Knowledgebase

what is happening to my tomatoes? #210009

Asked August 31, 2014, 7:56 PM EDT

First year gardening in Wyoming and so far so good, but whatever is happening to my tomatoes I have never seen before. For the most part the plants are healthy, taller than me, and quite bushy. But most of my tomatoes are very splotchy, squishy before they turn red, and have light colored spots all over them. The light color goes beneath the skin and appears to remain white in those spots (won't turn red) and if left will open up and leave a nasty mold substance all over in the seed cavity. The affected fruit feels very light in weight. The affected fruit also doesn't taste appealing. I have never seen this before!

Laramie County Wyoming

Expert Response

I believe there are several things going on with your tomatoes. One; from the clue you gave me on their height, I believe you are using a fertilizer for your tomatoes that has too much nitrogen (the first number). A good tomato fertilizer has relative low nitrogen, under 10%, and has micro-nutrients to help support good flavor, color and internal fruit growth. The internal problems you are seeing is “internal blossom rot” which is caused by several problems one being too much nitrogen fertilizer, soil going from moist to dry and being dry too long. If you added any manure to the soil it can also contribute to this problem by raising the soil salinity level. Wyoming soils are typically high in soil calcium so I don’t believe adding any to your soil will help. The white-ish spots look like hail damage (we had 6 hail events this summer). Some tomato growing tips: do not use overhead watering as that can cause various disease issues, rather use soaker hose or drip tape on the ground and water only at the roots. Tomatoes like their soil hot use black plastic on the ground to achieve this. Use a fertilizer with numbers like: 5-10-5, 8-10-8 or 5-8-4, importantly low nitrogen is best. Do not use manure based compost or manures (cow/sheep in a bag) as the salt levels are damagingly high. Do use peat moss, leaves or kitchen waste. Do not lime the soil. I hope all this helps you have a better growing season next year.
Catherine Wissner Replied September 03, 2014, 6:28 PM EDT
This is not hail damage. I should have stated we did not receive the storms. We always get tall tomato plants...because we grow up instead of out like greenhouses tend to Do.we did find the problem. It is stink bugs. The bites allow bacteria to enter. The crop is pretty much a total loss. Thank you for your help though.
The Question Asker Replied September 03, 2014, 6:33 PM EDT
always helps to have all the information. :)
Catherine Wissner Replied September 04, 2014, 6:05 PM EDT
Well we noticed what appeared to be a relative of stink bugs having hatched out in huge numbers in the green beans but we opted not to spray the offenders as we were harvesting the beans. Although I see very few actually on the tomatoes, all the damage points to them. They are very light green in color making them hard to spot on the tomatoes (blend right in). Unfortunately we live right along the interstate and there are very tall weeds inches away from parts of the garden (just right on the other side of the fence). Do you have any thoughts on how to avoid/manage stink bugs in a home garden for when we start up again next year?
The Question Asker Replied September 04, 2014, 6:09 PM EDT
Trap crops come to mind as Stink bugs are known to be attracted to the color yellow; mustard, millet, buckwheat, sorghum, sunflowers, and yellow mums are good trap crops for these pests.
Catherine Wissner Replied September 09, 2014, 1:40 PM EDT

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