The adult grape leafhopper is about 0.12 inch (3 mm) long and light to pale yellow with distinct dark brown and reddish markings. Leafhoppers. Leafspots caused by Colletotrichum sp 5 5. Leafhoppers damage is often insignificant. French. Chinese ro.se beetle damage to basil 2 2. Fusarium disease ofbasil 5 6. A native of central Asia and northwest India, basil is a member of the mint family. Phyllis G. Weintraub, in Insect Pests of Potato, 2013. Adult potato leafhopper Damage: Both the adults and the numphs feed on the underside of the potato leaves causing a stippling or speckling of the leaf surface called "hopper bum". Basil, Ocimum basilicum, is a short lived annual or perennial plant in the family Lamiaceae grown for its leaves which are used as a herb.The basil plant grows from a thick taproot and has silky green opposite (paired) oval leaves which grow to be 3–11 cm (1.2–4.3 in) long and 1–6 cm (0.4–2.4 in), branching out from the central stem. Early leafhopper damage often appears as a graying or silvering of infested turf areas. All basil is heat- and sun-loving, regardless of variety. Basil (Ocimum basilicum) (Sweet Basil, Opal Basil, Thai Basil)Basil is a popular herb grown for its aromatic leaves which are used fresh or dried and used as a spice. If the pests eating your basil leaves are a species of leafhopper, you will see the channels they dig in before you see the small insects, each less than 1/4 inch long, with neutral tan coloring. Affected turfgrass lose vigor and may die as a result of extended presence of high populations. Damage. Both adults and nymphs run sideways and are good jumpers. They are small insects, typically less than 1/6-inch and are slightly wedge-shaped. Grape leafhopper. Damage to basil by root-knotnematode 6 7. Brasilian leafhopper damage to basil 4 4. Chilling injury ofharvested basil 7 Depending on species they may be green, brown or yellow in color and often have colorful markings. Example of leafhopper damage on grape leaves: “light” (top left), “moderate” (top right), and “heavy” (bottom, center). Photo courtesy of J.M. Originating from India, basil plant leaves may be found in a plethora of cuisines from Italian to Thai and can be used to flavor foods, vinegars, oils, teas, and even to scent soap. Leafhopper adults (1/4 inch long) are slender, wedge-shaped insects that fly or disperse rapidly when disturbed. Sage leafhopper damage increased brightness and yellowness but decreased greenness of the oregano herbage. However, you may sometimes be surprised to find holes or other basil leaf damage in basil leaves . Nymphs do not have wings and are generally lighter in color than adults. Slug damage to basil 3 3. Leafhoppers overwinter as adults and are found in spring on basal grape leaves and weeds. Deal with leafhoppers by spraying the plant with horticultural oil, neem oil, or insecticidal soap. Leafhoppers can be common insects of lawns. Figure 1. Their color is variable but many of the more common turfgrass species are generally light colored or brown. Leafhopper. Although leafhopper sightings are not uncommon on golf courses and lawns, severe injury usually occurs only with large leafhopper populations. The edges of the leaves curl down ward, first turning lighter green, then yel- low, and finally brown and necrotic. As feeding and injury continues, the turf begins to dry out and gradually turns from yellow to brown. Both nymphs and adults suck sap from the leaves, resulting in yellowing or bleaching. Leafhoppers range in size up to about 10 mm long and have five nymphal instars; all stages feed on the aerial parts of the plant, nymphs and adults feeding on the same plants. At very high infestation levels, leafhopper feeding can result in severe thinning or even death of the turf stand. Damage is cumulative, resulting in a leaf that looks like the green color has been increasingly sand-blasted (Figure 2). Figure 2. 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