• Plant Disease Management

  eye on their health and appearance. Look for any unusual signs, such as yellowing leaves, wilting, unusual growth patterns, spots, or lesions. Early detection

• Getting a head start - The importance of scouting in winter

  January 31, 2025

  in colour and growth, so when scouting for seedling diseases look for yellowing, wilted, stunted, or dead plants. In general, certain weather and soil [...] The symptoms are apparent in winter and early spring. Early symptoms are yellowing and browning of leaf tips, and in a later stage crown and root rot. This

• Poinsettia. Main pest pressures

  May 21, 2019

  the leaves, which can result in rejection and lost sales. Control Strategy Yellow Horiver Traps These are required for monitoring pest levels, and calculating

• Orius laevigatus

  smaller versions of the adults but lack fully developed wings. Nymphs are yellow initially, turning darker (orange to brown) as they mature. They have p

• Pierce's disease of grapevine

  a green leaf suddenly dies and turns brown with adjacent tissue turning yellow or red. This desiccation spreads and the whole leaf may shrivel and drop

• Scia-Rid

  after infection. Visual effect Infected pest insects in the root zone turn yellow to brown but may be difficult to find, due to rapid degradation. Pack size

• Encarsia formosa

  that is dark brown to black in colour, a dark brown to black thorax, and a yellow abdomen. The male is entirely black.

• Aphidius colemani

  causing it to swell. The cuticle turns from a hard, leathery brown to a golden yellow casing, known as a mummy. Parasitized aphids turn into golden brown mummies

• Diglyphus isaea

  three larval instars: the first is colourless and transparent, the second is yellow and semi transparent with a brown fat body, and the third larval instar

• Amblydromalus limonicus

  The nymphs are larger than the larvae, have eight legs, and are a whitish yellow colour. Adult mites have eight legs, are translucent white in colour, and