Southern blight

important plant pathogen that inhabits the soil, and is responsible for root and stem rot, wilting and damping-off of seedlings. It has a wide range of [...] favourable conditions for the development of the pathogen are temperatures between 25 and 30 ºC, relative humidity of over 90%, and a soil pH of under 7. The [...] range for germination is between 2.6 and 4.4, but it can occur between 2.6 and 7.7. Very humid soils favour development of the fungus. In the anamorphic form

Rose aphid

growth of buds and new shoots. Foliage and flowers are often disfigured and contaminated with sticky honeydew on which black sooty moulds develop. Life cycle [...] cycle and appearance of Rose aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses [...] 1.7-3.6 mm long and green or deep pink to red-brown. The antennae and sometimes the head is dark in colour. The siphunculi are black and bent outwards.

Tobacco whitefly

retarded. In full sunlight, leaves can wilt and fall. Such leaf damage can in turn influence the development of fruit and lead to a reduction in yield. The honeydew [...] high level of resistance to many insecticides and its propensity for the transmission of viruses. Life cycle and appearance of Tobacco whitefly The tobacco [...] egg, first, second, third and fourth larval stage (often referred to as ‘pupa’ although strictly spoken this is not true) and adult. The larvae are found

Codling moth

pomonella ) is a notorious, worldwide pest of apple and also occasionally of pear, quince, peach and other fruits. It is very common in Europe. Damage symptoms [...] the skin. The entry hole can be seen and is usually plugged by dry frass. The larva then burrows towards the core and eats a large proportion of the flesh [...] beneath is eaten away. Infested fruits usually ripen prematurely and drop off. Life cycle and appearance of Codling moth The adults have a wing span of 15-22

Woolly apple aphid

sticky masses of “wool” may contaminate leaves and fruits and can be a nuisance at harvest time. Life cycle and appearance of Woolly apple aphid In contrast [...] origin and has been distributed to other parts of the world mainly via infested apple rootstocks. It can occasionally also be found in pear, quince and a few [...] other aphids , the life cycle and survival from year to year of the woolly aphid depends entirely on wingless, parthenogenetic and viviparous forms. Sometimes

Pollination checklist tomato

Checklist indicates how the best pollination results can be achieved. Download Poster During pollination, a bumblebee bites onto the flower and makes the [...] humidity (RH) of between 50% and 80%. A relative humidity of more than 80%-85% will result in pollen not being released and the bumblebees will become inactive [...] will still collect pollen, and leave bite marks, but no fruit will grow. Bumblebees are active at temperatures between 8 and 32 degrees Celsius. Their optimum

Strawberry

accessory fruit. This means that the fleshy, edible part of the fruit does not develop from the plant’s ovaries, but from the receptacle that holds these same

Citrus mealybug

distribution and many and diverse host plants. In temperate regions of the world this mealybug poses a problem in greenhouse horticulture, and in the tropics [...] croton and kalanchoë, but also in roses and gerbera. Additionally, the citrus mealybug ( Planococcus citri ) can also appear in cucumber, melon and aubergine [...] the crop in various ways: Nymphs and females extract the sap from the plant, stunting growth and causing deformation and / or yellowing of leaves, sometimes

Working at Koppert

continue to develop and urges its employees to make use of internal and external training and courses. Our staff makes good use of these opportunities. At [...] family company in which cooperation and respect for people and the environment is important. The company is developing fast, so we are keen to draw people [...] employees have many opportunities to develop their careers. Koppert is recognized as a training company in many fields. To develop your career within the company

Fall Armyworm

eggs in clusters of 150-200 and can lay up to 2000 eggs in a lifetime. Eggs are white, pinkish or light green and spherical, and are usually laid on the underside [...] leaves, stems and reproductive parts of more than 100 plant species causing major damage to cultivated grasses, such as maize, rice, sorghum and sugarcane [...] Adults fly by night, and are attracted to lights, especially those with a strong ultra-violet component. Damage symptoms The developing larvae eat different