Among the leaf-eating caterpillars, the bagworms (Psychidae) and nettle caterpillars (Limacodidae) are the most common defoliators in oil palm plantations in Sabah. Tobacco budworms can eat entire buds off the plants. Treatment is justified when one or more hornworms larger than 1 inch and without parasite cocoons (Cotesia congregata) are found per 10 plants checked.Since larvae with parasite cocoons eat much less, they should be counted as 1/5 of a caterpillar, meaning five worms with cocoons equal one healthy worm. Thresholds and Management. Nine concentrations (0.1, 0.08, 0.06, 0.04, 0.02, 0.008, 0.006, 0.004 and 0.002%) of diflubenzuron, a chitin synthesis inhibitor, were tested in the laboratory against freshly laid eggs, eggs prior to hatching, and the larval and pupal stages of tobacco leaf eating caterpillar, Spodoptera litura. Look for the erect hairs on the worm and a white stripe running along the bugâs body. Mostly, they feed at night. Investigations on âLife table studies of tobacco leaf eating caterpillar, Spodoptera litura Fabricius (Noctuidae: Lepidoptera) on different varieties of bidi tobacco (Nicotiana tabacum Linnaeus) and its chemical controlâ were carried out under laboratory condition during 2009-2010 at Bidi Tobacco Research Station, AAU, Anand. Spinosad is a safe microbial-based insecticide, but can have negative impacts on some beneficial insects . Because Btk is most effective on small, newly hatched caterpillars and breaks down rapidly, treatment timing is critical. in nursery and field during 1985-86 and 1986-87. a)Salient research findings for disease management i)Damping-off: Higher seed rate (> 4 kg/ ha) in nursery led to incidence of higher damping-off disease in nursery. Caterpillars must feed on treated leaves to be affected. The tobacco plant produces white, cream, pink or red flowers which grow in large clusters, are tubular in appearance and can reach 3.5-5.5 cm (1,25-2 in) in length. Aphid and leaf eating caterpillars are major insect pests on bidi tobacco in Nipani area (Anonymous.,2004). Feeding response of tobacco leaf eating caterpillar Spodoptera litura (Fabricius) to different types of tobacco. Tobacco budworms are a major pest of tobacco and cotton plants. Later, they become solitary and eat all the leaf, including the petioles. of Nipani tract. Important pests of greengram are cut worm, stemfly, aphids, thrips, Bihar hairy caterpillar, tobacco caterpillar, gram caterpillar, hawk moth or leaf eating caterpillar and pod borer. The bioefficacy of methomyl was evaluated alongwith other insecticides against tobacco leaf eating caterpillar Spodoptera litura, Fb. Metalaxyl MZ 72 WP (Ridomil) at 0.2% concentration was Tobacco, Nicotiana tabacum, is an herbaceous annual or perennial plant in the family Solanaceae grown for its leaves.The tobacco plant has a thick, hairy stem and large, simple leaves which are oval in shape. They can also wreak havoc as caterpillars on geraniums in your garden by chomping holes in buds and leaves. We all know that smoking tobacco is bad for humans. Tiny caterpillars are sometimes called the Tecoma leaf tiers or sesame leaf tiers (Antigastra catalaunalis) due to the way they wrap themselves in leaves with their silk when ready to â¦ The young caterpillars radiate from the egg masses (Photo 1), stripping the leaf surface and eating the leaf between the veins (Photos 2&3). Author(s) : â¦ It is the caterpillar (or larva) that does the damage. Some common leaf-feeding caterpillars It's killed a lot of people after all.