• WARNING: Bumblebees – Keep them Cool this Summer!

  July 2, 2019

  that work in a greenhouse have an advantage in that it is easier to manage the temperatures indoors unlike outdoors. On a watermelon farm in Texas temperatures [...] keeping the hives shaded. A second method that is also known to help in keeping the hive cool is by digging a large enough hole for it to fit. Usually, these [...] can mean death from the heat. Therefore, it is important to ensure proper steps are taken by the grower to help the bumblebees to stay cool. When bumblebee

• Help! How Does Thrips get Into My Crop?

  May 6, 2019

  hides away in sheltered spots, in crevices, on plant waste, or in the ground. Their pupae are also concealed in the soil. Thorough disinfection is therefore [...] insect netting in the vents can certainly help, but it is not always enough. If the infestation level is high, they can simply fly in through the doors [...] If the plant nursery does not use chemical products with a long-lasting residual effect, it is easier for the grower to build up a population of natural

• Corn earworm

  features are its size in the final instar (approximately 35 mm) and its longitudinal stripes on the body. When the larva has fully developed, it stops feeding [...] of two to three weeks, developing a greyish colour and a black cephalic capsule in the first stage, but later adopting a variety of colours such as green [...] days. It then pupates for ten to fourteen days, or three to five months in areas with very cold winters. The pupae measure around 18 mm and have a slightly

• Cannabis aphid

  General Although it was first described in 1860, the cannabis aphid ( Phorodon cannabis ; a.k.a. bhang aphid or hemp aphid) is a very new pest to North [...] North America. It was first seen on cuttings originating from Colorado in 2016 and is now widespread throughout that state and Oregon. Its range also includes [...] next generation of aphids in the spring. In greenhouses, sexual reproduction is very rare and only triggered if lighting signals a shortening day.

• Trianum effectively controls Pythium in cucumber

  to Pythium. ‘My crop gets 20 hours of light a day, which means it requires a lot of water. That larger quantity of water makes the plant more susceptible [...] which makes it susceptible to Pythium. A very acceptable level Kees grows Rijk Zwaan’s variety Skyson RZ, which has a lot of vigour and is suited to exposure [...] Wubben, Kees Hendriks runs a farm covering over six hectares along Hoefslag road in the Dutch village of Pijnacker. Built in 2011, the farm has two sections

• Feltiella acarisuga

  on various spider mite species, in particular the two-spotted spider mite . Feltiella acarisuga is a key component in integrated pest management (IPM) [...] acarisuga is available at Koppert as Spidend . How to use Feltiella acarisuga The predatory gall midge Feltiella acarisuga is available in a bottle ( Spidend [...] grown larva is about 2 mm long. At the end of the last larval stage, the larva spins a white cocoon near a leaf vein and pupates within it. By closely monitoring

• Greenhouse whitefly

  whitefly need a lot of protein for growth, and thus consume a large quantity of plant sap. This contains a high proportion of sugar, and the excess is excreted [...] the population is very large, feeding on plant sap can affect the physiology of the plant, as a result of which growth is retarded. In full sunlight, leaves [...] leaf damage can in turn influence the development of fruit and lead to a reduction in yield. The honeydew deposited on fruit makes it sticky. Dirt adheres

• Aphidoletes aphidimyza

  aphidimyza is available in bottle ( Aphidend ). Open the bottle in the greenhouse Place the bottle directly on the soil or rockwool slabs or hang it in-between [...] prey for the newly hatched larvae is normally not difficult. When a gall midge larva attacks an aphid, it injects a paralyzing toxin that also starts [...] for aphid control Aphidoletes aphidimyza is a species of predatory gall midge known for its effectiveness in biological pest control , specifically targeting

• The Importance of Quality at Koppert

  December 3, 2019

  breeding stock is a prime quality factor when the mites are released. It ensures that the next generations establish themselves well in the crop so they [...] of Spidex is conducted once a week and each batch is checked. “While the standard average egg-laying performance for Phytoseiulus persimilis is 10 eggs per [...] us persimilis Creating a Cleaner Safer Berry Spidex – quality matters It may be our oldest product, but we continue to spend a great deal of time and effort

• Diglyphus isaea

  Diglyphus isaea is a small parasitic wasp belonging to the family Eulophidae within the order Hymenoptera . It is widely recognized for its role as a biological [...] larva hatches, it remains beside its host, punctures it and sucks it empty from the outside, as a result of which the leaf miner larva dies. A few days after [...] wasp Diglyphus isaea is available in a bottle ( Miglyphus ). Release parasitic wasps between the leaves of the crop in the morning or in the evening The dosage