, Sorghum, Cotton, Soybeans, Safflower, Bluegrass and Guar are moderately sensitive and Wheat, Triticale, Rye, Barley, Oats and Black Nightshade are tolerant.

On Wimmera grey clays triasulfuron at 30 g Logran/ha reduced the growth of canola, medic and lentils 12 months after application and the growth of lentils 2 years after application (Hollaway, 1997).

31 PROPERTIES:

Vapour Pressure at 25 C. - Very low.

Dissociation constant - weak acid.

Solubility - 1500 mg/L in water.

It has a leaching index of 25-30. (for comparison, trifluralin is 0-1 and chlorsulfuron is 25-30).

It has a half life 30 days at 20 degrees and 50% WHC in Mohlin soil.

TRIASULFURON

2.	Concentration of Active Constituent : 750g/kg
3.	Formulation : Water Dispersible Granule
4.	Poison Schedule : Exempt from scheduling.
5.	Trade name : Logran 714 WG - Novartis
6.	Product Colour : Brown granules.
7.	Product Flammability : Non-flammable.
8.	Dangerous Goods Class : Not classed as a dangerous good for transport.
9.	Shelf Life : In excess of 2 years.

(When stored under ideal conditions- refer Page 4)

10.	Mixtures Compatibility : Avadex BW (tri-allate) Roundup CT (glyphosate) Spray.Seed (paraquat + diquat)
11.	Registered Crop(s) : Wheat.
12.	Effect of Soil Texture on Herbicide : Application should not be made to ridged or excessively cloddy soil. Crop damage can occur on light soils.
13.	Effect of Soil pH on Herbicide: Varies carryover life. At 20oC and pH4.5 half life is 15 - 30 days. This means if sprayed too early there will be insufficient herbicide for effective early weed control.
14.	Effect of Soil Organic Matter on Herbicide : Not critical on application rate.
15.	Mode of Action : Leaf and root absorption, Pre-emergent.
16.	Application Timing : Apply to bare moist soil prior to or at sowing.
17.	Rate Variations : 30 to 35 g/ha.
18.	Rates Selection : Lower rate on sandy clay loams with pH greater than 8.5. Higher rate 35 g/ha for annual ryegrass, paradoxa grass, soursob, Doublegee, capeweed, wireweed, and wild radish.
19.	Crop Damage (Crop Tolerance) : Excellent tolerance demonstrated in trials on more than 70 wheat varieties.
20.	Effect on Crop : Slight retardation on early crop growth may be observed when crops are planted in sandy soils with pH > 8.5.
21.	Effect on Legume Species : Do NOT apply to crops undersown with legumes.
22.	Soil Moisture at Application :

DRY - Less activity on the weeds.

MOIST - Ideal conditions.

WATERLOGGED - Damage may occur in light soils after heavy rain.

23.	Frost Effects : Not applicable.
24.	Frost Free Days Required After Application : Not applicable.
25.	Effect of Application Water Quality on Herbicide :

Saline Water - Not critical.

Soil Colloids - Not critical.

In acid water and in warm weather, Logran can breakdown at rates of up to 10% a day.

26.	Recommended Water Volume : 30 - 100 L/ha boom.
27.	Nozzle Type : Flat fan or hollow cone.
28.	Recommended Nozzle Pressure : Follow manufacturer's recommendations.
29.	Recommended Filter Size :
30.	Recommended Wetter : None.
31.	Other Additives : Uptake is not compatible with Logran. Avadex BW where wild oats are anticipated as a problem.
32.	Rain Fastness : Not applicable.
33.	Time Interval Before Effect is Noticed : 7 - 21 days depending on growing conditions, warm and moist conditions favour the activity.
34.	Weed Symptoms : Youngest plant tissue is first to show increasing chlorosis and anthocyanin (purpling). Necrosis develops later.
35.	Effect of Herbicide/Disease Interaction on Crop : Some crop yellowing may occur where Rhizoctonia, Take-all and cereal cyst nematode are already present.
36.	Withholding Period : 49 days.
37.	Plant-Back Period : Wheat, Barley, Oats, Triticale, and Cereal Rye - following season. For other crops could be up to 24 months depending on soil pH.
38.	Spray Tank Clean-Up : Residues of Logran may cause damage to crops other than wheat if these crops are sprayed with contaminated equipment. Clean with household bleach solution (4% chlorine), refer label.
39.	Other Comments : Apply before sowing to a moist seed bed without clods or ridges. Incorporation by sowing improves the reliability of the weed control results, use narrow low profile 10 cm combine points to ensure even mixing of soil. Poor incorporation will result in uneven weed control or 'striping' of weeds. High temperature and moisture increase the rate of degradation. Rainfall following application, preferably within 7 - 10 days, is needed to 'activate' Logran and move it into the weed root zone.

Numbered data from "Crop Herbicide Information"

courtesy of A.J. Chambers, Vic. Dept of Food & Agric.

33 REFERENCES:

Hollaway, K. (1997). Australian Grain. April-May 1997, 11-14.

Wilhelm, N., Ramsey, W and Neate, S. (1995) Australian Grain. Western Focus. October-November. vii.

Acknowledgments:

Collated by HerbiGuide. For more information see www.herbiguide.com.au or phone 08 98444064.