The material allows 60% light transmission.
Yes, very easily!
It can be draped over the lemon tree, but it can cut down some of the light for the plant. Lemon trees love sunlight in the summer,even in the winter too..
Not sure the makeup but it was easy to use and place. However, beyond the first use it was unusable to re-deploy. It is more a first-use product to protect any plants/foliage you want to protect.
Yes, I use mine to cover my tomato plants and extend their life a little longer when it gets really hot and can sometimes get a plant to make it through the summer. Of course the plant won't bloom or produce tomatoes in extreme heat.
I'm not sure about grass hoppers, but it worked very well on my kale and kept the cabbage moths away. Last year we'd harvest kale leaves and have to inspect them closely for those little cabbage moth worms (the larval stage, I believe). Must admit, it sort of takes your appetite away to have to keep pulling little green worms off your food. -- especially since kale leaves are really crinkly and hide the little buggers very well. Yuck. They might work on the grass hoppers, too, but the cabbage moths fly from plant to plant, while the grass hoppers not only hop but they also crawl around. They might get under the row covers. I would suggest contacting a professional gardening center. Good luck!
Dalen Products Protective Yard and Garden Cover can be used to cover and protect newly seeded areas of your lawn.