The penetration throughout the legume can lead to severe damage to the plant quality and thus cause huge economic loss.

The abdomen of the female is slightly longer than the elytra, and it is white in colour with two oval black spots on it.

This species exhibits some sexual dimorphism, with the female being larger and heavier than the male beetle.

The adults are capable of flight and they can disperse to other fields and bean storage sites easily using this method.

In addition, flight forms have lighter colored and larger bodies, which might be necessary to fly and blend in with the environment.

Flight form females also have larger wings, which could be helpful in finding pods to lay their eggs on.

In contrast, flightless forms that emerge from dry seeds in storage have darker and smaller bodies.

[7] C. chinensis displays a cosmopolitan distribution pattern and has been spotted in most countries due to the commercial export of beans.

[2] The beetle's natural ranges are in the tropics and subtropics of Asia, and their population has grown extensively since the cultivation and distribution of legumes.

Their distribution is heavily influenced by human production since they only live on legumes suitable for mating and feeding their larvae.

In general, C. chinensis can feen on any legume type that they can live on, including beans, lentils, chickpeas and split peas.

Mature adults emerge from the bean, biting a neat circular exit from the pod 25 days after hatching.

[4] The total life cycle of C. chinensis ranges from 29 to 39 days depending on different pulses they grow in.

[10] C. chinensis are host to various parasites, including mites that prey on eggs and wasp species that are larval parasitoids.

[14] Male C. chinensis have large genital sclerites located at the end of their intromittent organ.

This is used to transfer sperm more effectively as they act as anchors attaching to the inside of the female genital opening.

The male intromittent organ, when extended, can be almost twice the size of the beetle, but only the tip of it is inserted inside the female during reproduction.

[16] Female courting behavior entails a calling position where it raises its abdomen while tipping the head down.

The production of eggs can be costly because it requires energy and limited resources, which may decrease the life span of females.

In addition, C. maculatus males damage the female genital tract with their genitalia, which are made of a sclerotized spine.

Mating multiple times may produce offspring that are genetically diverse, which is beneficial in environments that change.

This is quite commonly observed in these insects as they are congeneric species of bean weevil with a major niche overlap.

[22][23] C. chinensis also exhibit sexual harassment with males attempting to insert their penis into C. maculatus females.

It was found that the mixture of a specific ratio of these two chemicals from some plants had high attraction toward the beetle of both genders, which reveals potential pest control treatment.

A study looking at the efficiency of parasites as biological pest controls found that parasitoids A. calandrae and L. distingeundus are able to find larvae at least 150 cm away through odor.