Search results
Results from the WOW.Com Content Network
Root rot is a condition in which anoxic conditions in the soil or potting media around the roots of a plant cause them to rot. This occurs due to excessive standing water around the roots. [ 1 ] It is found in both indoor and outdoor plants, although it is more common in indoor plants due to overwatering, heavy potting media, or containers with ...
When the scion is grafted onto Mahaleb, symptoms consistent with Phytophthora root rot can be seen. To distinguish between root rot and x-disease the wood under the bark at the graft union should be examined. If it is x-disease the wood at the union will have grooves and pits this causes a browning of the phloem and shows the cells in decline ...
Weeping Higan Cherry trees are rather prone to problems, particularly in dry soil. A type of bacterium can cause leaf spots and twig cankers. Small, reddish spots dry and drop out. A fungus can cause reddish spots which drop out leaving shot holes. Once the holes appear the leaves may fall from the tree and the disease is worse in wet weather.
Blossom end rot on a grape tomato. Calcium deficiency symptoms appear initially as localized tissue necrosis leading to stunted plant growth, necrotic leaf margins on young leaves or curling of the leaves, and eventual death of terminal buds and root tips. Generally, the new growth and rapidly growing tissues of the plant are affected first.
Peach tree leaves displaying various stages of the shot hole disease: brown spots on the leaf with conidium holders in the middle (center) that eventually fall off, leaving BB-sized holes behind (left) Shot hole disease of apricot leaves. The fungal pathogen Wilsonomyces carpophilus affects members of the Prunus genera. Almond, apricot ...
Trees began to defoliate early in the spring and eventually 25,000 trees died by the end of the growing season. This was 10 percent of Pennsylvania's cherry tree acreage at the time. [22] Some trees were sprayed in 1945 at the end of the growing season and some trees were not.
Prunus ilicifolia flowers. It is an evergreen shrub [4] or small tree approaching 15 metres (49 feet) in height, [12] with dense, hard leaves [4] (sclerophyllous foliage). The leaves are 1.6–12 centimetres (3 ⁄ 4 – 4 + 3 ⁄ 4 inches) long with a 4–25 millimetres (1 ⁄ 8 –1 in) petiole [12] and spiny margins, somewhat resembling those of the holly.
It is present where the pathogen causes a lesion localized at or about the collet between the stem and the root. The lesions develop around the stem eventually forming a "collar". Observationally, collar rot grades into "basal stem rot", and with some pathogens is the first phase of "basal stem rot" often followed by "root rot".