Causes of ALS. ALS is a somewhat diverse and decidedly mystifying disease. In more than nine out of every 10 cases diagnosed, no clear identifying cause of the disease is apparent, that is, patients lack an obvious genetic history, complete with affected family members.
Here is a list of some of the more common varieties, along with fruit and plant descriptions. 1  Aristocrat - this variety features a waxy skin and is medium green in color.  Black Zucchini - very dark green skin and almost white flesh, very common variety of zucchini.
Hand-pollination between zucchini and squash allows you to control what types are cross-pollinated. Known as one of the home gardenâs most prolific producers, zucchini (Curcurbita pepo) is a type of summer squash. It can easily cross-pollinate with some other types of summer squash, and this is often very desirable as it can produce interesting variations.