brown blotch

brown blotch

[′brau̇n ¦bläch]
(plant pathology)
A bacterial disease of mushrooms caused by Pseudomonas tolaasi and characterized by brown blotchy discolorations.
A fungus disease of the pear characterized by brown blotches on the fruit.
Mentioned in ?
References in classic literature ?
Far, far down I saw a small brown blotch near the bottom of the canon.
From this point to caudal peduncle it is a conspicuous dark brown elongated stripe, along lateral line and meeting a small round dark brown blotch on caudal peduncle; some individuals with the anterior portion of this stripe absent from snout to vertical through dorsal-fin origin.
Symptoms of brown blotch disease are sunken, dark, and brown spots on the mushroom fruit body surface (Olivier and others 1978).
Mushrooms washed by this process were free of adhering soil, less subject to brown blotch than conventionally washed mushrooms, and at least as resistant to enzymatic browning as unwashed mushrooms during storage at 4[degrees]C.
web blight (caused by Rhizoctonia solani Kuhn), brown blotch (caused by Colletotrichum capsici Syd.
Coloration in alcohol: Upper surfaces slate with little indication of pattern (scattered darker markings on lower back, traces of a pale interorbital bar, fragments of limb bars); side of head darker without facial markings except for cream line along upper lip (Figure 2); brown supratympanic stripe; brown blotch on posterior flank, extending into groin and along of thigh; comparable blotch over most of posterior surface of thigh, bearing cream flecks or not; venter cream, heavily mottled with brown; throat somewhat darker than venter; underside of shank brown with cream flecks or not.
Keep on the lookout for blossom-end rot a soft, dark brown blotch on the bottom of a tomato.
with a large, solid, reddish brown blotch on the lip comparable to that of O.
Last is the leaf-mining moth, whose caterpillars cause brown blotch mines on horse chestnuts as well as several acers or maples including sycamores and Norway maples.
It has combined resistance to several major diseases, including Cowpea aphid-borne mosaic virus, brown blotch [caused by Collectotricum capsici (syd.
There are several varieties, including Lilac Wonder (pale, purple flowers with a brown blotch at the base of each) Purple King (deep purple with a striped and spotted white and brown centre) and a white-flowered one, White Splendour.