10/12/2023 0 Comments Early blight tomato neem oilobliquea reduced conidial germination to 91.11, 84.44 and 80.06 per cent over control, respectively. It was followed by ga rlic observed (12.80 mm, 85.77 per cent) and eucalyptus (24.27 mm, 73.03 per cent) respectively. 5 0 mm with maximu m per cent inhibition of 8 9.4 4 over control. The results showed that turmeric extract recorded minimum radial mycelial growth of 9. The antifungal activity of crude pla nt extra cts of ten pla nt species, viz., Neem (Azadiracta indica), Prosopis (Prosopis juliflora), Onion (Allium cepa), Eucalyptus (Eucalyptus obliqua), Pungam (Pongamia pinnata), Curry leaf (Murrya koenigii), Garlic (Allium sativum), Henna (Lawsonia inermis), Turmeric (Curcuma longa) and Ginger (Zingiber officinale) were evaluated against Alternaria solani (Ellis and Martin) by using poisoned food technique under in vitro conditions. Among tested extracts, methanolic extracts of peppermint (15%) and eucalyptus (15%) were best in preventing the spore germination of the pathogen (P =0.01). Results indicated that methanolic extracts of peppermint (15 and 10%), lavandula (15%) and eucalyptus (15%) were more effective than methanol: water extracts and completely inhibited the growth of the pathogen. Fungicide mancozeb 80WP (0.2%) was used for better comparison. Poisoned food technique and spore germination assay were used to evaluate the antifungal potential of plant extracts against the pathogen. Methanol and pure methanol:water (50:50 v/v) extracts of peppermint, lavandula, eucalyptus, datura and nettle were screened for their antifungal activity against Alternaria sesami, the causal agent of Alternaria leaf spot of sesame at 5, 10 and 15% concentrations in Shahrood Agricultural Research Center, Shahrood, Iran, during 2010. Natural plant extracts / products have the potential as safe alternatives for chemical fungicides in plant disease management. Key wards: tomato, early blight, Alternaria solani, neem, Egyptian medicinal plants, tested medicinal plant extract treatment (TMPET). In addition extracts of garlic, neem, and lemon grass gave the most reduction in disease severity, followed by chilli, chamomile, sage and lantana respectively comparing with control (sprayed with only water).Considerably conclusion results of this study suggested that neem extracts and (TMPET) which are environmentally safe may be present as an important and promising control for tomato early blight with less production cost and possible improvement of such economic crop. Results also showed that all tested materials lowered the disease severity of early blight in field. Meanwhile, in vitro best result was obtained with neem leaves extract at 15%. Results indicated that, generally, the fungal mycelial growth was reduced and the spore germination was inhibited with neem and the tested medicinal plant extract treatments (TMPET) different concentrations (5%, 10%, and 15%). solani in vitro and under open field conditions. lantana leaves & fruits (Lantana camara), chilli fruits (Capsicum frutescens), chamomile (Matrecaria chamomilla), sage (Salvia officinalis), garlic bulbs (Allium sativum), lemon grass leaves (Cymbopogon citratus) and onion seeds (Allium cepa), were evaluated against A. Antifungal effect of aqueous extracts of neem leaves (Azadiracta indica) and seven Egyptian medicinal plant species, i.e. Early blight of tomato, caused by the fungus Alternaria solani, is perhaps the most common foliar disease of tomatoes, causes direct losses by the infection of fruits and indirect losses by reducing plant vigor. And try to water the soil without allowing water to splash leaves.Tomato (Lycopersicon esculentum Mill.) is considered the main vegetables cash crop for both local consumption and exportation in Egypt. Make sure and water plants, especially during dry periods. Maintaining vigorously growing plants is the best way to keep from getting blight. This process can leave some fruit exposed to sun scald but it is worth the effort. Neem can help suppress the growth of blight until the plant can grow new leaves. ![]() Any blight left on the plant can quickly spread so try to cut off all diseased leaves.Īlso, neem oil is an organic fungicide that can help control blight. ![]() If you notice yellowing leaves starting near the base of the plant that have a concentric brown spots, cut the leaves off and be very careful that the infected leaves do not touch healthy plants or leaves. If left unchecked, blight can quickly destroy entire leaves and eventually the entire plant. ![]() Plants that have been stressed tend to be perfect targets for Early Blight.īlight on tomatoes starts out with concentric brown spots on the leaves. Early Blight is a fungal disease and is rather difficult to control once it has infected a plant. ![]() One of the problems that is common with tomatoes in our area is Early Blight.
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