Indian jujube known as ber (Ziziphus mauritiana Lam.) is an extremely drought hardy and native fruit of India. However, the quality of fruits and productivity is not obtainable up to the standard. One of the reasons for it is infestation of insect pests on the vegetative as well as developing fruits, which ultimately leads to significant yield loss and quality attributes of the fruits. Though as many as 130 species of insect pests have been recorded in India, only few species have attained the pest status and cause substantial economic damage to ber. A total of 12 insect-pests infesting on ber have been recorded from hot arid region of Rajasthan. Out of these, three insects viz., Ber fruit fly (Carpomyia vesuviana Costa), fruit borer (Meridarchis scyrodes) and stone weevil (Aubeus himalayanus Voss) were recorded as major pests with high infestation rate, whereas two insects (Ber butter fly, Tarucus theophrastus (Fabricius) and thrips, Scirtothrips dorsalis (Hood)) were recorded as moderate pests. As many as seven insect pests viz., grey weevil, Myllocerus dentifer (Fabricius), M. blandus Faust, Amblyrrhinus poricollis Schoenherr; leaf webber, Synclera univocolis; ber mite, Larvacarus transitans, bark eating caterpillars, Indarbela sp and termite, Odontotermes sp were recorded as minor pests. The incidence of fruit fly (C. vesuviana), fruit borer (M. scyrodes) and stone weevil (A. himalayanus) were recorded on ber from October to February. The fruit fly infests most of the Ziziphus species grown in the world and cause severe yield loss up to 80% or even more. The average percent incidence of stone weevil, A. himalayanus was observed between 13.00 to 64.00 in fallen fruits and 12.00 to 59.33 on attached fruits of ber. The seasonal incidence of fruit borer, M. scyrodes attained its
Plants are persistently confronted to both abiotic and biotic stresses that drastically reduce their productivity. Plant responses to these stresses are multifaceted and involve copious Biochemical, physiological, molecular, molecular and cellular adaptations. Recent evidence shows that simultaneous occurrence of abiotic and biotic stress can have a positive effect on plant performance by reducing the susceptibility to biotic stress which is a positive sign for arid horticulture crops. Some of these adaptations specifically biochemical adaptations become the source of plant defense mechanisms against biotic stresses like insect"s pest and diseases. These biochemical adaptations/mechanisms includes production of secondary metabolites of plant defense against the biotic stresses especially against insects are wide spread and highly dynamic, and are mediated the response directly or indirectly in arid horticultural crops. Production of secondary metabolites viz. terpenes, phenolics, flavonoids, alkaloids, N & S containing compounds is constitutive as well as inducible through mild stress caused by insect damage to plants which leads to affect the feeding, growth and survival of the insect. Quality and quantity of constitutive secondary metabolites production is species as well as cultivar specific and can be expressed as signature of particular plant or species and leads to the phenomenon of host-plant interaction or host-plant resistance. This phenomenon of host plant resistance to insect can be exploited for development of crop cultivars which readily produce the inducible response upon mild infestation and can perform as one of the of integrated pest management for sustainable arid horticulture crop production. This review presents overviews about these constitutive and inducible responses towards biochemical adaptations in arid horticulture crops to protect themselves against insects.
African pumpkin (Momordica balsamina L.) is a tendrilled, wild-type vine plant with a wide range of therapeutic and nutritional properties that has been used as a conventional medicament in many countries. Alkaloids, resins, glycosides, flavonoids, saponins, cardiac glycoside, steroids and terpenes are found in the plant's fruits, seeds, leaves and bark, and they have varied medicinal properties viz., anti-bacterial, anti-diarrheal, anti-plasmodial, anti-septic, anti-inflammatory, anti-microbial, antioxidant, hypoglycemic, analgesic, and hepatoprotective activities. 'Momordin,' a therapeutic agent, can stop HIV and other viruses from multiplying. The leaves are also a good source of nutrients because they contain 17 amino acids and minerals like potassium, magnesium, phosphorus, calcium, sodium, zinc, manganese, and iron. It also aids in the fight against soil micronutrient deficiencies and high protein and fat content with low fibre content. High potassium content is an excellent source for controlling hypertension and other cardiovascular disorders. This plant may be a protein supplement for poor rural people's cereal-based diets. The medicinal and nutritional value of this wild herb for health care management is discussed in this review.
The present study was carried out to identify low grain phytate containing pearl millet parental lines amongst advanced inbred lines and designated Bline (counterpart of CMS lines) . A total number of 92 lines (46 each of inbreds and designated B line) were grown in a randomized block design with two replications during kharif-2013 and 33 selected (14 inbreds and 19 designated B-lines) from kharif-2013 were grown in kharif-2014 as well. Analysis of variance indicated significant differences between the tested genotypes during both the seasons. the phytate content varied from 4.45 to 6.80 mg/g and 1.31 to 6.19 mg/g during kharif-2013 in advanced inbred lines and designated B-lines respectively. Almost similar results were observed during kharif-2014, except the like with 1.31 mg/g phytate content during kharif-2013 was not stable and in kharif -2014, the phytate content for this line was 6.87 mg/g. Since none of the genotype screened showed low phytate content, therefore a large number of breeding lines are needed to be tested to know their genetic potential for low phytate.
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