Chili pepper

ical to lanceolate. The fruit (the peppers) usually develop from a pale yellow to a bright red when ripe. Varieties can come in other colours as well. [...] About The particular species of chili pepper, Capsicum frutescens, is at times categorized under the species Capsicum annuum . The pepper cultivars of [...] can both be annual or perennial (short-lived) plants. The plant’s flowers are white and have a greenish white or greenish yellow corolla. The plant’s berries

Two-spotted spider mite

cause damage to the host plant by feeding on plant sap. They mainly occur on the underside of leaves where they pierce the cells and suck out the contents [...] contents. The empty dead cells become yellow, and in many plants the damage can also be seen on the upper surface of leaves as small yellow dots. The destruction [...] die. In tomatoes and cucumbers, as little as 30% damage of the leaf surface can lead to loss of the crop. The nymphs and adults also produce webs, and plants

Verticillium wilt

produces gum in the vessels. The presence of both the fungus and the gum causes the xylem vessels to get blocked, which in turn causes the plant to wilt. Spores [...] Spores may be wind-dispersed to new hosts. In the senescent tissue, the resting mycelium or the microsclerotia are formed. The spread of the fungus by mycelium [...] occur on the stem. In tomato, sometimes V-shaped lesions are formed on the leaf, between the veins. 'Early dying' disease of potato only occurs as premature

Black root rot of cucurbits

restricted to a few of the roots but in severe cases all roots may be infected. At the final stage of the disease, only vascular tissue remains because the cortex [...] line on cucumber roots. The lesions are slightly sunken and are mostly formed around the point of attachment of lateral roots and root hairs. The lesions [...] at 10 °C the lesions are light-brown. The lesions can be enclosed by pseudostromata: dark coloured tissue that looks like black stripes. The disease is

Large blackberry aphid

siphunculi. The cauda is short and triangular. The aphids overwinter as eggs on blackberry plants. After emerging in spring, the aphids mainly feed on the underside [...] General The large blackberry aphid, Amphorophora rubi , is very similar to the large raspberry aphid Amphorophora idaei . As both aphid species are host [...] host specific the host plant is the simplest method to distinguish these two species. The large blackberry aphid is widely distributed in Europe and also

Leek

‘trenching’). The plant is usually sold as a small seedling and planted in a greenhouse. Later on, as weather permits, the leek is planted outside in the soil. [...] About The vegetable leek is a cultivar of Allium ampeloprasum , the broadleaf wild leek. In the past, many different scientific names were used to identify [...] of leek, but now they are all classified as cultivars of Allium ampeloprasum . The part of the plant that can be eaten is at times erroneously called a stem

Woolly apple aphid

occur during the summer months, also on new growth. Water shoots arising from the trunk or main branches, are very frequently attacked. The aphids mainly [...] can be a nuisance at harvest time. Life cycle and appearance of Woolly apple aphid In contrast to other aphids , the life cycle and survival from year [...] April (in the northern hemisphere) and around the end of May, large colonies covered by conspicuous white, sticky “wool” can be seen, mainly on spurs and

Picusan

dispenser in the top basket of the trap When using the kairomone: place the kairomone in the white bucket of the trap Pheromone and kairomone can be used si [...] effectively reduces the reproductive potential of the population. Presentation Ten sets in a box. Preparation When using the pheromone: place the pheromone dispenser [...] simultaneously Application Place Picusan traps on the ground at least 5 metres away from the palm trees Replace the pheromones and/or kairomones at least every

Damping-off

enable the spores to move through water. The zoospores are chemically drawn to the growing roots of young plants and move towards them through the soil water [...] bulbs. At first, the plants recover during the night, but later the plants wilt irreversibly. In potted plants the flower buds fall off. The side roots rot [...] of the root system survives. On the border between air and soil or substrate the plant turns brown. A typical symptom of a Pythium infection is the easy

Ercal

carefully inside the greenhouse Bend and tear off the strips opposite to the mounting hole Make sure not to touch the pupae during handling Suspend the cards in [...] until control is achieved. Depending on the specific situation, it may be better to switch to the use of En-strip or Enermix . Consult a Koppert advisor [...] advice on the best strategy for your situation. Environmental conditions For optimal efficacy the 24 hour average greenhouse temperature needs to be at least