Agriculture

3 Types of Insects that the Jerrycan Bean Storage Technique Destroys

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Once farmers harvest beans, they need to figure out effective storage options. With this in mind, the Jerrycan bean storage technique offers a simple, viable option to store beans. The technique involves putting beans into an airtight jerrycan for around 6 months to prevent insect damage. 

For that reason, farmers should carefully follow the step-by-step process involved while conducting the jerrycan bean storage to keep harmful insects at bay. The Jerrycan bean storage hugely cuts down on post-harvest loss and eases things for farmers. In this blog, we will discuss the three types of damage-causing insects that the Jerrycan bean storage destroys, unravel some of their features and explain how they damage bean seeds.

                                                                                  1. Seedcorn Maggot

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These are yellow-white maggots, almost 7 mm long insects that attack bean seeds. Seedcorn maggots lack legs and have a pointed head. They feed on bean contents leading to poor germination. Seedcorn maggots eggs hatch after a few days, and small white maggots emerge and begin to feed on seeds.

Then, the maggots feed for 2 to 3 weeks before metamorphosing into the pupa stage. Notably, pupae do not damage seeds. After around 7 to 14 days, adults emerge from the pupa stage and begin to mate thus setting the stage for the cycle to continue. These insects can hugely inconvenience farmers who store the seeds in preparation for planting.

                                                                                       2. Bean Bruchid

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Otherwise known as the dry bean weevils, these small, ( 3-5mm) long storage beans typically attack dry beans in Africa. The bean bruchids’ color may range from grey, brown to reddish-brown. Also, they have dark hair patches on their wings.  The females lay eggs that stick to the bean seeds and development begins.

After around one month, the adult emerges and feeds on the seeds thus damaging them  or impeding the seed’s germination capability. At this point, the adult then moves out of the seeds leaving small round holes, and this hugely destroys the seeds. 

                                                                                        3. Bean Weevil

As the name suggests, the bean weevil is a classification of seed beetles. Unlike wheat and seed weevil, they are hairy and rounder in appearance with a teardrop-like shape. Also, bean weevil lacks the typical telltale jutting snout found on other weevil species. While they are faint olive in color, they have some noticeable darker shades on wings. While their legs are ruddy, the hind legs are characterized by spiny protrusions. To top its appearance off, the bean weevil’s antennae look reddish. 

Usually, it is difficult for farmers to notice the presence of bean weevils unless empty husks are found within the harvested beans. Female weevils penetrate growing bean pods to lay eggs. Then, at this point, the entry portals are sealed paving way for hairy, white larva inside to begin developing. The new larvae exhaustively feed on the bean till only the husk remains. Upon pupation, the adults then get into the beans in order to emerge thus destroying the beans. 

Final Thoughts

These insects can hugely damage bean seeds thus impeding germination. Therefore, latching onto effective storage options such as the Jerrycan bean storage offers much in the way of destroying harmful insects. 

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