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Sharma, Pawan K.
- Seasonal Abundance of Sucking Insect and Mite Pests Infesting Okra under Mid-Hill Conditions of Himachal Pradesh
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Authors
Affiliations
1 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062, IN
1 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062, IN
Source
Himachal Journal of Agricultural Research, Vol 45, No 1&2 (2019), Pagination: 57-61Abstract
The studies on seasonal abundance of sucking insect and mite pests infesting okra were undertaken at CSKHPKV, Palampur and farmers' field at Samloti during kharif 2018. The activity of two sucking pests i.e., aphid, Aphis gossypii and jassid, Amrasca biguttula biguttula on okra at Palampur initiated during second and third week of July, respectively and the pests remained associated with the crop till harvest i.e. third week of October. The peak population of A. gossypii (101.3aphids/plant) and A. biguttula biguttula (7.2 jassids/plant) was observed during second week of October and fourth week of August, respectively. Whereas, at Samloti the population of A. gossypii, A. biguttula biguttula and Tetranychus urticae started appearing during first week of June and the peak population of 64.4 aphids per plant was recorded during third week of September. The maximum number of jassids per plant (18.6) was observed during last week of August and T. urticae remained on okra crop for a short period having peak population of 11.2 mites per plant during second week of June. Analysis of correlation between weather factors and population of sucking pests on okra at Palampur showed that population of A. gossypii had a significant negative correlation with minimum temperature (r = -0.6545) and relative humidity (r = -0.7646). At Samloti, maximum temperature had significant negative effect on A. gossypii (r = -0.6040) and A. biguttula biguttula (r = -0.5144).Keywords
Okra, Aphis gossypii, Amrasca biguttula biguttula, Tetranychus urticae, Weather Parameters and Seasonal Abundance.Full Text
References
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Authors
Affiliations
1 Department of Entomology, College of Agriculture CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN
1 Department of Entomology, College of Agriculture CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN
Source
Himachal Journal of Agricultural Research, Vol 48, No 01 (2022), Pagination: 139-141Abstract
The predation potential of grub and adult of Coccinella septempunctata (Linn.) was studied under laboratory conditions, in Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, Himachal Pradesh, India. The studies revealed that the duration of the 1st, 2nd, 3rd, 4th larval stage, pupae and adult of C. septempunctata was 2.0±0.71, 4.60±0.55, 4.80±0.84, 6.00±1.58, 4.20±0.84 and 38.80±1.66 days, respectively and the aphid consumption per day was 16.00, 16.19, 21.44, 18.55 and 36.80 aphids, respectively. The total number of aphids consumed during 1st, 2nd, 3rd, 4th and adult of C. septempunctata were 33.6, 72.6, 103.0, 112.0 and 1424.6, respectively.Keywords
Coccinella septempunctata, aphids, predation potential, coccinellidsFull Text
References
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