Comparative Resistance as Function of Physical and Chemical Properties of Selected Faba Bean Promising Lines against Callosobruchus maculatus Post Harvest

Abstract

The present investigation was conducted during two growing seasons 2015/2016 and 2016/2017 at Sakha Agricultural Research Station farm, in order to evaluate thirteen faba bean genotypes to physical and chemical properties against insects attack to faba bean seed from breeding program, under early and late sowing dates (mid-October and mid-November, respectively) comparing with three varieties were assessed to study their response to infestation with Cowpea weevil Callosobruchus maculatus post-harvest through storage under laboratory conditions. Susceptibility index (SI), Seed yield /plant as well as net weight after discarding the all negative factors which affect the final yield were taken as gauge of susceptibility of studied lines. Actually, the results indicated that the studied lines greatly differed to the attack of C. maculatus. According to (SI)i.e. the line with high values of SI, high number of progeny, weight losses and shorter life cycle were classified as susceptible. In contrast, the lines with intermediate S.I (5.1-7.5) and revealed lower number of adults emerged (lower, weight loss and longerlife cycle were considered tolerant or moderately resistant (MR). The results clearly indicated that the complete resistant lines were relatively absent. Furthermore, appositive relationship was fond between the physic-chemical characters and infestation with C. maculatus. According to S.I, seed yield/plant, net weight the lines 2 and 16 were the most tolerant, while line 14 and 4 were the most susceptible one. In addition, that the mid October was the suitable sowing date where it actualized the higher seed yield along the two planting seasons. Based on the highest net weight %, the line 2 and Sakha3 may be recommended to plant at mid-October and for storage at long periods where they were tolerant against the tested beetle in storage, some diseases in field and climatic sowing. In order to early maturity character, the promising breeding line 2 as an early mature faba line that characterizes with tolerant to insect infestation along with high yield potential, especially under the stresses associated with early sowing date. Therefore, it should be taken into consideration to select the promising line 2 for faba bean breeding program to improve productivity and tolerance to insect infestation to avoid insecticide usage. In conclusion, this investigation showed the importance of physical and chemical properties for protects the seeds of faba bean against the insect attack.

Varietal susceptibility of certain broad bean seeds to infestation with Callosobruchus maculatus (F.) and Callosobruchus chinensis (L.) (Coleoptera: Bruchidae)

“…maculatus , while the least susceptible variety was Giza 716 in free- choice method . These results are in agreement with the findings of El- Rodeny et al (2018) on other broad bean genotype who indicated that Sakha 3 genotype of broad bean was tolerant to the infestation with C . maculatus in storage since it had low number of progeny and short developmental period.…”

“…maculate , while the least susceptible one was Giza 716 in free- choice method . These results partially agreed with that recorded by El- Rodeny et al (2018) who found that the broad bean line 2 and Sakha 3 were tolerant against C . maculatus in storage.…”

“…maculatus depends on varieties of legume seeds. El- Rodeny et al (2018) found that the tolerant broad bean genotypes to infestation with C. maculatus exhibited the reduced rate of susceptibility index value and weight loss%.…”

“…Meany authors studied the susceptibility of different legume varieties to infestation with some storage insect pests such as Duan et al (2014) on C . chinensis ; Osman et al, 2015 , El-Rodeny et al, 2018 on C . maculatus ; Mahmoud (2020) on Bruchidius incarnates (Boh.).…”

Physicochemical Properties of Sugarcane Cultivars Affected Life History and Population Growth Parameters of Sesamia nonagrioides (Lefebvre) (Lepidoptera: Noctuidae)

“…The quality of host plants can influence the life history, population growth, oviposition preference, and feeding performance of insect pests [ 22 , 23 ]. Plant physicochemical properties including primary and secondary metabolites, as well as trichome density, tissue hardness, and moisture content can determine the oviposition behavior and population performance of insect pests [ 24 , 25 , 26 , 27 , 28 ]. Therefore, study of these parameters, as resistance indices, could be useful in the identification of resistant cultivars for use in IPM programs [ 29 , 30 , 31 , 32 ].…”