Will foliar feeding seedling cotton increase yield?
Work in this area indicates that foliar feeding seedling cotton, even stressed cotton, will not generally result in increased yields. The appearance of the cotton may be helped, but it is very rare that a yield response will occur from such a treatment.
Stress from being too wet or too cool is generally the problem, not necessarily a nutrient deficiency. The argument heard is that the plant can't take up nutrients, so foliar feeding will keep it going and "kick if off." If the plant is under so much stress that it cannot take up nutrients from the soil, what can it do with nutrients applied to its leaves?
If you are leaning toward foliar feeding seedling cotton, here are several things to consider.
A small seeding covers only a small area. The products sold for this purpose are low analysis to start with and are recommended at rates in the 1 quart per acre range. For example, consider a product that is about 9 percent nitrogen and weighs 12 pounds per gallon. If the recommendation is to apply 1 quart per acre broadcast, that comes to 0.99 pounds of nitrogen per gallon, or 0.2475 pounds per quart. You are putting out 0.2475 pounds of nitrogen per acre. Leaf area covers perhaps 1 percent or less of the surface acre. How much of the applied material contacts the plant? How much of the applied material gets into the plant?
If the plant is under stress, uptake of the material that actually gets on the leaf surface is greatly reduced. As you can see, not much of the product gets into the plant to do anything at all. If some nutrients do get into the leaf, and if the plant is under stress, what will it do with them? At that point, nutrient deficiency is not the problem. Fertilizer corrects nutrient deficiency, not other problems.
A noted physiologist and graduate student, in a nearby cotton state, did a study on foliar-feeding, stressed seedling cotton. Several treatments were involved, but none had any real positive effect. In fact, the best looking treatment, visually, was 10 gallons total volume per acre of water.
Cotton and corn acreage in Mississippi are more than 30% below March projections, while growers of soybeans and peanuts planted much more than initially forecasted.
STARKVILLE, Miss. -- Row crop growers in Mississippi used a relatively dry May to make up for planting time lost earlier in the spring due to wet weather and soggy fields.
As of May 24, planting progress for the state’s four major row crops was slightly behind their five-year averages but ahead of where it was at that time in 2019.
The Mississippi State University Extension Service has a new cotton specialist.
Brian Pieralisi was appointed to that role on April 1. He replaced Darrin Dodds, who took the helm of the university’s Department of Plant and Soil Sciences.
STARKVILLE, Miss. -- Weather always plays a role in the spring planting decisions of Mississippi row-crop producers, but the market impact of the ongoing COVID-19 pandemic is another variable they will have to consider in 2020.
STONEVILLE, Miss. -- Pathologists with Mississippi State University will be monitoring a relatively new plant disease in state cotton fields once the growing season is in full swing.
Cotton leafroll dwarf virus, or CLRDV, was first reported in Alabama in 2017. It is closely related to a cotton virus known to occur in South America. Historically, that virus has caused up to 80 percent yield losses in Brazilian cotton fields.