Rodents are common prey for a wide range of predators, including reptiles, birds, and mammals. Some of the predators (e.g., owls) depend solely on rodents for food, reducing their population significantly. Rodents respond to predators by changing behaviours to protect themselves against the enemies. Further, rodents have evolved advanced sensory capabilities that enable them to detect and effectively respond to predator cues to enhance their chances of survival. If rodents can detect their predators by chemical communication, these compounds can be extracted to repel rodents away from foods in farms and houses. However, the scientific community lacks knowledge of this phenomenon. Thus, we have reviewed the literature to get enough evidence to prove that rodents respond to predators by chemical communication. Our findings demonstrated that rodents react immediately to predatory threats by hiding or sleeping, exhibiting rapid eye movements, grouping, increased alertness, aggression, heightened anxiety, reduced activity, freezing, and avoidance. Furthermore, prolonged exposure to these cues can lead to gene changes and trigger the release of stress hormones such as corticosterone. Stress in rodents can cause hormonal imbalances, leading to decreased reproduction or smaller than normal litters. This knowledge can be used to develop alternative methods for rodent control, which can reduce reliance on poisons and promote eco-friendly and sustainable approaches to managing rodent populations. However, the majority of these ant-predatory responses have only undergone laboratory testing, providing limited field-based information. Therefore, further studies are recommended to investigate ant-predatory responses, especially those involving chemical communication, in real-world environments.

Non-immunological responses are important alternative strategies for animals to deal with pathogens. It has long been recognized that fecundity compensation and production of winged offspring are two common non-immunological responses used by aphids when confronted with predators or pathogens. However, the effects of host plant on these responses have received little attention. This study investigated the effects of host plant on non-immunological defense in the pea aphids, Acyrthosiphon pisum, after bacterial and fungal infections. The aphids were raised in two groups, with one group being raised on broad beans and the other group being raised on alfalfa. The secondary symbiont background was examined, and the aphids were then infected with bacteria and fungus to assess fecundity and winged offspring production. We found that aphids that had been fed alfalfa had fewer offspring than those fed broad beans. Alfalfa-fed aphids produced more winged offspring in response to S. aureus and B. bassiana infections. Our findings suggest that the host plant plays a key role in fecundity and winged offspring production in pea aphid colony.

The objective of the study was to evaluate the efficaciousness dosage of aqueous extracts of neem (Azadirachta indica Juss) and aloe vera (Aloe barbadensis Miller) at different concentrations (40%, 60%, and 80%) against adult melon flies (Bactrocera cucurbitae Coquillet) and aphids (Myzus persicae Sulzer) in laboratory conditions. The experiments were designed and conducted from April to June 2023 at Sokoine University of Agriculture, Tanzania. The study found that as extract concentrations increased, there was a noticeable drop in insect survival. The dosage of 80% at 48 hours and 60% at 72 hours were observed to perform better as few were observed to survive. At the highest dosage of 80% and 60%, extracts from neem and aloe vera both resulted to 100% insect mortality. The results highlight the potential of aloe vera and neem extracts to have a positive effect on insect pest management rather than untreated crops.

Background: Toxoplasmosis is among the globally neglected zoonotic diseases caused by Toxoplasma gondii. Humans get infected after ingesting or coming into contact with oocysts from the feces of infected cats. Illiteracy about the infection is one of the significant risk factors for its transmission. The study aimed to determine the community knowledge, attitudes, and practices that influence toxoplasmosis transmission in Unguja Island, Zanzibar, Tanzania. Methods: The study used a cross-sectional design, which was done from February to April 2023. Semi-structured questionnaires collected data on 139 respondents' demographics, practices, knowledge, and attitudes regarding toxoplasmosis. The chi-square test was used to assess the statistical association between variables at a p-value of < 0.05. Results: Out of 139 recruited respondents, only 18.0% of respondents were aware of Toxoplasmosis. The study revealed several risk factors for Toxoplasmosis transmission, whereby 63.1% of the cat owners didn't deworm their cats regularly, 70.8% didn't clean the cat kennels, and 53.1% didn't wash their hands after cleaning kennels and touching a cat. Furthermore, out of all respondents, about two-thirds didn't drink treated water and 87.8% ate raw vegetables as salads. The study revealed both negative and positive attitudes concerning Toxoplasmosis, where 64.7% of respondents thought that cats cannot transmit pathogens to humans and 66.2% did not agree with people interacting with stray cats, respectively. There was an association of awareness of the disease's existence with high education levels (P value = 0.001) and sex (females) (P = 0.002). Conclusion: The study revealed a low awareness of the existence of the infection despite the higher interaction of cats with humans in the study area. We recommend the provision of public health education focusing on how the disease is transmitted, the relationship of the disease with cats, the management of cat feces, clinical signs of the disease, its treatment, and control.

Seasonal aromatic Lamiaceae shrub Ocimum suave has insecticidal and therapeutic bioactive compounds. The plant's phytochemical profile and effective solvents for extraction have limited information, despite its potential as a sustainable pest management alternative. The phytochemical composition and quantification of solvent-extracted Ocimum suave leaves, stems, roots, and combined samples were examined. The plant samples were obtained at Dakawa-Mvomero. A laboratory-based experimental design was employed to assess the effect of different extraction solvents on the phytochemical profile and quantification of bioactive compounds in Ocimum suave. A completely randomized design (CRD) was used with three replications to minimize experimental error and increase the reliability of the results. Alkaloids, flavonoids, tannins, saponins, terpenoids, and essential oils were detected in plant samples using methanol, dichloromethane (DCM), n-hexane, and distilled water-extraction solvents. Samples underwent standard quantification chemical tests. Saponins (p=0.027), essential oils (p=0.018), and alkaloids (0.018) showed significant differences. These findings demonstrate that solvent type significantly impacts compound extraction efficiency. Root tannins were concentrated at 3.51mg/l and stem at 3.36mg/l with methanol. Leaf, stem, and root terpenoids were highly concentrated in dichloromethane 7.20% and n-hexane 5.80% extracts. Dichloromethane 6.50%, methanol 6.20%, and n-hexane 6.10% concentrated essential oils from all plant parts. Saponins in roots, stems, and leaves were 5.60% concentrated with distilled water. N-hexane solvent concentrated leaf flavonoids (4.55%) and stem alkaloids (3.25%). The findings emphasise solvent choice in phytochemical yields and suggest Ocimum suave may be an eco-friendly pesticide.

Background: Pea aphids (Acyrthosiphon pisum) possess a weak immune system, but they can firmly mount immunological responses. However, the influence of different plants on their defense against different microbes remains largely unknown. In addition, no previous research has integrated the growth, reproduction, and defense responses of pea aphids feeding on different plants. Objective: This study aims to investigate the growth, reproduction, and defense responses of pea aphids feeding on different plants. Methods: Pea aphids were cultivated on both Medicago sativa and Vicia faba. Growth and reproduction were evaluated. Additionally, we monitored the survival and microbial loads of pea aphids after bacterial and fungal infections. Results : Pea aphids reared on M. sativa had lower growth, lower intrinsic rate of increase, and lower finite rate of increase when compared to aphids feeding on V. faba. The net reproduction was lower in aphids feeding on M. sativa, although the difference was not significant. The mean time of generation and pre-reproductive periods was longer for aphids reared on M. sativa than for aphids reared on V. faba. In the infection experiments, we found that aphid survival was not affected by the host plant. However, aphids reared on M. sativa generally harbored fewer microbial loads than those reared on V. faba. Conclusions: The growth and reproduction of pea aphids are affected by the host plant. Aphids feeding on different plants had different tolerances to microbial infections. Our study sheds light on improving biological control program for aphids.