the corn earworm The eggs of corn earworm are a milky-white colour, which turn dark grey before hatching, and have a ribbed spherical shape. The…
parts of the stem. Gerbera flowers deform and discolour with the leaves turning bronze, mainly along the midrib. Even a mild infestation can cause…
leaves. In most crops, the white colonies later turn brown or grey. Severely affected leaves may turn yellow, curl up or drop off. Solution Finder…
d by Encarsia formosa turn black, Bemisia tabaci pupae become brownish. Whitefly pupae parasitized by Eretmocerus eremicus turn yellow, the adult…
often attended by ants. The ants will clean and protect the coccids and in turn benefit from a rich food source. The honeydew also quickly becomes…
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…
Fusarium wilt ) is the species that causes vascular wilt. Initially, the leaves turn yellow and wilt, mostly on one side of the plant. Finally, the…
Fusarium oxysporum is the species causing vascular wilt. First the leaves turn yellow and wilt, mostly on one side of the plant. Finally, the whole…
causes small green to dark brown spots to occur on leaves. Those spots then turn into dark brown angular lesions with a yellow halo restricted by leaf…
are nearly flat, ca 1 mm in diameter and white when first laid but later turn yellow. The black head of the larva can be seen just before hatching.…
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