Spider mites become a real problem on tomatoes when the weather becomes hot. The generation time of the tiny sucking insects becomes as short as four or five days. Spider mites feeding cause the leaves to have a dusty faded look. In severe infestations, tiny webs cover the plant.
exists and is an alternate of. Merge this question into. Split and merge into it. Answer by Isadora Duncan. Confidence votes 51.8K. Anthracite is a teal-grey color but can range anywhere from black, to blue to grey and green. Anthracite is a hard, compact mineral coal that has a high luster and carbon content.
Settlers from Connecticut discovered the anthracite coal seams in the Wyoming Valley in 1762. The first recorded use of anthracite coal was in 1768. In 1775, mining of anthracite started in northeast Pennsylvania. The mine was located near Pittston. Wilkes-Barre saw the start of anthracite mining in 1776, with the mining occurring from outcrops along the banks of the Susquehanna River. In 1790, anthracite is discovered in the Schuylkill region of Pennsylvania and in 1792 anthracite is discovered in the Lehigh region of Pennsylvania.