Category Archives: Diseases

Powdery Mildew Strikes Again

We have had a very cooler and wet spring and the powdery mildew is back with a vengeance. A day before our last good rain, I sprayed all of my crops with a mixture of Garrett Juice (2 tbsp per gallon), neem oil (almost 2 tbsp per gallon), and a tablespoon per gallon of ocean minerals.  After wards, the leaves had a nice rich green shine to them and the powdery mildew could not be seen.  I suspect that it was just hidden under the glossy finish.  After a few more days of very light sprinkles, Read more [...]

Squash Issues – Yellowing Leaves on Some Plants

In one of my raised beds, I have some squash plants - both summer yellow and zucchini - that are turning yellow.   In the neighboring bed some of the late planted squash appears to be stunted.  This is affecting the older leaves first.  The edges turn yellow and the leaf surface is splotched with yellow areas.  (This year I am growing some of my summer squash - both yellow and zucchini - in tomato cages to see if I can get a better control over the plants that would otherwise sprawl all over.) The Read more [...]

What Is The Problem With These Broccoli Leaves?

Some of my broccoli seedlings are developing spots on the leaves.  They are mostly a black spot and gray on the bottom of the leaf.  This problem is affecting the bottom most leaves first and sort of working its way up the plant.  This problem is affecting only some of the beds with broccoli planted in and not other beds. I can't treat the problem until I can correctly diagnosis it. This is the bottom of a broccoli leaf.  The leaf in the top right corner is a basil leaf.  The spots look Read more [...]

Yellowing Squash Leaves – Chlorosis?

I have about 2 summer squash plants in one bed that have leaves that are yellowing and decaying.  This is one summer squash, planted among other squash.  Only this one plant has this issue.  The older leaves turned yellow between the veins, then dried to whitish.  The edges curl up and the leaf finally dries up.  The new inner leaves are fine for a while.  I decided to cut these bad leaves off, leaving the hollow stems, just in case it is a virus.  You can see the plant to the right, it is Read more [...]

Anthracnose on Peppers

Some of my peppers appear to be afflicted with anthracnose, a fungal problem caused by Colletotrichum piperatum growth.  These are two peppers that never made it to maturity.  They were supposed to be Chocolate Bell peppers.  My Pimento peppers have also suffered from this problem.  I do not plan to save any Chocolate bell pepper seeds this year.  I have picked 2 Pimento peppers that were anthracnose free but I do not plan to save their seeds - I don't plan to grow pimentos again for a long Read more [...]

A Sample Pepper Harvest

The peppers were planted late, also, but they are producing fairly.  I learned that I can plant my peppers twice as dense in a raised bed next spring.  I had never planted them is a 5' x 16' raised bed before, so I wanted to leave them plenty of room to expand.  Lesson learned:  they don't need the room that I left them.  I had planted 3 to 4 plants across the 5' length, only about 10 rows along the 16' length.  Next spring I plan to start twice as much pepper seeds - that means 144 plants Read more [...]

Verigated Squash Leaves vs. Powdery Mildew

I received a comment questioning whether powdery mildew might actually be the natural coloring of certain squash leaves. I am creating this post in reply. This first picture if of a normal variegated squash leaf. Some squash plants, especially winter squash plants, have leaves with white areas. These white areas are usually at the junction of leaf vines. This next picture is of small powdery mildew spots - note the fuzzy look to the round splotches randomly located all over the leaf: This leaf Read more [...]

A Week of Rain Destroys a Squash Garden

This part of Texas is usually hot and dry during the summer.   This past week we had a very unusual event:  7 days of rain.    Every day we had some rain.   Some days we had over 2 inches and other days we had an eighth or a quarter inch of rain.  The total rain for the week was a bit over 6 inches.   You might think this is a good thing.  Not so - we had rain every day.   Along with high humidity, we had very little sunshine to dry the leaves off.   I went out to the garden a few Read more [...]

Overview – From July 10

This is the middle walkway between the 2 long rows of raised beds.  The beds are 5 feet wide and 16 feet long - to accommodate the 16' cattle panels.  I planned to plant climbing plants - mostly beans, squash and cucumbers - under the cattle panels on both sides of the bed and plant other things along the outer 2 feet of each long side.  I planted these squash so that they could grow down into the 4' aisle between the beds.  In the very front, left you can see a long vine growing along the outside Read more [...]

Squash and Zucchini

Because of out move, the entire garden was put in a month late. This has resulted in several issues.  Some of the plants didn't mature enough before the heat - and some plants are actually stunted.  I didn't get enough production out of the plants before the heat and drought hit.  You can see the powdery mildew on these leaves.  This zucchini is a Grey Zucchini - an heirloom that is one of my favorite zucchinis. This is an overview of a row of Patty Pan summer squash.  The plants are strong Read more [...]