• Whitefly

  larvae need a lot of nutrients for growth, and thus consume a large quantity of plant sap. This contains a high proportion of sugar, and the excess is excreted [...] es: If the population is very large, feeding on plant sap can affect the physiology of the plant, as a result of which growth is retarded. In full sunlight [...] whitefly control is essential to maintain healthy, productive crops and prevent the spread of diseases. Biological control of whiteflies uses a combination

• Potato/tomato psyllid

  Overview It is a pest of huge economic importance, which initially affected potatoes and in recent years has become a problem for other Solanaceae crops [...] parts of Europe, and the import into Mexico, is difficult, since Candidatus Liberibacter is considered a quarantine pest. Damage symptoms The main direct [...] potato/tomato psyllid The eggs are egg-shaped with a bright orange-yellow colour. They are attached to a strand which connects them to the surface of leaves

• Swirski-Mite Plus

  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). A. swirskii is sensitive [...] Release should be repeated after 4 weeks if the pest is not controlled. Consult a Koppert advisor or a recognized distributor of Koppert products for advice [...] action Predatory mites multiply in the sachet and disperse into the crop over a period of several weeks. Predatory mites use their piercing mouthparts to extract

• Long-tailed mealybug

  defoliation. The overall effect is a reduction of photosynthesis and therefore the yield. Flowers and fruit often drop off. Plant sap is rich in sugars, but low [...] l regions, but these days it is widespread throughout the world. The range of host plants of Pseudococcus longispinus is less extensive than that of the [...] ornamental crops, the mere presence of mealybugs is sufficient to render the product unfit for sale. A very small population can thus cause considerable

• Citrus thrips

  treatments. Even though citrus thrips is an important pest, it is unlikely to be on the fruit at harvest, so it’s not considered a quarantine risk on fresh fruit [...] When food availability is optimal, the life cycle lasts 20 days during October and November. When food is suboptimal and the weather is colder, the life cycle [...] General Citrus thrips is originally described from various localities in South Africa and is indigenous. It occurs throughout Southern Africa, East Africa

• Tomato russet mite

  Australia and is a pest in tomatoes in all areas where they are grown. Other members of the plant family Solanaceae may be affected to a lesser extent [...] The first nymphal stage is a transparent white colour and about 0.1 mm long. They usually develop to the 2nd stage within a day. All life stages look [...] Damage symptoms Damage is caused by the mites sucking out the contents of plant cells. Affected leaves are slightly curled and acquire a silvery sheen on the

• Potato tuber moth

  multiply during storage. This is a big problem when the tubers are used as seeds, because the pest moves to re-infest or infest a field where there was no presence [...] General The potato tuber moth is a major pest of potatoes, and can also attack other crops of the Solanaceae family. As with all lepidopteran pests, the [...] The pupae have a yellowish or reddish-brown color, and are about 0.84 cm long. The adults, about one centimeter long, are pale brown with a dark mottled

• Oleander scale

  oleander scales are a greyish, dirty white or yellowy colour, round in shape, with a scale whose apex is off-centred. This scale resembles a miniature fried [...] fruits affects market value. In olives this is seen as green spots on purple fruits. Damage to foliage is particularly important in ornamentals . Heavy [...] fried egg with a diameter of 2 mm. The newly hatched crawlers are roughly 0.3 mm long. They quickly attach themselves to the plant and form a scale. Colonies

• Pea leaf miner

  fruiting vegetable crops, however, a considerable quantity of foliage can get damaged before the harvest is affected. The size of a leaf tunnel depends on the [...] that emerges from its tunnel just prior to pupating, is known as a prepupa. This stage lasts only a few hours. [...] occurs in a variety of vegetable and ornamental crops. It originates from South and Middle America and has subsequently spread via plant material. It is now

• May beetle

  the position of the setae in their final abdominal segment is needed, although this is not a method which works for all species. They can best be identified [...] the larvae are fully grown a kind of earthern cell is created in the ground in which they pupate. The adult beetles emerge a few weeks later but remain [...] Although this subfamily contains a number of species which cause damage to crops, the most representative genus is the Phyllophaga . Given the external