I have heard about spiders being used in agriculture to get rid of pests. Depending on the kind of insects threatening the crop, species of spiders are used. An organic method which ensures that the pest gets eaten without the use of a pesticide that can prove harmful to humans. In my case, it worked out just the opposite. One day we woke up to see that all our lady finger plants are covered in spider's web like this. So neatly done, it was lovely except for the fact that we had to pull out all the plants. I don't know if this was harmful or not, but I just didn't want to risk eating veggies like this which were covered in web and had small white tiny dots that looked like eggs to me.