• Biological Solutions Meet Peri-urban Horticulture

  February 4, 2019

  involves the management of plant pests and diseases using other organisms. The concept relies on an active human management role to achieve this and is an important [...] biological pest control . The first, which is referred to as classical, is where a natural enemy of a pest is introduced into the environment to achieve area-wide [...] pesticides. The same concept and tools, if adopted in peri-urban horticulture, could enable farmers deliver safe food to the market. This is where biological

• Fall Armyworm

  different parts of the host plant, depending on the crop, the stage of crop development, and the age of the larvae. On maize, young larvae usually feed [...] inverted Y-shaped mark on the front of the head and four large spots on the upper surface of the last segment. Pupae are reddish brown and measure 13 to 17 mm [...] General The fall armyworm is a polyphagous pest that is indigenous throughout the Americas. Recently, it has been found in Africa too. The caterpillars

• Chrysopa-E

  carrier material Dosage The dosage of Chrysopa-E depends on climate, crop and pest density and should always be adjusted to the particular situation. I [...] Pests Aphids and other pests, like mealybugs , Echinothrips and eggs of pest lepidoptera species . Mode of action Larvae of the lacewing attack their prey [...] mainly during the night. The larvae hide during the day. Pack size 100,000 eggs. Presentation 90 ml cardboard tube. Carrier None. Downloads FAQ Chrysopa-E A

• Swirski-Mite LD

  species and eggs and larvae of whitefly . Crops Do not use in tomato. Mode of action Predatory mites multiply in the sachet and disperse into the crop over [...] swirskii is most effective at temperatures between 20 and 32°C (68 and 90°F). It is not effective at temperatures below 18°C/64°F. Amblyseius swirskii is sensitive [...] in the crop, not exposed to direct sunlight Sachets already have an exit hole Hold sachets by the cardboard strip at the top, to avoid damaging the predatory

• Swirski-Mite

  Predatory Mites Poster Application Turn and shake the bottle gently before use Push the centre of the cap to open the dosage hole Sprinkle material on leaves [...] Natutec Airobug Dosage The dosage of Swirski-Mite depends on climate, crop and pest density and should always be adjusted to the particular situation. Start [...] on the best strategy for your situation. Environmental conditions Amblyseius swirskii is most effective at temperatures between 20 and 32°C (68 and 90°F)

• Phytophthora blight

  leaf wetness is required. Dispersal is by wind and rain causes the pathogen to be returned to the soil from infected plants. Dispersal in the soil happens [...] lesions with vague borders and white fluffy fungal growth on the leaves. The centre is grey-brown with a light-green edge. On the stem, elongated brown lesions [...] between 15 and 23 °C and higher water content than is optimal for crop growth. Phytophthora overwinters in roots, infected tubers and bulbs or in the soil in

• Downy mildew of rose

  of the pathogens extruding from the stomata. In lettuce, the foot is infected first and this causes the plant to fall over. In cabbage the stem is also [...] mildews, the optimum temperature is around 15 °C. The closer the temperature is to these 15 °C , the shorter the leaf wetness period that is required for [...] yellow and then turn brown. On the underside of the leaf fluffy growth appears which is first white and later turns grey-brown. This is, in fact, the sporulation

• Bacterial wilt, brown rot

  s roots on the stem. The vascular stem tissue is coloured brown and when the stem is cut, bacterial slime oozes from the wound. This is the way to distinguish [...] st organism in the United States. It is a commonly found soil-inhabitant in tropical and subtropical regions and is transferred by the introduction of [...] Ralstonia solanacearum is a plant pathogenic bacterium. It is a soil-borne disease and colonises the xylem, causing bacterial wilt and brown rot in a very

• Fusarium wilt

  may occur and cause different symptoms. Fusarium oxysporum is the only Fusarium that actually grows inside the vessel system of the host plant and spreads [...] blight in cereals and post-harvest decay. Fusarium oxysporum is the species causing vascular wilt. First the leaves turn yellow and wilt, mostly on one [...] one side of the plant. Finally, the whole plant wilts. Other symptoms are brown discolouration of the xylem vessels which can be seen when the stems are

• Bacterial soft rot, bacterial stem rot

  rot is first noticed when plants wilt at the time of first harvest or after that. The pith disintegrates and the stem becomes hollow. Because of the bacterial [...] bacterial growth in the pith, the stem seems wet and slimy. Above or below the hollow stem the vascular tissue keeps its normal colour. On the fruits, lesions [...] first are small and sunken, water-soaked and light to dark brown. They are adjacent to wounds and natural openings at the stem end. Later the fruit becomes