Again with the powdery mildew

The title really says it all.

This isnt my first time having Powdery Mildew back in 2009 and really 2010 it attacked me. So this just means that every year that i have attempted to grow something in the Cucurbitaceae plant family, that it has died from powdery mildew. This goes for all of my cucumbers, squashes (including pumpkins), and melons (including watermelons).

So how do i kill it and how do i prevent it?

My understanding is that once you have it you can not get rid of it.

I have read in some places that its due to hot temperatures and the leaves getting wet. this doenst really make sense to me cause its always going to be hot. its the summer! and its going to ran. So if this is the case every farmer is doomed.

Things that we have tried to do: Baking Soda, Neem and cutting away the infected leaves.


 
This is what GardenGuides.com has to say about managing powdery mildew.
Management

• In most cases, good cultural practices will adequately control powdery mildew:
• Select powdery mildew resistant varieties. This is particularly true of roses. For lawns, shade tolerant grasses such as creeping red fescue can be planted.
• Plant in full sunlight in a well-drained area.  
• Do not crowd plants. Air flow and ventilation will discourage mildew growth.
• Powdery mildew thrives where high rates of nitrogen have been used. High nitrogen promotes tender leaf formation, causing dense stands that are more susceptible to infections. Adequately fertilize but avoid stimulating succulent growth. Organic fertilizers or slow-release formulations of lawn fertilizers are good choices.
• Prune infected plants to get rid of infected parts and increase airflow. If the infestations are severe, remove and destroy the plants that are infected.
• Disinfect your pruning tool in a bleach solution of one part household bleach to four parts water after each cut.
• Watering plants in the morning gives the plants the rest of the day to dry off, discouraging establishment of diseases, including powdery mildew.

What do you know or think about this?  any information will be much appreciated.

Powdery Mildew - The end to Melons, Squash and Cucumbers

We had different varieties of melons, squash and cucumbers growing. The we started noticing this white powder on the leaves. Before we knew it, it was on ALL of the leaves and the stalks. Then what was once a beautiful green was now turning a limp yellow with crust brown edges.

Before:

After:
(although this isnt really after. This is during. After is just a picture of dead brown)

I can not confirm that any of the following statements are fact.
We read that it (the powdery mildew) is from the south. When we had hot days and rain Or when you get your leaves wet, it helps to spread this.

We couldn't find a sure fire way of curing it, stopping it, or preventing it.
Some remedies were to us 1 part baking soda and 9 parts water.
another one was a milk and water mixture.

We did use the baking soda remedy and it did seem to slow it down. Some times it seemed to reverse it but i think we were just seeing what we were hoping for.

In the end it brought all those infect to a short life with a sudden end. :(

If you have any info or insight on this I would love to hear it.