Eppo, bolls of up to 6 weeks of age are vulnerable butani. Pink bollworm national invasive species information center usda. At district sahiwal article pdf available january 2007 with 326 reads. Live simple, live free tinyhouse prepper recommended for you. Sep 26, 2016 there are three kinds of bollworms, viz.
In the present study, the effect of an extract of azadirachtin indica in different solvents on second instar larvae of e. Fundamental of horticulture fundamental of horticulture pdf download area production and export entomology insectpests pdf download march 31. Spotted bollworm, earias vittella, is one of the most serious and devastating insect pests of vegetables and cotton. Introduction identification damage management spray 1. Infestations in the united states first occurred in texas cotton in 1917. The pink bollworm, pectinophora gossypiella saunders, was described by w. The larvae have a habit of moving from boll to boll and damage much more than what they actually consume. Mar 12, 2020 control of cotton spotted bollworm earias fabia s in baroda. Forewing bright applegreen with paler longitudinal streaks, the anterior third of the wing pale applegreen often tinged with pink.
Know your cotton insect pest spotted and spiny bollworms. Any of several moth caterpillars that feed on cotton bolls, especially the pink bollworm and the corn earworm. Effect of the chemosterilant bisazir on the testes of the. Spotted and spiny bollworms thipkyachi, kateri bond ali earias vittella fab. A bibliography of the pink bollworm, pectinophora gossypiella saunders pdf 1. Comparative study on oviposition and larval preference of. Maintenance of host free period during offseason is a must to ensure a pink boll worm free next. Larval survival and postembryonic development of the spotted bollworm,earias vittella was studied on 23 genotypes belonging to three cultivated species of cotton gossypium arboreum, g.
We found no significant differences in spotted bollworm egg density between bt and conventional cotton but larval density. Eggs are spherical, flattened, with 10 to 15 perpendicular rows of toothed ribs. Morphological basis of resistance to spotted bollworm, earias vittella fabricius in asiatic cotton. Presentations ppt, key, pdf logging in or signing up. The pest feeds on alternative host plants like hibiscus, holyhock, sunhemp, china rose, bhendi, pundi, abutilon indicum etc. Significant reductions in dna, rna, protein and alkaline phosphatase activity and an enhancement in total free amino acids and acid phosphatase activity have been observed. Pdf life table of spotted bollworm, earias vittella on okra. The larval survival varied from 271 to 933%, developmental period. Biological control of pink bollworm free from excretory pellets frass. Larvae range from olive green to dark reddish brown in color and can be best. Seasonal pattern of infestation by spotted bollworm, earias.
There were substantial differences in bollworm damage and larval population in different genotypes. Identification damage life cycle management download pdf. Bollworm, any larvae of various moths order lepidoptera, including the pink bollworm pectinophora gossypiella, family gelechiidae and some helicoverpa species. Nov 27, 2018 spotted bollworm, earias vittella fab, is an agricultural cotton pest. While these larvae are mostly known for the damage they inflict on cotton bolls, a variety of plants are attacked by bollworms, including peas, alfalfa, beans, soybeans, flax, peanuts, and other commercial crops. It is a chewing insect pest of cotton that causes great economic loss to. Seasonal pattern of infestation by spotted bollworm. While these larvae are mostly known for the damage they inflict on cotton bolls, a variety of plants are attacked by bollworms. Lethal and sublethal effects of azadirachtin indica seed. The susceptibility of 23 cotton genotypes to spotted bollworm, earias vittella, was studied under natural infestation during 1977 and 1978 rainy season at delhi, india. Available formats pdf please select a format to send. Hamed and nadeem, 2010, because of damage to flowers, squares and bolls gore et al.
Egg female pink bollworm moths lay eggs singly or, more commonly, in small groups. Spotted bollworms are major pests of cotton in india and ae found wherever cotton is grown. Sidhu and sandhu, when attacking the fruit, the larvae feed on the milky seeds and other contents of the pod, leaving excrementfilled tunnels. Chemical control of spotted bollworm in cotton agropedia. Head, thorax and legs pale applegreen, whitish beneath. Newly hatched, firstinstar larvae have several rows of dark tubercles along the back, each bearing one or two bristles. The time required from egg to egg varies because of temperature and other conditions but generally is about one month during the summer months. Pdf mating, oviposition and gamma sterilization of the. Pink bollworm national invasive species information center.
There were significant differences in larval survival and postembryonic development on different genotypes. Enters into a summer diapause when irrigated crops are not present and the soil and air temperatures are high. There were substantial differences in the number of eggs laid on different genotypes. Pectinophora gossypiella saunders gelechiidae contactsgo to all. The susceptibility of 23 cotton genotypes to spotted bollworm. Among the three, the spotted bollworms occurs early, when the plant is 1520 cm height and continues to feed on shoot. Spotted bollworm more than 1o % of attacked fruiting bodies american bollworm 10 % infested fruiting bodies or one egg or larva per plant pink bollworm more than 10 % attacked bolls or flowers 12. Saunders in 1843 as depressaria gossypiella from specimens found to be damaging cotton in india. Bollworm is the common term for a moth larva that attacks the fruiting bodies of certain crops, especially cotton. Pdf sublethal effects of lufenuron exposure on spotted. Free phenols showed negative, but lower correlation coefficients with bollworm damage.
Among the bollworm complex, the pink bollworm pectinophora gossypiella saund. In india earias insulana is noticed in northern part of the country whereas e. Bollworms article about bollworms by the free dictionary. Therefore, effective measures of preventing pink bollworm damage include postharvest, offseason and preplanting actions. Noctuidae lepidoptera borer technology mission on cotton mini mission i 3. Effect of total gossypol concentration on spotted bollworm earias.
The other two occur from square formation stage, and pink bollworm continues till picking of kapas and goes even to ginning mills. Currently, insecticides are necessary for its control in nearly all crop systems. Spotted, spiny bollworm central institute for cotton research. The cotton ecosystem is endowed with rich fauna of natural enemies. Maintenance of host free period during offseason is an essential option to ensure a pink bollworm free next cotton season. The pest feeds on alternative host plants like hibiscus, holyhock. Oviposition behaviour of spotted bollworm, earias vittella. The oviposition behaviour of spotted bollworm, earias vittella fab. Noctuidae in relation to consumption, nutritive value and utilization of food from various plants.
Introduction identification life cycle damage management download pdf. May 08, 2019 helicoverpa armigera hubner or old world bollworm owb can affect 180 species of wild and cultivated plants in more than 45 families. Flaring up of bracts during square and young boll formation stage. Spotted bollworm in cotton present in many old world cotton growing areas. Studies indicate a time dependent action of bisazir on nucleic acids, proteins, amino acids and phosphatases in the testes of the spotted bollworm earias fabia.
In pakistan, earias vittella fab has developed resistance to various groups of insecticides. Biological parameters of pink bollworm pectinophora. The larval survival varied from 271 to 933%, developmental. Integrated management approaches for pink bollworm in the southwestern united states. Drying and drooping of terminal shoots during preflowering stage. A window of opportunity the pink bollworm is a very destructive cotton insect pest. Until recently, scouting to detect infestations of pink spotted bollworms depended on boll sampling and dissection. The pink bollworm pink bollworm, destructive larva of a moth, pectinophora gossypiella. The toxin expression differs in different tissues, and the insect pests can avoid the tissues that contain higher amount of toxins or select low toxin or toxin free tissues. Factors affecting genotypic susceptibility to spotted. Mar 11, 2012 spotted bollworms are major pests of cotton in india and ae found wherever cotton is grown. Pink bollworms emerging from a damaged cotton boll peggy greb, usda.
When the end of the dry season comes, the rain cools the soil and pupae come out of diapause. Even large sized bolls are eaten up by the grown up larvae. Fundamental of horticulture pdf download area production and export. Pink bollworm national invasive species information. Egg adult larva pupae egg hatches in one week grows in 1214 days 1821 days pupal period lays 200400 eggs on leaves in winter, the life cycle is greatly prolonged 7. Probably of native american origin, it is a serious pest of cotton in the s united states, chiefly along the mexican border. Uc management guidelines for cotton bollworm on cotton.
Bollworms definition of bollworms by the free dictionary. United states a bibliography of the agriculture pink bollworm. Both wings are whitish in colour, green coloured band present at each f. Incidence of spotted bollworm, earias vittella larvae the results of the study on incidence of e. Mating, oviposition and gamma sterilization of the spotted bollworm of cotton, earias insulana. Effect of some antibiotic compounds in cotton on post. It is a chewing insect pest of cotton that causes great economic loss to cotton crops. A transgenic bt cotton line irfh901 carrying cry1ac toxic gene from bacillus thuringiensis was evaluated for resistance against spotted bollworm earias insulana boisd. United states a bibliography of the agriculture pink.
Biological control of spiny bollworms spotted bollworm, earias fabia lepidoptera. We found no significant differences in spotted bollworm egg density between bt and conventional cotton but larval. Subsequently, a hearnpv product, helicovir river bioscience, south africa, was registered for use against bollworm on citrus among other crops in south africa moore and kirkman, 2010. Oviposition behaviour of spotted bollworm, earias vittella fab. Red or sudan bollworm, diparopsis castanea rough bollworm, earias perhuegeli spotted bollworm, earias fabia spotted bollworm, earias vittella american cotton bollworm or tomato grub, helicoverpa armigera. Spotted bollworm, earias vittella fab, is an agricultural cotton pest. Identification damage life cycle management click here. Impact of environmental resistance factors on abundance of.
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