In flowering plants, the megagametophyte (also referred to as the embryo sac) is much smaller and typically consists of only seven cells and eight nuclei. This type of megagametophyte develops from the megaspore through three rounds of mitotic divisions.t consists of three parts: The integument(s) forming its outer layer(s), the nucellus (or remnant of the megasporangium), and female gametophyte (formed from haploid megaspore) in its center. The female gametophyteâspecifically termed a megagametophyte âis also called the embryo sac in angiosperms.
Late winter or early spring is the best time to begin spraying an apple tree. Using horticultural oil spray helps to destroy any insects and their eggs on the tree before new growth begins.
Apple Tree with Apples image by Photo by Mary Osborne. Use an all-purpose fruit spray that contains a fungicide, such as Captan, and an insecticide, usually carbaryl or malathion, to control pests and fungus that can damage apple trees. Keywords: spraying apple trees, all-purpose fruit spray, insecticide fungicide apples. Mary Osborne has been an educational quiz writer since 2001. She is the author and illustrator of two children's books and her short stories have periodically appeared in literary journals since 1986. She holds a Bachelor of Arts in English from the University of Central Florida. Photo by: Photo by Mary Osborne.