Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to get rid of bagworms [title] Begin looking for bagworms during the winter or early spring. [step] Bagworm egg sacks are brown and one and a half to two inches (3.8 to 5 cm) long. They are covered with dead needles, so they appear more noticeable in contrast to the green deciduous needles at this time.

Ending1: [substeps] Bagworms can be found in open-wound bags, at natural supply stores or online. Bagworms like to live near ammonia, nitrite, and sulfuric sulphate because these chemicals help keep the worms from entering your system. Ending2: [substeps] Bagworm sacks can be very hard to find because they look like pine cones. Look through your pinecones to find variations that may be bagworms. Ending3: To check for bagworms, simply place your finger into the ear canal and listen for a very low-pitched humming sound. [substeps] If you are using a bagworm egg sack, place the sharp end in the ear canal. Ending4: They are non-porous and create little spikes in the wool. However, during the winter they are much harder to get rid of because of the fact that they have a hard time survival with the shifting temperature (never having any sun).

Answer format: ending1/ending2/ending3/ending4