• Boisduval scale

  can be a pest of orchids, palms, pineapples, bananas and many other plants. Damage symptoms The first sign of Boisduval scale is the presence of the scales [...] tissue at the feeding site. In orchids, this scale tends to prefer the leaf midrib and the portion of the petiole that is covered by the sheath. Small infestations [...] cast skins of the nymph form a light yellow spot near the centre of the scale called the exuvium. Adult females can produce up to 200 eggs and live up to

• American serpentine leaf miner

  roughly one hour the larva crawls out of the leaf and falls to the ground. This occurs in the early morning. The larva crawls into the ground to pupate [...] enter the plant tissue via the feeding spots. Life cycle and appearance of American serpentine leaf miner The life cycle of a leaf miner has the following [...] ovipositor, usually in the upper side of the leaf. Egg spots are oval and hard to distinguish from feeding spots. The larvae of Liriomyza trifolii are

• Macrocheles robustulus

  and other soil-dwelling insects. The mites appear in and on the soil and at the base of plant stems. Feeding behaviour of Macrocheles robustulus Predatory [...] is used for the control of the following pests: Sciarid flies (fungus gnats) Thrips Lyprauta larvae The predatory mites feed on larvae of sciarid flies [...] about 0.3 x 0.2 mm in size and pearly white. Best conditions for use of Macrocheles robustulus For optimal results the soil has to be moist, rich in organic

• Tomato leaf miner

  roughly one hour the larva crawls out of the leaf and falls to the ground. This occurs in the early morning. The larva crawls into the ground to pupate [...] bacteria enter the plant tissue via the feeding spots. Life cycle and appearance of Tomato leaf miner The life cycle of a leaf miner has the following stages: [...] percentage of the larvae remain hanging on the leaf and pupate there, sometimes on the upper surface but more commonly on the underside. The late third

• How to prevent Fusarium in pepper crops: Protect your plants with Trianum

  November 18, 2024

  granule that can be sprinkled into the planting hole before planting. The best results are achieved by treating the plants early at the plant nursery with [...] This can be done using the Trianum-G Tool, a device that helps to apply the exact dose in a simple way. By using Trianum-G at the beginning of cultivation [...] several mechanisms, Trianum protects the roots against Fusarium. Preventive application of Trianum from the start of cultivation is essential to prevent early

• Mottled arum aphid

  along the midline, and a large horseshoe-shaped spot on the back of the abdomen. These black markings can be highly variable. Adult females are 1.2-2.6 mm [...] colonies of mottled arum aphids can greatly reduce plant vigour and kill the plant through sucking of plant sap. However, also at lower densities the aphids [...] large amounts of honeydew, which provides an excellent substrate for the growth of black sooty mould. Large areas of mould covering the leaves can reduce

• Oleander scale

  symptoms Scale infestation can be seen by the appearance of the scale armour on stems, leaves and fruits of hosts. Infestations on the leaves and stems may cause [...] 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 [...] Colonies mainly form on the underside of leaves. After 1 to 2 months, the female reaches adulthood and begins to lay eggs. An adult female may live for

• Vine mealybug

  an adequate intake of protein, mealybugs must therefore ingest large quantities of sap, getting rid of the excess sugars in the form of honeydew. Charac [...] growing on this honeydew. Additionally, the white, waxy secretion of the mealybugs, reduces the ornamental value of the affected plants. Fruit and flowers are [...] If the population is high, whole bunges of grapes can be colonized. The taste can also be affected. An infection by Planococcus ficus can make the plants

• Tomato leafminer

  cycle and appearance of Tomato leafminer The female moth of the tomato leaf miner ( Tuta absoluta ) lays about 260 eggs. The eggs of the tomato leaf miner [...] occur underneath the crown of the fruit and even inside the fruit itself. On leaves, the larvae only feed on mesophyll tissues, leaving the epidermis intact [...] mine inside the leaf, stem or fruit. In the second to fourth instars they become greenish with a black band behind the head. The prepupae of the tomato leaf

• Cabbage root fly

  white in colour. The larvae are white or whitish-yellow, 7-10 mm in size, legless, with a wreath of appendages at the end of the body. The pupa is about 5-6 [...] in 2-4 generations. The cabbage fly lays about 120 eggs on the soil surface close to the host stem, or sometimes on the plant. Damage symptoms The larvae [...] and even plant death. Larvae also feed on the aboveground part of the plant, creating tunnels in the veins of the leaves. Infested plants often exhibit yellowing