• Tobacco aphid

  The tobacco aphid tends to form denser colonies, closer to the top of the plant, than the peach potato aphid . It is not known to what extent tobacco aphids [...] across the body. The antennae are 0.7-1.0 times the body length, reaching to the siphunculi. The body length is 1.2-2.3 mm. [...] content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The excess sugar is secreted in the form of honeydew, making the

• Potato aphid

  content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The excess sugar is secreted in the form of honeydew, making the [...] with unfertilized viviparous females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult they [...] tomato), depending on the food source. Even the winged forms can be red. Wingless potato aphids are 1.7 - 3.6 mm long, elongated, with a dark longitudinal

• Cotton aphid

  content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The excess sugar is secreted in the form of honeydew, making the [...] and the density of the population. Large individuals (up to 1.8 mm long) are usually dark green to black, while aphids produced in overcrowded colonies at [...] with unfertilized viviparous females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult they

• Cottony soft rot

  high soil water content over a prolonged period of time. The sclerotia germinate directly and form mycelium or produce apothecia (fruiting bodies) containing [...] source of infection for the next crop. The dispersal to neighbouring plants is by mycelial growth. How to prevent Cottony soft rot Practice dry cultivation/be [...] disease its name cottony soft rot. In the mycelium, big, dark sclerotia are formed. They can easily be seen with the naked eye and look like rat droppings

• Green peach aphid

  content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The excess sugar is secreted in the form of honeydew, making the [...] with unfertilized viviparous females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult they [...] of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or, if the infestation occurs early enough in the season,

• Aphids

  therefore need to extract large quantities of sap in order to get sufficient protein. As a consequence, the excess sugar is secreted in the form of honeydew [...] more about What are aphids? Aphids form a single, very large group of insects: the super- family Aphidoidea, belonging to the order Hemiptera . The aphids [...] identical to the mother. In other words, they are clones. Because there is no genetic recombination, different characteristics, such as colour forms, or resistance

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• Verticillium wilt

  the gum causes the xylem vessels to get blocked, which in turn causes the plant to wilt. Spores may be wind-dispersed to new hosts. In the senescent tissue [...] mycelium or the microsclerotia are formed. The spread of the fungus by mycelium growth is limited. Dispersal from plant to plant takes place via water, soil [...] leaves are pale-green, then orange-yellow. In the beginning the plant seems to recover at night. The symptoms may occur only in parts of the plant. Cutting

• General Conditions Koppert

  Failure to do the above will result in the Buyer’s right to invoke the failure of the Natural Enemies, V1 Pollinators and/or Products to answer to the agreement [...] Pollinators and/or Products as notified to the Buyer by Koppert from time to time. Koppert reserves the right to amend these stipulations, instructions [...] prejudice to Koppert’s right to demand compliance with the obligations to which the penalty clause pertains and without prejudice to Koppert’s right to claim

• Glasshouse potato aphid

  with unfertilized viviparous females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult they [...] potato aphid is rather squat, of medium size (1.8 - 3.0 mm long) and oval in shape. It has a light yellow-green to brown-green colour, and has an overall shiny [...] a dark thorax and a dark abdomen that has pale to dark transverse bands. The body shape is similar to wingless females, but is 2.0-3.0 mm long. The glasshouse