Insect Pests of Okra and Their Management (original) (raw)
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The Journal of Plant Protection Sciences, 2013
belonging to the family Malvaceae, is a popular and commercially cultivated vegetable crop of tropical and subtropical parts of the world. India ranked first in okra production in the World and major okra producing Indian states are Uttar Pradesh, Bihar, Orissa, West Bengal, Andhra Pradesh, Karnataka and Assam (1). Okra fruit is very rich in fats, carbohydrates, vitamins like A & B vitamins and minerals such as calcium, iron, magnesium and potassium (2). Apart from these, the fruit is very useful against genito-urinary disorders, spermatorrhoea and chronic dysentery (7). The average production of okra in India is about 57.84 lakh tons and productivity 11.6 tons/ha during 2010-11 (1). H o w e v e r , o ne of the major constraints for okra production is heavy infestations caused by several insect pests which not only exert quantitative loss but also qualitative loss to the crop. As many as 72 insect species have been recorded on okra (9). The occurrence and intensity of damage caused ...
Integrated pest management of Okra insect pests
International Journal of Fauna and Biological Studies, 2017
Field study on integrated pest management of Okra insect pests was carried out at experimental area of Faculty of Crop Protection, Sindh Agriculture University, Tandojam during the year 2016. The okra crop variety Rama Krishma was sown on RCBD with three replications by drilling method along agronomical practices. The results revealed that the reduced pest population of jassid, aphid and white fly after different IPM treatments on okra crop except control. Treatments were applied T1 (Biosal applications), T2 (Tobacco extract application), T3 (Natural enemies) T4 (Conventional farming practices) and T5 (untreated plots). The pest population of jassid, aphid and white fly also decreased gradually after each spray except control treatment. The post treatment observations were taken after 48 hours each spray respectively. The results indicated that the lowest mean pest population of Jassid (1.84), aphid (2.07) and white fly (0.31) per leaf was recorded on T1 (Biosal application), follow...
SUCCESSION OF MAJOR INSECT PESTS IN OKRA, ABELMOSCHUS ESCULENTUS (L.) MOENCH GROWN IN SUMMER
The incidence of whitefly remained low throughout season during summer, 2015. The population aphid showed highly significant negative association with Bright Sunshine Hours (BSS) (r =-0.72**). The higher activity of mite was recorded during 4th week of May. Temperature (minimum, MinT and maximum, MaxT), BSS and Wind Speed (WS) were the important abiotic factors affected the fluctuation of mite population. The activity of Earias vittella Fab. as fruit borer was highly correlated with BSS (0.83**), WS (0.74**), MaxT (0.79**) and MinT (0.85**). Spiders, universal predator showed significant positive association with MaxT (0.59*) and MinT (0.72**). Correlation study between/among various insect pests indicated that aphid had significant association with the activity of leafhopper (r = 0.60*). Whereas, E. vittella showed highly significant positive association with mite (0.74**).
Impact of bio-intensive management strategies for major pests of okra
Okra is an important vegetable crop grown throughout the year in India. The productivity of okra in India is low compared to other countries due to yield losses caused by insect pests, diseases and nematodes. The crop is attacked by more than 72 insect pests and infests the crop from seedling to harvest stage. Field study was undertaken at Krishi Vigyan Kendra, Thirupathisaram, Kanyakumari District, Tamil Nadu, India at 10 acres crop area in five different villages farmers field to demonstrated the bio-intensive integrated management practices. Findings of the study revealed that the major pests of okra fruit borer damage (1.40 % in FLD as compared with 17.10 % in check), leaf hopper population (2.79 nos. / leaf in FLD and in check 16.30 nos. / Leaf) were reduced in recommended practices than farmers practices.
Succession of Major Pests and Predators in Okra (Abelmoschus esculentus (L.) Moench) Ecosystem
International Journal of Current Microbiology and Applied Sciences, 2021
Okra (Abelmoschus esculentus L. Moench) is an important commercial crop in India which plays a key role in national economy. India is the biggest producer of okra ranked first in the world (72.9% of the total world production) with 0.53 million ha area, 6.35 million tones production and a productivity of 11.96 t/ha (Anonymous, 2017a). In Assam, the crop is grown in an area of 12.11 thousand ha with an annual production of 191.70 thousand metric tonnes (Anonymous, 2017b). The state is contributing approximately 3.15 per cent of the total production of okra in the country, which is very low compare to other leading states. Despite large area and quite a good number of cultivars, the supply of okra in Indian market is not matching to its demand. The productivity of okra is low due to many factors and one of the most important constraint in production is the attack of insect pests. Okra is attacked by a number of insect pests, which are the major problems in getting higher yields (Kumar...
Journal of entomology and zoology studies, 2017
The present research was aimed to study the seasonal incidence of major sucking pests and their natural enemies on okra, Abelmoschus esculentus (L.) Moench under field conditions at Department of Entomology, S.K.N. College of Agriculture, Jobner, Rajasthan during kharif, 2014. The crop revealed that two sucking pests viz., jassid, Amrasca biguttula biguttula (Ishida) and whitefly, Bemisia tabaci (Genn.) appeared as major sucking pests. The incidence of jassid and whitefly was first commenced in the second week of August and reached to peak (16.50 jassids and 18.80 whiteflies per three leaves) in the third week of September, at 34.5 C maximum temperature, 22.1 C minimum temperature, 71.0 per cent relative humidity, thereafter, the insect population started declining. The correlation studies revealed that the infestation of jassid and whitefly on okra crop showed non-significant correlation with maximum temperature (r = -0.02 and -0.03), minimum temperature (r = 0.30 and 0.33) and rai...
Indian Journal of Agricultural Sciences
The agro climatic conditions of Andaman and Nicobar islands are extremely suitable for the cultivation of variety of crops. Andaman and Nicobar Islands are group of islands located between 92-94 o E longitude and 6-14 o N latitude in the Bay of Bengal. In these islands, tropical and humid climate offers congenial environment for spread and multiplication of diseases and pest of varied origin. Intensive agronomic practices and indiscriminate use of insecticides has disrupted the delicate balance between the insect pests and their natural enemies. Okra (Abelmoschus esculentus Moench) or bhindi or lady finger has special status in Island in providing nutrition among the varied vegetables and this is the only vegetable which can be grown throughout the year. The yield and quality of okra is hampered severely due to outbreak of various insect pests. IPM is thus important with a view to reduce undesired use of pesticides. Different workers have tested wide range of pesticides across the c...
Influence of natural enemies on suppression of insect pests and yield of okra
Journal of entomology and zoology studies, 2017
The present experiment on influence of natural enemies on suppression of insect pests and yield of okra was conducted at Latif Farm, Sindh Agriculture University, Tandojam from July to October 2011. The results of study revealed that reduction of jassid, whitelfy, thrip mealy bug per leaf and spotted bollworm per plant were recorded before and after release of natural enemies. The overall mean population of jassid (7.61 ± 0.97), whitefly (5.89 ± 0.85), thrip (5.22 ± 0.80) and mealybug (1.85 ± 0.48) per leaf while spotted bollworm (0.76 ± 0.30) per plant was recorded before release of natural enemies. The results further showed that in control (T2) plot more population of pests was recorded population than treated plot (T1). The data showed significant effect of releasing natural enemies on population reduction of pests, biological control also increased the yield and income of okra almost five times compared with untreated control.