International Journal of Plant Protection

S. R. Patel ¹, H. V. Pandya ², S. D. Patel ¹, M. M. Naik ¹

Affiliations
1 Department of Entomology, N.M. College of Agriculture, Navsari Agricultural University, Navsari Gujarat, IN
2 Department of Entomology, N.M. College of Agriculture, Navsari Agricultural University, Navsari Gujarat

Abstract

Studies on biology of Bombyx mori L. (Lepidoptera: Bombycidae) on mulberry plant showed that the silkworm moth laid the eggs which were singly coated with gummy substance, ellipsoidal in shape and dull white in colour under the laboratory condition. The average incubation period and hatching percentage were 8.32 ± 1.179 days and 91.60 ± 5.317 per cents, respectively. The larvae passed through five instars. The average larval period was 24.44 ± 1.509 days while pupal weight and duration varied from 0.622 ± 0.052 g and 12.54 ± 1.22 days, respectively. Shell weight varied from 0.105 ± 0.022 g. The average pre-oviposition, oviposition and postoviposition periods were, 0.43 ± 0.028, 2.30 ± 0.483 and 3.50 ± 0.527 days, respectively. The average fecundity of the female was 269 ± 30.21 eggs during entire life span. The average longevity of male and female moth was, 5.60 ± 0.699 and 6.23 ± 0.431 days, respectively. The life span of female was found to be relatively more than male moth.

Keywords

bombyx Mori, Mulberry Plant, Biology

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S. M. Patel ¹, G. G. Radadia ¹, H. V. Pandya ¹, S. D. Patel ¹, P. P. Dave ¹

Affiliations
1 Department of Entomology, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, NAVSARI (GUJARAT), IN

Abstract

Investigation on comparative biology of green lace wing, Chrysoperla zastrowi arabica Henry et al. (Neuroptera : Chrysopidae) was carried out in the Bio-control Laboratory, Navsari Agricultural University, Navsari, Gujarat during 2007 to 2009. The results on comparative biology of C. zastrowi arabica on two aphid species viz., Aphis gossypii Glower and Myzus persicae (Sulzer) revealed that average duration of total developmental period was 18.70 ± 0.64 and 18.93 ± 0.55 days when reared on A. gossypii, and M. persicae, respectively. The egg laying capacity of C. zastrowi arabica was recorded 754.25 ± 143.47 and 601.75 ± 89.43 eggs when reared on A. gossypii and M. persicae, respectively. Study on predatory potential of C. zastrowi arabica revealed that single larva consumed an average of 627.60 ± 42.39 and 587.5 ± 55.59 numbers (nymphs and adults) of A. gossypii and M. persicae, respectively

Keywords

Green lace wing, Comparative biology, Predatory potential.

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S. A. Darandale ¹, H. V. Pandya ², S. D. Patel ¹, S. M. Patel ²

Affiliations
1 Department of Entomology, Navsari Agricultural University, NAVSARI (GUJARAT), IN
2 Department of Entomology, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, NAVSARI (GUJARAT), IN

Abstract

Investigations were carried out on population dynamics of major insect pests on niger (Guizotia abyssinica L.) at College Farm, Navsari Agricultural University, Navsari during winter 2011-12. For the purpose, 20 plants were randomly selected from an experimental area of 20×20 m. Observations were recorded at weekly interval. For recording the population of aphid (Uroleucon compositae), jassid (Amrasca biguttula biguttula), and whitefly (Bemisia tabaci), three leaves from top, middle and bottom portion of the randomly selected plants were critically observed and number of aphids, jassids and whiteflies were counted and population per leaf was worked out. The data on population of sucking pests was correlated with weather parameters viz., maximum, minimum and average temperature, morning, evening and average humidity, sunshine hours, wind velocity and evaporation. The results revealed that the incidence of sucking pests viz., aphid, Uroleucon compositae (Theobald) started from second week of December which reached peak (63.20 aphids/leaf) during first week of February. The incidence of jassid, Amrasca biguttula biguttula (Ishida) started from second week of December with a peak (8.52 jassids/ leaf) during fourth week of January and thereafter, steadily declined and finally disappeared. Whereas, whitefly, Bemisia tabaci (Gennadius) started from second week of December with a maximum level during (14.56 whiteflies/leaf) fourth week of January. Among various weather parameters viz., maximum, minimum and average temperature had highly significant negative influence on the population of all the major sucking insect pests of niger.

Keywords

Niger, Correlation, Abiotic Factors, Weather Parameters.

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K. Swathi Yadav ¹, H. V. Pandya ¹, S. M. Patel ¹, S. D. Patel ¹, M. M. Saiyad ¹

Affiliations
1 Department of Entomology, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, NAVSARI (GUJARAT), IN

Abstract

Investigations were carried out on population dynamics of major insect pests that attack cowpea [Vigna ungiculata (L.) Walp.] at Regional Horticultural Research Station, Navsari Agricultural University, Navsari during 2012-13. The results revealed that aphid and jassid population started from 3^rd week of October, reached a peak of 3.4 aphid index and 3.8 jassids/ leaf by 1^st week of December whereas whitefly population started from 3^rd week of October and reached to a peak level of 3.7 whiteflies per leaf in 4^th week of November. Cowpea pod borer population started in 2^nd week of November and reached to a peak level (2.8 larvae/plant) in 1^st week of December and thereafter, decreased gradually. Spotted pod borer population started from 1^st week of November coinciding with the flower initiation and reached to a peak of 2.8 larvae per leaf in 1st week of December. Among various weather parameters, evening relative humidity showed a significantly negative influence on population of almost all pests and minimum temperature showed a significantly negative correlation with aphid, cowpea pod borer and ladybird beetle population.

Keywords

Cowpea, Population Dynamics, Aphid, jassid, Whitefly, Pod Borer.

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S. G. Parmar ¹, M. M. Naik ¹, H. V. Pandya ², N. K. Rathod ¹, S. D. Patel ¹, P. P. Dave ¹, M. M. Saiyad ¹

Affiliations
1 Department of Entomology, N.M. College of Agriculture, Navsari Agricultural University, NAVSARI (GUJARAT), IN
2 Department of Entomology, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, NAVSARI (GUJARAT), IN

Abstract

An investigation was carried out on bio-efficacy of newer insecticides against pest complex of blackgram [Vigna mungo (L.)] at Navsari Agricultural University, Navsari, Gujarat during Kharif season. Among the tested eleven insecticide, the higher effectiveness was observed with the application of clothianidin 50 per cent WDG (0.003%) against whitefly, jassid and aphid. While, spinosad 2.5 SC (0.002%) was the most effective against gram pod borer and spotted pod borer.

Keywords

Bio Efficacy, Insecticides, Blackgram, Whitefly, Jassid, Aphid, Gram Pod Borer, Spotted Pod Borer.

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