I also suspected that would be the case. I know I did a AH map of North America in the 1900s with an independent CSA which got both (and more) as the nothern tier of Mexican states were some of the best cotton producing states in Mexico (although there are a couple such as Sinaloa and others to the immediate south of Sonora which produce more cotton).
If the CSA were to gain any of these states then the boll weevil infestation would hit the independent CSA sooner by virtue of the weevils appearing in those newly gained states first. (so even if the TL of boll weevil migration hasn't changed the fact that the CSA now controls territory that the boll weevil infested earlier means that it will be affected earlier. Plus the transportation of cotton from those states to ports in the traditional CSA states would probably have hastened the arrival of the boll weevil in the original CSA by a matter of weeks or maybe months.
My view is that the boll weevil would have so devastated cotton production that it would lead to a revolutionary situation in the South (not revolutionary as in the people rise up and otherthrow the elected government but revolutionary as it would lead to a nearly complete change in society). Cotton production would take a big hit (and indeed in the prices and production data I found from various sources it is quite evident that the peak year of cotton in OTL in the South was 1915 (i.e. before the boll weevil). Thereafter it has been on a downward trajectory and never looked back. So we would have had plummetting cotton prices and attempts at diversification but even so some farmers will want to take up their roots and simply leave, maybe for the Union in some cases but maybe also for the cities of the Confederacy. There would then be an excess of slaves and slave prices would probably fall very quickly. In that scenario we could see more slaves being bought or leased for industrial businesses (like mining) - and before anyone says "it can't happen" I recommend you read "Slavery By Another Name" by Douglas Blackmon; slaves were bought and leased by factories in OTL and there is no reason to believe the practice wouldn't continue. Industrial businesses and smaller, diversified farms won't need quite as many slaves so slaves will still be cheaper. This means that even lower class whites could afford to buy them (probably for the first time in the lives of many) but slaves might become so cheap that a few might even be able to purchase their own freedom and in isolated cases across the South farmers may just abandon their slaves and they become free by default.
In that environment we could see new laws put in place to keep free blacks as second-class residents of the South and efforts launched to ship off "excess blacks" to places like Haiti and/or Africa (so Liberia could experience a wave of new migrants under this scenario, thereby increasing the proportion of the population that is "Americo-Liberian").
Very, very good.
I tend to think the same, but more along the lines of what robertp6165 thought, that a situation like this is going to pretty much going to be the death knell of slavery as the Confederates knew it. From a situation like this the CS will have to industrialize, not government funded or anything mind you, but instead from private investors and business entrepeneurs.
Without a doubt because of a CS victory like this the shock and hatred that brewed during Reconstruction and blossomed into Jim Crow never happened, much of the CSA's industrial base that popped up during the war is still going to be around and in good shape because the Union never got to it.
Add to it, that Blacks in the CSA (albeit gradually emmancipated) on a state-by-state level over the span of say 30-40 years from the late 1880s-1910's/1920's will be largely put into peonage, they'll be sharecroppers with no voting rights much like OTL, but no segregation model like OTL.
The POD to TTL is sometime in September 1862, anything that prevents Antietam and allows Lee to bloodynose the AotP, which also allows the Army of Mississippi/Tennessee/Kentucky to pull off a successful Heartland Offensive the following month. And probably get Arizona in a plebecite and the Indian Territory, but nothing else from the Union.
Welcome to the board.