![]() This may be helpful where the disease causes severe blighting each year leading to reduced yields. Apply a synthetic fungicide or an organic fungicide (fixed copper) according to label directions, early in the season, when symptoms appear to slow the spread of the disease.Remove infected leaves during the growing season and remove all infected plant parts at the end of the season.Prune off the lowest 3-4 leaf branches once plants are well established and starting to develop fruits.Keep plants well mulched to minimize soil splashing.Monitor transplants carefully for signs of this disease.Provide adequate spacing to increase air circulation and remove all suckers that emerge from the plant base.The disease spores are wind-blown, allowing the disease to spread through a garden or neighborhood.Įarly blight symptoms on fruit Lesions with a yellow halo on foliage A severe early blight infection Management The disease can spread during wet or dry weather but is favored by rainfall and heavy dews. Infected, dead leaves may stick to fruits. When leaves die, fruits become more vulnerable to sunscald.Early blight is typically splashed by rainfall onto lower leaves early in the season. It can also be transmitted on seeds and transplants. The fungus overwinters in soil and on plant debris. This is a very common foliar disease of tomato plants that can result in defoliation and reduced yields.The disease can also move to stems and fruits and produce dark lesions. Individual lesions enlarge and coalesce and can kill entire leaves. The lesions develop a "bulls-eye" pattern of concentric rings that can be seen with a hand lens. A yellow halo usually surrounds the lesions. Infections begin as small brown spots on older leaves that quickly enlarge.Moreover, all tested treatments increased clearly total phenol content, peroxidase, polyphenoloxidase and chitinase activities, as well as, vitamince C contents as compared to control treatment.Brown spots on leaves at the bottom of tomato plantsĮarly blight - Alternaria linariae (= A. harzianum treatments were significantly increased total yield weight and average weight of tomato fruit. Concerning to yield parameters, Roxil and T. subtilis treatments caused the highest significant reduction in disease incidence and disease severity percentage during the two successive growing seasons 2013//15. Three fungitoxicants were investigated as foliar spray for their abilities for controlling early blight disease on naturally infected tomato plants under open field conditions. subtilis recorded highest reduction percentage of sporulation. solani growth was recorded with Roxil followed by B. Meanwhile, by using poisoned food technique the highest reduction percentage of A. harzianum treatments recorded highest reduction percentage of sporulation. ![]() subtilis followed by Roxil treatments, while Roxil followed by T. By using dual culture technique, the highest reduction percentage of A. Three different fungitoxicants, i.e., Trichoderma harzianum, Bacillus subtilis and Roxil Plus WP50 fungicide, were investigated against tomato early blight disease caused by Alternaria solani fungus in vitro and in vivo. Whereas, pigment contents (Chlorophyll a, b and carotene) were high in the order:-ve control > Score > Aliette while, pigment levels were substantially lower in +ve control. Both the fungicides Aliette and Score significantly increased the number of leaves, stem and root length, stem fresh weight and root fresh weights, stem dry weights and root dry weights over positive controls, while growth of negative control (water control) was, in general, substantially higher compared to fungicide treatments. The fungicides Score and Aliette were further checked in greenhouse and field experiments and found adequately effective against A. The fungicides Score, Cabritop, Aliette and Carbofuran at the concentration of 3μg.mL-1, significantly reduced disease severity by 50, 50, 40 and 60% (as per scale), respectively compared to the +ve controls. Effect of Cabritop was not significant at low concentration (0.5μg.mL-1) but it had significant effect at higher concentrations compared to positive controls. solani at the concentrations of 0.5, 1 and 3 μgml-1. The fungicides Score and Aliette reduced the spore germination of A. solani at the concentration of 0.5, 1, 3, 5 and 7μg. ![]() The fungicides Score, Cabritop, Carbendazim and Aliette decreased the growth of A. ![]() Five fungicides including Score, Cabritop, Carbofuran, Carbendazim and Aliette were evaluated for their efficiency against Alternaria solani under laboratory, greenhouse and field conditions.
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