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Root rot and stem rot Macrophomina phaseolina Bacterial wilt Pseudomonas solanacearum 1. ROOT ROT and STEM ROT – Macrophomina phaseolina Symptoms The fungus attacks the stem at the nodal region, causing shredding of the bark. In mature plants, necrotic lesions on the leaves appear at the apex and along their margins. Pycnidia are formed on […]
DISEASES CAUSAL ORGANISM Seedling blight Phytophthora parasitica Rust Melampsora ricini Leaf blight Alternaria ricini Brown leaf spot Cercospora ricinicola Bacterial leaf blight Xanthomonas campestris pv. ricini 1. SEDLING BLIGHT – Phytophthora parasitica Symptoms The disease appears as circular, dull green patch on both the surface of the cotyledonary leaves. Later it spreads and cause rotting. […]
1. LEAF CURL – Tomato spotted wilt virus [TSWV] Symptoms The infection starts as chlorosis of lateral veins near the leaf margins and margins slowly curl downwards. The infected leaves are brittle and plants produce a few small and malformed pods. Vector The disease is transmitted by Thrips viz., – Frankliniella schultzi, Thrips tabaci and […]
DISEASES OF SORGHUM DISEASES CAUSAL ORGANISM Charcoal rot Macrophomina phaseolina Downy mildew / leaf shredding Perenosclerospora sorghi Rust Puccinia purpurea Grain smut / kernal smut / covered smut Sporisorium sorghi Loose smut Sporisorium cruenta Long smut Tolyposporium ehrenbergii Head smut Sporisorium reiliana Ergot / sugary disease Claviceps sorghi Leaf blight Helminthosporium turcicum Rectangular leaf spot […]
BHENDI Shoot and fruit borer Earias vittella, E. insulana (Noctuidae: Lepidoptera) It is commonly known as cotton spotted bollworm and a major pest of bhendi. It is infesting okra, cotton and other malvaceous wild and cultivated plants. Summer bhendi suffers heavily by this pest, after which, it migrates to cotton. Caterpillars bore into tender shoots […]
BRINJAL Shoot and fruit borer Leucinodes orbonalis (Pyraustidae: Lepidoptera) Leucinodes orbonalis is the most important and destructive pest of brinjal. It starts damaging brinjal plant, few weeks after transplantation. Larva bores into tender shoots and causes withering of terminal shoots or dead hearts. It also bores into petioles of leaves, flower buds and developing fruits […]
PESTS ON SESAME Til Leaf and Pod Caterpillar, Antigastra catalaunalis Lepidoptera: Pyralidae A serious and regular pest. Young caterpillars feed on leaves. They also bore into the shoots, flowers, buds and pods. An early attack kills the whole plant, but infestation of the shoots at a later stage hampers further growth and flowering. The maximum […]
BELLADONA Cut worm, Agrotis flammetra (Noctuidae: Lepidoptera) Leaf feeder, Archipsinca ceana SENNA Green leaf eating caterpillar, Catopsilia pyranthe Pierdae Lepidoptera Pod borer, Etiella zinckenella Phycitidae Lepidoptera LONG PEPPER Mealy bug, Dysmicoccus sp. (Pseudococcidae: Hemiptera) Tea mosquito bug, Helopeltis theivora (Miridae: Hemiptera) MEDICINAL YAMS Aphids, Aphids gossypii, Pentalonia nigronervosa (Aphididae: Hemiptera) Red spider mite, Tetranychus sp […]
PESTS OF LILY Leaf caterpillar Polytela gloriosa Noctuidae : Lepidoptera Adult – brown with yellow and red markings. Larva -leaf feeder PESTS OF NERIUM Sphingid caterpillar Deilephila nerii Sphingidae : Lepidoptera Adult: Robust, green moth with yellow markings Leaf butterfly Euploea core Danaidae : Lepidoptera Larva: Blackish brown, […]
PESTS OF JASMINE Budworm, Hendecasis duplifascialis Hmpsn Pyraustidae Lepidoptera Caterpillar makes hole on the flower bud and feeds on the inner content. Larva also attacks 2 -3 buds and buds are webbed together by silken threads. Adult is a small white moth with black palpi and three lines on the abdomen and hind legs. Larva […]
PESTS OF TEA Tea mosquito bug, Helopeltis theivora Miridae – Hemiptera Adults and nymphs suck the sap from buds, young leaves and tender stems by puncturing the plant tissues with needle like stylets and inject toxic saliva. These punctures appear as reddish brown spots. Due to intensive feeding, leaves curl up, become badly deformed and […]
PESTS OF COFFEE White stem borer Xylotrechus quadripes Cerambycidae: Coleoptera White stem borer is the most serious pest of Arabica coffee in India. Alternate host plants include Robusta tree coffee, teak, Oleadioica etc. However, borer usually does not breed in these plants. Adult is slender and 2.5 cm long beetle. Forewings are black with white […]
PEPPER Pollu beetle, Longitarsus nigripennis (Alticidae: Coleoptera) This is the most important pest in West coast area. It causes 30 to 40 percent loss in yield of pepper. Grub feeds on growing tip, tender stem, leaf petiole, spikes and berry. Tunneling of tender stem causes drying up of shoot. Portions of spikes tunneled by grubs […]