• Red palm weevil

  ferrugineus ) presence and only later stages of attack are conspicuous. However, the damage done before these later stages when detection becomes easier

• Sciarid flies

  also feed on root hairs, rootlets, and tender root, stem and leaf tissue. Later instars may even feed on plant stems. The injuries caused by feeding also [...] Pupation takes place in a small hole in the ground. Pupae are white, but later become yellow to brown. The posterior end of the pupa remains mobile. Recommended

• Powdery mildew

  foremost on the upper side of the leaves. In most crops, the white colonies later turn brown or grey. Severely affected leaves may turn yellow, curl up or [...] Leveilula taurica ) is through the stomata and the fungus grows inside the leaf. Later, the conidiophores in this case also protrude from the stomata. Conidia are

• Fusarium spp.

  occurs. Infected glumes and kernels become white, due to dehydration, and later turn pinkish-red as spores are formed. Ear infection decreases the baking [...] infection of the roots at the root tip, or in small wounds, for example where lateral roots branch off the tap root. F. oxysporum grows inside the roots towards

• Downy mildew of Cucurbits

  the underside of the leave fluffy growth appears which is first white and later turns grey-brown. This is actually the sporulation of the pathogens extruding

• Initial Experiences: Spidex Vital Lives Up to its Promises

  May 24, 2021

  Hopefully, this will continue when the greenhouse climate becomes drier later on.’ Sjaak van Dijk’s father was already using the predatory mite Phytoseiulus [...] the start of February. "I have three crops a year," he tells us five weeks later. "As the old crop is always cleared away, I start from scratch each time [...] have been favorable up to now. But, he says, the summer is yet to come. "Later on in the season, air humidity will fall. Although spider mites prefer a

• Spidex Vital lives up to its promises

  the start of February. ‘I have three crops a year,’ he tells us five weeks later. ‘As the old crop is always cleared away, I start from scratch each time [...] have been favourable up to now. But, he says, the summer is yet to come. ‘Later on in the season, air humidity will fall. Although spider mites prefer a

• Crazy roots, hairy roots, crown gall

  species cause the growth of galls on the stems, which are first white and later turn brown. Only Rhizobium radiobacter causes galls and tumours on underground

• Fusarium wilt

  infection of the roots at the root tip or in small wounds, for example where lateral roots branch off from the tap root. How to prevent Fusarium wilt Remove

• Entonem keeps young orchids free from fungus gnats

  under a microscope. First when they have just come out of the packaging and later after spraying. Dennis van der Wel explains, ‘We dampen the potting soil [...] second fine mist to rinse off nematodes that are on the leaves. A while later, I collect a few drops of drainage water from underneath the treated crop