General Information


Apply Lightning only on selected field corn hybrids (CLEARFIELD corn) warranted by the seed company to possess resistance/tolerance to direct application of certain imidazolinone herbicides. DO NOT apply Lightning to corn hybrids that lack resistance/tolerance to imidazolinone herbicides. Contact your seed supplier, chemical dealer or BASF to obtain information regarding CLEARFIELD corn hybrids.

When applied as directed at the broadcast rate of 1.28 ounces per acre, Lightning will control or reduce competition from the weeds listed in Table 1 of the label.

The number under Maximum Leaf Stage indicates the MAXIMUM number of leaves at which weeds should be sprayed postemergence.

DO NOT count cotyledon leaves when determining weed stage of growth.

Mode of Action

Lightning herbicide kills weeds by root and/or foliar uptake and rapid translocation to the growing points. Adequate soil moisture is important for optimum Lightning activity. When adequate soil moisture is present, Lightning will provide residual control of susceptible germinating weeds; activity on established weeds will depend on the weed species and the location of its root system in the soil.

Lightning is active against many broadleaf and grass weed species. For long-term weed management, use two herbicides with different modes of action to reduce the potential for weed resistance.

Crop Tolerance

Crops growing under stressful environmental conditions can exhibit various injury symptoms which may be more pronounced if herbicides are used. Corn plants treated with Lightning may exhibit yellowing on new growth. Such effects occur infrequently and are temporary. Normal growth and appearance should resume within 1 to 2 weeks.

Use of Lightning in accordance with label directions is expected to result in normal growth of rotational crops in most situations; however, various environmental and agronomic factors make it impossible to eliminate all risks associated with the use of this product and, therefore, rotational crop injury is always possible. Under some conditions (such as heavy texture soil, high organic matter, low pH or low rainfall) Lightning may cause injury to subsequent planted crops. See the ROTATIONAL CROPS section of the label for rotation intervals to sensitive crops.


For maximum weed control, cultivate 7-10 days following Lightning application. This timely cultivation will enhance residual weed control, especially under dry conditions.

Ground Application Methods and Equipment:

Uniformly apply with properly calibrated ground equipment in 10 or more gallons of water per acre. A spray pressure of 20 to 40 psi is recommended. DO NOT apply when wind velocity is greater than 10 mph. (See SENSITIVE CROP PRECAUTIONS section for application guidelines near sensitive crops.)

To ensure thorough coverage a minimum of 10 gallons of water per acre is recommended when applying Lightning to minimum till or no-till CLEARFIELD corn. Use higher gallonage for fields with dense vegetation or heavy crop residues. Flat-fan nozzles tips are recommended for postemergence applications.

Avoid overlaps when spraying.

Aerial Application Methods and Equipment:

Uniformly apply with properly calibrated aerial equipment in 5 or more gallons of water per acre. Addition of a non-ionic surfactant AND fertilizer solution are required for optimum weed control; apply a non-ionic surfactant at the rate of 1 quart per 100 gallon of spray solution OR a crop oil concentrate at the rate of 1.25 gallon per 100 gallon of spray solution, AND a liquid fertilizer at the rate of 1.25 gallon per 100 gallon of spray solution.

To avoid injury to sensitive crops from drift, aerial applicators must adhere to the following SPECIAL AERIAL USE DIRECTIONS AND PRECAUTIONS.

Only one application of Lightning may be made during the growing season.

- If replanting is necessary in a field previously treated with Lightning, the field may be replanted only to CLEARFIELD corn. Rework the soil no deeper than the treated zone. DO NOT apply a second treatment of Lightning. In the event of a crop loss due to weather, CLEARFIELD corn seed hybrids can be replanted following an application of Lightning. If Lightning was tank-mixed with other herbicides, the label restrictions for these herbicides must also be followed.

- DO NOT apply Lightning within 45 days of corn harvest (silage, fodder, or grain).

- DO NOT graze or feed treated corn forage, silage, fodder, or grain for at least 45 days after an application of Lightning.

- More restrictive crop growth stage limitations of tankmix partners must be followed.

- DO NOT apply through any type of irrigation system.

- DO NOT apply in a greenhouse.

- Not for use in California.

- In New York - Not for sale or use on Long Island.

Lightning can be applied postemergence (including spike stage) on CLEARFIELD corn hybrids.

See label for the additional information for cotton planting following Lightning herbicide applications.

Limitations, Restrictions, and Exceptions


Additional applications of other broadleaf herbicides may be necessary to control subsequent flushes of sicklepod.

Lightning is effective in controlling annual weeds in conservation tillage as well as in conventional production systems. Apply Lightning as a postemergence treatment to CLEARFIELD corn when crop and weeds are actively growing. For optimal weed control, apply Lightning before weeds exceed labeled height.

At this broadcast rate, one bottle of Lightning will treat 10.0 acres of CLEARFIELD corn.

Lightning can be applied postemergence (including spike stage) on CLEARFIELD corn hybrids.

- Lightning must be applied with drop nozzles (i.e. post-directed onto weeds) under the following conditions: if the corn is greater than 20 inches tall or corn has 6 or more leaf collars (V6), whichever is the more restrictive, or if the crop canopy prevents adequate weed coverage.

Delaying a Lightning application for 48 hours from the time temperatures increase above 50° F, (i.e., after air temperatures have remained below 50° F for 10 or more hours) will improve weed control and reduce the potential for crop response. Unusually cool temperatures (50° F or less) reduce photosynthesis and transpiration and thus reduce the uptake and translocation (and effectiveness) of Lightning in weeds.

Lightning should be applied a minimum of one hour before rainfall or overhead irrigation.

Restricted Entry Interval

12 hours