- Jan 12, 2013
- Reaction score
- Woodstock, Illinois Zone 5
I think that everyone that grows and likes beans a lot doesn't grow only one variety or has the space to isolate their plants to completely prevent outcrossing. It's just something that we have to live with. I am lucky to have three main growing areas where I can if I want, grow only one growth habit type in each of my growing areas. But some outcrossing is always going to happen from time to time among the same growth habit. Since my early growing days I have always enjoyed finding interesting seed coat colors and patterns and trying to stablize them. I do also like to see the stable varieties stay the way they are.In correspondence with a commercial grower, I was told that beans are more susceptible to cross-pollination during heat stress or drought. She kindly checked two of her reference books for isolation distances and found that "70 feet is usually sufficient but if you are looking for more assurance, they recommend 300 feet."
I think what I am going to do with the Network beans when I send them out to the growers. I will put a statement printed on a seperate piece of paper that if they find a bean that is supposed to a true bush type and find any of the plants growing a runners. To cut out the plant with a hand shear to prevent outcrossing of a semi runner with other true bush beans they have growing. It will be difficult to probably impossible to prevent growers to grow only one type of growth habit beans.
In post #1,249 I said All the outcrosses I've ever seen usually produce a mixed bag of plant types and seed coats. That was not correct for me to say that. Most outcrosses will do that. There are exceptions. I have had a couple of outcrosses, maybe three at the most the grew stable right from the beginning,
I looked up Pale Grey Lavender on my spreadsheet and saw that I got it from a fellow in Belgium. I do have it marked as a pole habit. I have written to him and asked what is the growth habit of the bean. Perhaps I was getting this beans seedcoat mixed up with another bean that has a similar looking seed. We will find out.