• Biological Pest Control

  predatory mites are introduced into agricultural crops to prey on or parasitize harmful pests like aphids , spider mites , whitefly or caterpillars . Alternatively [...] specific pest species while leaving non-target organisms unharmed. Unlike chemical pesticides, which can have detrimental effects on ecosystems, biological [...] specific pest species. They have minimal impact on non-target organisms, minimizing collateral damage. Minimal resistance Pests typically do not develop

• Cabbage leafroller

  serve as hosts. Damage symptoms Caterpillars feed mainly on leaves, flowers and buds. Older caterpillars loosely spin newly opened leaves together such that [...] of 10 to 90 pieces and covered with a gelatinous layer on the upper side of leaves, preferably on major veins or depressions in the epidermis. The caterpillar [...] cabbage leafroller has also become a pest in greenhouse crops. Great damage can be inflicted on ornamental crops, such as roses, alstroemeria, azalea, cyclamen

• Phytophthora blight

  growth on the leaves. The centre is grey-brown with a light-green edge. On the stem, elongated brown lesions occur, usually circling the stem. On potato [...] early blight of potato. Damage symptoms Phytophthora causes root rot, seedling damping off and rot of stems, bulbs, tubers, leaves and fruits. Late blight [...] germination and attract the zoospores. The pathogen grows into the stem and on the plant surface and new sporangiophores (structures containing sporangia

• Leaf miners

  are damaging pests that tunnel through leaves, reducing photosynthesis and weakening plant growth. Their feeding patterns cause visible leaf damage, lower [...] that cause most damage all belong to the genus Liriomyza and are very common in temperate regions. Leaf miner damage Leaf miners cause damage to plants both [...] pests. The leaf miner species that cause damage in horticultural crops are mostly polyphagous; that is, they feed on many crops. However, this is not universal

• European corn borer

  appear in June. The eggs are laid mainly on the underside of leaves. The larvae initially feed on the leaves and then bore into the upper part of the maize [...] Africa and North America, where it was introduced. Damage symptoms Horizontal rows of holes in the young leaves, caused by larval feeding, provide an early [...] European corn borer attack. Later, frass and holes are easily visible on stems, or on the apical part of maize ears. Larval tunnelling weakens the stalks

• Bacterial wilt, brown rot

  potential host plants. Damage symptoms In potato, field symptoms of Ralstonia solanacearum are wilting and yellowing of leaves and stunted plants. Inside [...] through infected tubers, the wilting and collapse of plants happens rapidly. Leaves remain green after wilting, until they are completely desiccated. Infected [...] which is not seen in Clavibacter -infected plants. In tomato, the youngest leaves are affected first. They show signs of wilting during the day which may

• Tomato looper

  The cocoon is usually attached to the underside of leaves within folded edges, on random objects and on tomato fruit, often in a bunch of ripening tomatoes [...] through the leaves, which make them appear skeletonized. The last two instars may eat the entire leaf except for the midrib or other large veins. On tomatoes [...] are deposited singly or in pairs throughout the crop, on the lower and upper surfaces of leaves. The caterpillar passes through 6 instars. It has a green

• Codling moth

  first generation adults appear from mid May onwards. Eggs are laid singly on leaves or developing fruitlets and hatch after 10-14 days. The first instar larvae [...] Fully grown larvae leave the fruits and spin cocoons under loose bark, cracks in trunks or supporting stalks, or other places. Depending on the climate, there [...] y of pear, quince, peach and other fruits. It is very common in Europe. Damage symptoms After invading the fruit, the larvae first form a small cavity

• Canadian Thrips in Greenhouses & Grow Rooms

  September 19, 2024

  in the plant, leaving damage that resembles that of broad mites. Their feeding and oviposition damage can also leave significant scarring on fruits, foliage [...] pdf (greenhouseipm.org) ) Physical Damage All agriculturally significant thrips leave a very similar type of damage, regardless of the crop they inhabit [...] lesions, often peppered in dark spots of frass. This damage can be found on petals and the leaves. Thrips can also distort new tissue. Adults will often

• Strawberry

  various pests and diseases. Common pests that occur in strawberries are aphids , fruit flies , leafhoppers, caterpillars , plant bugs , plant parasitic [...] other pest mites , thrips and whiteflies . These pests can cause significant damage to the plants, leading to reduced yields and compromised fruit quality. [...] These diseases can weaken the plants, stunt their growth, and cause severe damage to both foliage and fruits, if not properly managed. Implementing IPM strategies