General Information

Directions for Use

Sprint 330 is a source of iron in a form readily available to plants. It can be applied as a soil application or as a foliar spray to correct iron deficiencies. As a soil application, Sprint 330 generally performs best where the pH is 6.0-7.5. Rates of application depend upon the severity of deficiency, but should be kept within the recommended range for each specific use. Unless specified differently, best results will be obtained when applications are made early in the plant growth cycle.

For Use in Wisconsin: Iron deficiency has not been observed on any field or vegetable crops in Wisconsin. Turfgrass, pin oak trees, and some ornamentals such as yews do show iron deficiency on soil with a very high pH (>7.5). This deficiency can be corrected by spraying the foliage with iron compounds such as ferrous sulfate or iron chelates or by decreasing

soil pH.

Soil Application: To be effective as a soil application, Sprint 330 must get into the root zone. It can be incorporated in the root zone during application or it can be moved into the root zone by rainfall or irrigation.

Sprint 330 can be applied as a drench, injected directly into the soil or banded. For plants grown in rows, soil applications are most effective when made as a band placed in the soil at planting time, or as a sidedressing shortly after plants emerge or after transplanting. Sprint 330 can be applied alone or in combination with dry or liquid fertilizers. To obtain uniform distribution, it can be mixed with inert materials such as sand or dry soil and uniformly distributed over the soil surface around the plants. When applied to the soil around trees, apply within the drip line and slightly incorporate into the soil or water in. Sprint 330 can be used at any time, but application in the spring or near planting time is preferred because: (1) spring rains will move it into the root zone, and (2) iron will be available during the early flush of growth. Injection into the irrigation water provides a good afterplanting method of application.

Foliar Application: Applications in water should be made as thorough cover sprays following the directions given below. Addition of up to 0.5% wetting agent (1 pt./25 gals. spray) to the solution may help insure uniform distribution. Sprint 330 is compatible with most pesticides and fertilizers. However, because of the large number of pesticides registered for pest control and the large number of fertilizers, a small test area should be sprayed to determine that no phytotoxicity or undesirable effects result from the combination spray before applying to large plant areas. Do not use in combination with methyl parathion.

To facilitate mixing, it is suggested that the required amount of Sprint 330 be added to a small amount of water and mixed until completely dissolved. The pre-mix solution can then be added, using agitation, to the final water or liquid fertilizer solution.

Limitations, Restrictions, and Exceptions

Types of Plants

Small Fruits (Blackberries, Blueberries, Boysenberries, Dewberries, Grapes, Loganberries, Raspberries, Strawberries, etc.)

As a band or sidedress application to the soil apply 1/2-1 lb./100 ft. of row early in the spring or when deficiency symptoms first appear.

For plants in containers, apply 1/4 tsp. per 8-inch pot, or 1/2 tsp. per 12-inch pot.