• Root rot of carrot

  brown to black, moist, mostly circular spots 0.5 -1.2 cm diameter that extend only to 2 mm in the root, up to 20-25 per carrot root. They occur haphazardly

• Citrus mealybug

  and appearance of Citrus mealybug Adult females of Planococcus citri are 2.5 - 4 mm long and 2 - 3 mm in breadth. Seen dorsally, they have an oval form; [...] slightly longer ‘tail filaments’ . The tail filaments are always shorter than 20% of body length. They produce little wax, so that the light yellow to pink

• Manual Wireless Beehome

  Switching on the transmitter signal 12 Receiver 12 5 Operating the Wireless BeeHome system 5.1 Transmitter 13 13 Controlling the transmitter with [...] address/frequency (see 5.1). Two neighbouring growers must therefore use different digital addresses/frequencies for both the transmitters (see 5.1). When placing [...] ly check every 5 minutes whether there is a signal from the transmitter. After transmitting the ‘open or close’ command, it can take 5 to 10 minutes before

• Chrysoperla carnea

  including low temperatures (average > 12°C/54°F). It is most effective at 20-28°C (68-82°F). Feeding behaviour of Chrysoperla carnea Lacewing larvae search [...] more closely spun cocoon is off-white and egg-shaped, about 3 mm long and 2.5 mm thick. The space between the inner and outer cocoon is filled with fine

• Thrips

  are predators, and fewer than 20 species can cause problems in agriculture and horticulture. Thrips are small insects (0.5-14 mm), with the largest species [...] species found in the tropics. In temperate regions they are not larger than 2.5 mm. All thrips species that cause damage in green-houses belong to the family

• Diglyphus isaea

  times at weekly intervals or until control is achieved. At low temperatures (<20°C/68°F) it might be better to use Minusa. Consult a Koppert advisor or a [...] pupa is green with red eyes subsequently turning black, and measuring about 1.5 mm. Adult stage: The appearance of the adult is already clearly visible. Pupae

• FAQ Nematodes

  on the pump and the spray boom? The pressure on the nozzle may not exceed 20 bar (190 psi), with conventional large volume nozzles. Why should the soil [...] What should be the temperature of the spray water? Preferably around 15 – 20°C (59 – 68°F) but certainly not above 25°C (77°F). Above 30°C (86°F), nematodes [...] Which pH and EC values are safe? pH values between 4-8 and EC values up to 5 are safe for nematodes. With which pesticides/fungicides can I mix a nematode

• A life-long passion for predatory mites

  October 8, 2024

  Female mites produce large eggs that weight about 20% of their body weight. And they do this 4 to 5 times a day. This means that they have a voracious

• Canadian Thrips in Greenhouses & Grow Rooms

  September 19, 2024

  because of their long and narrow feather-like wings. Measuring less than 2.5 mm in length, these small and slender insects are prevalent pests in greenhouses [...] weeds, they can only develop within a narrow range of temperatures, between 20°C and 30°C. Their damage is also distinct. The stippling can appear more like