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Mustard [Brassica juncea (Linneaus) Czern and Coss] is an important oilseed crop extensively grow... more Mustard [Brassica juncea (Linneaus) Czern and Coss] is an important oilseed crop extensively grown in India. It is usually rich in oil content (40%) and provides good source of edible oil. Near about 38 insect pests are known to be associated with rapeseed-mustard crop in India (Bakhetia and Sekhon, 1989. Among them, aphid, Lipaphis erysimi (Kaltenbach) is known to be a key pest and caused 69.61 per cent loss in yield (Singh and Sachan, 1994). For the management of this key pest, growers generally reliance on the use of insecticides which creates undesirable problems such as residues, development of resistance in pest to insecticides, resurgence, environmental pollution, toxic effects on natural enemies etc. To such as adverse effects, the identification and use of resistance/tolerant varieties is considered as best alternative for the management of the pest A field experiment was conducted to see the relative susceptibility of different mustard genotypes/varieties against aphid und...

The study on survey and surveillance was carried out on the occurrence of insect pests and their ... more The study on survey and surveillance was carried out on the occurrence of insect pests and their natural enemies on aonla in middle Gujarat region for three years 2002-05. The major pests recorded were Betousa stylophora Swinhoe, Gracillaria acidula (Meyrick), Selepa celtis Moore and Indarbela tetraonis Moore belonging to the order Lepidoptera, Cerciaphis emblica Patel and Kulkarni, Nipaecoccus vastator (Maskell) and Oxyrhachis tarandus Fabricius of Homoptera, the Myllocerus discolor Boheman of Coleoptera and termite, Odontotermes spp. of Isoptera. Among the natural enemies, two species of coccinellid beetles viz., Cheilomenes (Menochilus) sexmaculata Fabr. and Coccinella septempunctata Linn., feeding on aphid and other sucking pests during April to November, four species of spiders (Neoscona sp., Peucetia sp., Argiope sp. and Oxyopes sp.) feeding on mealy bugs throughout the year as well as mantids were found preying on different pests of aonla during March to November, except firs...

The impact of two insecticides were evaluated on the activity of Campoletis chloridae Uchida, a p... more The impact of two insecticides were evaluated on the activity of Campoletis chloridae Uchida, a potential arval parasitoid of Helicoverpa armigera (Hubner) Hardwick for two years during 201-12 and 2012-13 at Colege Agronomy farm, B.A. Colege of Agriculture, AAU, Anand. The schedule based aplication of lubendiamide 480 SC @ 0.01 per cent was relatively safer to this parasitoid and recorded higher per cent parasitsm (19.47) in chickpea ecosystem.

A new species Urentius echinus (Distant) (Family: Tingidae), commonly known as lacewing bug or br... more A new species Urentius echinus (Distant) (Family: Tingidae), commonly known as lacewing bug or brinjal tingid, a hemipteran pest was found feeding on brinjal for first time in middle Gujarat. The adults of brinjal lace wing bug, U. echinus are small with brown colour wings; head, thorax and abdomen is black in colour; about 3 mm long, whereas nymph is pale yellow with prominent spines present on the body; about 2 mm long. The pest is observed on the plants in congregated form and both adults and nymphs sap from the leaves, the former feeding on the upper and the latter were crowded on lower surface of leaves. As a result, small chlorotic spots appeared on the upper surface of infested leaves. Later on, extensive chlorotic areas were observed due to extensive feeding by the nymphs. Severely attacked leaves turned white and yellow, ultimately withering and falling off.

Pestology

The field experiment was conducted in two consecutive crop seasons during summer and kharif, 2012... more The field experiment was conducted in two consecutive crop seasons during summer and kharif, 2012 on okra to manage the yellow vein mosaic virus disease transmitted by Bemisia tabaci Gennadius by insecticidal applications strategies i.e. schedule base and need base along with different doses of thiamethoxam 25 WG and dimethoate 30 EC as well as computing their cost benefit ratio for proper fit in IPM strategies. In comparison to dimethoate 30 EC, thiamethoxam 25 WG on concentration base (0.0125%) applied on schedule base (first spray on appearance of pest and subsequently five sprays at ten days interval) found effective by recording less whitefly population as well as yellow vein mosaic virus disease. The highest fruit yield of 79.83 q/ ha was realized in thiamethoxam 25 WG @ 0.0125% applied on schedule base treatment with higher Net Insecticidal Cost Benefit Ratio (NICBR) of 1: 8.68.

The natural enemies of genus Procontarinia, mainly P. matteiana, include a number of parasitic hy... more The natural enemies of genus Procontarinia, mainly P. matteiana, include a number of parasitic hymenoptera. The platygastrids were subjected to a study by Austin (1984). The new parasitic species associated with mango pests, especially P. matteiana in Gujarat (India), is Ormyrulus gibbus (Boucek) (Hymenoptera: Orymyridae). Earlier, this species was recorded in Andhra Pradesh, Karnataka and Uttar Pradesh (Anon., 2013).

To standardize number of pheromone traps required for mass trapping of Helicoverpa armigera (Hubn... more To standardize number of pheromone traps required for mass trapping of Helicoverpa armigera (Hubner) Hardwick in pigeon pea [Cajanus cajan (Linnaeus) Millspaugh], an experiment was carried out on farmer's field located at village Sitapara in Savli taluka of Vadodara district during rabi 2011-12 and at villages Jitodia and Navli in taluka and district Anand during rabi 2012-13. Pheromone traps @ 30, 40 & 50 /ha was installed. Five plants were selected randomly in each quadrate and observations on population of eggs and larva as well as damage to pods were recorded on 2 randomly selected twigs (each of 15 cm length) per plant. The highest moth catches (9630 during first year and 11272 during second year with an average of 10451 per ha) were recorded in the plots installed with 50 traps /ha. Further, the pigeon pea crop having treatment of 50 traps /ha recorded the lowest population of eggs (3.95 /twig) and larvae (2.89 /twig) as well as per cent pod damage (7.96) and found signifi...

Muskmelon (Cucumis melo L.) is a species of melon belongs to family Cucurbitaceae. Nysius ericae ... more Muskmelon (Cucumis melo L.) is a species of melon belongs to family Cucurbitaceae. Nysius ericae (Schilling) (Lygaeidae), a hemipteran pest was found feeding on muskmelon for the first time. Locally, it is also known as False Chinch Bug. The adults of false chinch bug, N. ericae are a small, about 1/8 inch long. Nymph is pale gray with reddish brown abdomen (Ebeling and Pence, 1952). The pest sucked the sap from the foliage or flower buds (Milliken, 1918).

A study on impact of sowing periods on incidence of aphid, Uroleucon compositae Theobald in Bhima... more A study on impact of sowing periods on incidence of aphid, Uroleucon compositae Theobald in Bhima variety of safflower, Carthamus tinctorius L. was carried out during the years 2008-09. The peak activity of aphid was recorded during 12 th (45.83/ 10 cm twig), 11 th (52.95), 13 th (166.15) and 10 th (67.48) weeks after sowing in the crops sown during 1 st week of October, 3 rd week of October, 1 st week of November and 3 rd week of November, respectively while the crop sown during 1 st and 3 rd week of December showed peaks of 140.35 and 139.80 aphids/ 10 cm twig during the 5 th week after sowing. The crop sown during 1 st and 3 rd week of October suffered less from this pest. Moreover, there was no significant role of weather parameters on incidence of aphid except for the crop sown during the 1 st week of December in which pest was significantly and negatively correlated with maximum temperature (r = -0.9974).

Mustard [Brassica juncea (Linneaus) Czern and Coss] is an important oilseed crop extensively grow... more Mustard [Brassica juncea (Linneaus) Czern and Coss] is an important oilseed crop extensively grown in India. It is usually rich in oil content (40%) and provides good source of edible oil. Near about 38 insect pests are known to be associated with rapeseed-mustard crop in India (Bakhetia and Sekhon, 1989. Among them, aphid, Lipaphis erysimi (Kaltenbach) is known to be a key pest and caused 69.61 per cent loss in yield (Singh and Sachan, 1994). For the management of this key pest, growers generally reliance on the use of insecticides which creates undesirable problems such as residues, development of resistance in pest to insecticides, resurgence, environmental pollution, toxic effects on natural enemies etc. To such as adverse effects, the identification and use of resistance/tolerant varieties is considered as best alternative for the management of the pest A field experiment was conducted to see the relative susceptibility of different mustard genotypes/varieties against aphid und...

The study on survey and surveillance was carried out on the occurrence of insect pests and their ... more The study on survey and surveillance was carried out on the occurrence of insect pests and their natural enemies on aonla in middle Gujarat region for three years 2002-05. The major pests recorded were Betousa stylophora Swinhoe, Gracillaria acidula (Meyrick), Selepa celtis Moore and Indarbela tetraonis Moore belonging to the order Lepidoptera, Cerciaphis emblica Patel and Kulkarni, Nipaecoccus vastator (Maskell) and Oxyrhachis tarandus Fabricius of Homoptera, the Myllocerus discolor Boheman of Coleoptera and termite, Odontotermes spp. of Isoptera. Among the natural enemies, two species of coccinellid beetles viz., Cheilomenes (Menochilus) sexmaculata Fabr. and Coccinella septempunctata Linn., feeding on aphid and other sucking pests during April to November, four species of spiders (Neoscona sp., Peucetia sp., Argiope sp. and Oxyopes sp.) feeding on mealy bugs throughout the year as well as mantids were found preying on different pests of aonla during March to November, except firs...

The impact of two insecticides were evaluated on the activity of Campoletis chloridae Uchida, a p... more The impact of two insecticides were evaluated on the activity of Campoletis chloridae Uchida, a potential arval parasitoid of Helicoverpa armigera (Hubner) Hardwick for two years during 201-12 and 2012-13 at Colege Agronomy farm, B.A. Colege of Agriculture, AAU, Anand. The schedule based aplication of lubendiamide 480 SC @ 0.01 per cent was relatively safer to this parasitoid and recorded higher per cent parasitsm (19.47) in chickpea ecosystem.

A new species Urentius echinus (Distant) (Family: Tingidae), commonly known as lacewing bug or br... more A new species Urentius echinus (Distant) (Family: Tingidae), commonly known as lacewing bug or brinjal tingid, a hemipteran pest was found feeding on brinjal for first time in middle Gujarat. The adults of brinjal lace wing bug, U. echinus are small with brown colour wings; head, thorax and abdomen is black in colour; about 3 mm long, whereas nymph is pale yellow with prominent spines present on the body; about 2 mm long. The pest is observed on the plants in congregated form and both adults and nymphs sap from the leaves, the former feeding on the upper and the latter were crowded on lower surface of leaves. As a result, small chlorotic spots appeared on the upper surface of infested leaves. Later on, extensive chlorotic areas were observed due to extensive feeding by the nymphs. Severely attacked leaves turned white and yellow, ultimately withering and falling off.

Pestology

The field experiment was conducted in two consecutive crop seasons during summer and kharif, 2012... more The field experiment was conducted in two consecutive crop seasons during summer and kharif, 2012 on okra to manage the yellow vein mosaic virus disease transmitted by Bemisia tabaci Gennadius by insecticidal applications strategies i.e. schedule base and need base along with different doses of thiamethoxam 25 WG and dimethoate 30 EC as well as computing their cost benefit ratio for proper fit in IPM strategies. In comparison to dimethoate 30 EC, thiamethoxam 25 WG on concentration base (0.0125%) applied on schedule base (first spray on appearance of pest and subsequently five sprays at ten days interval) found effective by recording less whitefly population as well as yellow vein mosaic virus disease. The highest fruit yield of 79.83 q/ ha was realized in thiamethoxam 25 WG @ 0.0125% applied on schedule base treatment with higher Net Insecticidal Cost Benefit Ratio (NICBR) of 1: 8.68.

The natural enemies of genus Procontarinia, mainly P. matteiana, include a number of parasitic hy... more The natural enemies of genus Procontarinia, mainly P. matteiana, include a number of parasitic hymenoptera. The platygastrids were subjected to a study by Austin (1984). The new parasitic species associated with mango pests, especially P. matteiana in Gujarat (India), is Ormyrulus gibbus (Boucek) (Hymenoptera: Orymyridae). Earlier, this species was recorded in Andhra Pradesh, Karnataka and Uttar Pradesh (Anon., 2013).

To standardize number of pheromone traps required for mass trapping of Helicoverpa armigera (Hubn... more To standardize number of pheromone traps required for mass trapping of Helicoverpa armigera (Hubner) Hardwick in pigeon pea [Cajanus cajan (Linnaeus) Millspaugh], an experiment was carried out on farmer's field located at village Sitapara in Savli taluka of Vadodara district during rabi 2011-12 and at villages Jitodia and Navli in taluka and district Anand during rabi 2012-13. Pheromone traps @ 30, 40 & 50 /ha was installed. Five plants were selected randomly in each quadrate and observations on population of eggs and larva as well as damage to pods were recorded on 2 randomly selected twigs (each of 15 cm length) per plant. The highest moth catches (9630 during first year and 11272 during second year with an average of 10451 per ha) were recorded in the plots installed with 50 traps /ha. Further, the pigeon pea crop having treatment of 50 traps /ha recorded the lowest population of eggs (3.95 /twig) and larvae (2.89 /twig) as well as per cent pod damage (7.96) and found signifi...

Muskmelon (Cucumis melo L.) is a species of melon belongs to family Cucurbitaceae. Nysius ericae ... more Muskmelon (Cucumis melo L.) is a species of melon belongs to family Cucurbitaceae. Nysius ericae (Schilling) (Lygaeidae), a hemipteran pest was found feeding on muskmelon for the first time. Locally, it is also known as False Chinch Bug. The adults of false chinch bug, N. ericae are a small, about 1/8 inch long. Nymph is pale gray with reddish brown abdomen (Ebeling and Pence, 1952). The pest sucked the sap from the foliage or flower buds (Milliken, 1918).

A study on impact of sowing periods on incidence of aphid, Uroleucon compositae Theobald in Bhima... more A study on impact of sowing periods on incidence of aphid, Uroleucon compositae Theobald in Bhima variety of safflower, Carthamus tinctorius L. was carried out during the years 2008-09. The peak activity of aphid was recorded during 12 th (45.83/ 10 cm twig), 11 th (52.95), 13 th (166.15) and 10 th (67.48) weeks after sowing in the crops sown during 1 st week of October, 3 rd week of October, 1 st week of November and 3 rd week of November, respectively while the crop sown during 1 st and 3 rd week of December showed peaks of 140.35 and 139.80 aphids/ 10 cm twig during the 5 th week after sowing. The crop sown during 1 st and 3 rd week of October suffered less from this pest. Moreover, there was no significant role of weather parameters on incidence of aphid except for the crop sown during the 1 st week of December in which pest was significantly and negatively correlated with maximum temperature (r = -0.9974).