• Southern blight

  and the main root. As a consequence, leaves higher up in the plant start yellowing. Severely affected plants present girdling of the stem, which causes wilting

• Fusarium spp.

  wilt ) is the species that causes vascular wilt. Initially, the leaves turn yellow and wilt, mostly on one side of the plant. Finally, the whole plant wilts

• Cryptolaemus montrouzieri

  clusters on plant foliage or near mealybug-infested areas. They are typically yellow-white in color and may be found attached to leaves. Larval stage: Cryptolaemus

• 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

• 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

• 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