Though soursop timber are comparatively straightforward to maintain and normally do not require a variety of upkeep, they’re fairly troublesome to get pollinated if left executed naturally. That is why many growers hand pollinate the flowers. This isn’t solely to extend the fruit set price but additionally to enhance the form of the fruits and their high quality.

However as somewhat facet observe, so I heard that bees do not appear to love to pollinate the guayabana (soursop) flowers. It is the beetle or one thing after they get pollen sticking round their physique in a single flower after which go pollinate different soursop flowers.

Anyway, allow us to take a look at the best way to pollinate the soursop timber now.

Selecting A Soursop Flower for Pollen

To pick a flower for pollen, it is best to search for these which can be close to the highest of a smaller department or the flower itself is of a small measurement. It’s because these flowers are comparatively tougher to get fertilized or even when so the fruit dropping price is excessive or at instances fruits do not get developed in any respect. Which suggests, though they won’t be good candidates for fruit bearing, they might good pollen donors.

Take a look at these flowers which have their three petals barely open outwards. Gently elevate open one petal to have a look inside. When you see that the anthers are calmly darker and they’re starting separate, we will minimize the flowers to gather the pollen.

One of the best time to choose the flowers is within the cool afternoon. After choosing the entire flowers, we will lay them on a bit of paper in an hermetic field or just a paper bag to guard them from moisture loss or the wind blowing the pollen away. We will do the pollination tomorrow morning.

The following morning, you possibly can break off the flower petals of the collected flowers. Shake the flowers somewhat bit so the darkish grey anthers fall onto the piece of paper.

You possibly can then use a dry cotton swab or Q-tip to softly rub the pollen out of the pollen sac (anthers). Normally, the pollen from one flower can be sufficient to pollinate 6-8 different flowers.

Now we will get on to:

Selecting A Flower to Pollinate

To decide on a flower for pollination, you possibly can search for these on the primary soursop trunk. As somewhat enjoyable reality, these fruits that develop straight on the soursop trunk are sometimes the perfect and sweetest.

We will additionally search for flowers on huge branches, with huge flower stems or with no pests or illnesses for an excellent pollination.

Some growers select flowers close to the bottom of a department or close to the bottom of a fork department (like close to the assembly level on the letter Y) and never too far out from the primary trunk. As a result of a soursop can weigh as much as 4-7 lbs (1-3 kg) per fruit, that is so the department would not should droop or bend down approach an excessive amount of when bearing the fruits.

soursop-buds-on-the-trunk

Soursop flowers on a trunk | Picture by:Tu7uh

While you see that the three flower petals are barely open, the stigma could also be of age and mature. Gently open the petals to see the stigma inside. If it appears moist and slimy, we will start the pollination.

Let’s Get to Pollinating

One of the best time to pollinate is round 8-9 AM within the morning. Simply as effectively, the stigma of the female-stage flower is most receptive from 8-10 AM. In full bloom time, we will hand pollinate the flowers each 3-4 days.

While you do the pollination, you should use the index and center finger to sort of maintain the flower stem securely in place (like when somebody is holding a form of cigarette, though this may not be an excellent analogy for these of you who’re non-smokers). However anyway then, use your thumb to barely open one flower petal – anybody is ok.

Then however, with a cotton swab in hand, dab somewhat pollen on. It’s okay to dip the cotton swab head a bit in water. This could improve the pollen sticking price.

Then, gently unfold or rub the pollen onto the stigma. It might be higher if the pollen is unfold evenly throughout. Repeat this 3 times. The fruit will develop even and never too deformed or bizarre wanting.

If there’s a flower rising between two little fruits which have already set on the department and also you wish to pollinate it, simply be somewhat additional cautious although. With a skillful pair of fingers, it is okay.

Nonetheless, if it is one in every of your first few instances doing the job of a bee, then chances are you’ll wish to depart that sandwiched in-between flower alone. Some poking and drilling right here and there may disturb the neighboring new fruits, inflicting them to drop. It might be an actual waste.

After Pollination

After pollination, simply depart the flowers as-is and do not contact them. About 4-7 days after hand pollinating the flowers, you possibly can have a test on the flower stem (or pistil).

If it seems to be nonetheless inexperienced and appears to have grown somewhat larger, then congratulations this implies the pollen takes and our pollination course of is full. We will then look ahead to the soursop fruit to type.

In one other case, if the pollination is not profitable, the flower stem will flip extra darkish, dry up and finally fall off. Higher luck subsequent time. We cannot have any soursop to get pleasure from this time.

Additionally, if a female-stage flower has been pollinated, it would nonetheless develop and change into a male-stage flower and develop anthers (with pollen). Some growers, somewhat bit greedily talking, nonetheless exit and acquire the pollen on these flowers. It sadly causes the flowers to drop. So no fruits nor pollen.

So when you might have pollinated a flower simply depart it as-is and do not go for extra pollen. You possibly can tie some form of string or break off a small piece of the flower petal for marking which flower has receieved pollen. It might be a safer guess.

After the male stage, some pollinated Annona flower petals will dry up and switch extra darkish. Some growers thought that these darkened flowers have been useless and due to this fact plucked them off.

However earlier than you achieve this, have somewhat sneak peak inside. If there appears to be somewhat fruit rising inside, then the pollination takes. The flower petals turning darkish and dry after the 2 levels are regular. That is partly why you’d have a greater likelihood of figuring out by wanting on the flower stem or pistil (it could develop larger and extra woody). So simply be certain to take a look in the fitting place so you do not waste any younger new-forming fruits.

The Fruit

If the soursop tree is hand pollinated, the fruit set price will usually be a lot larger. With a skillful pair of fingers, the profitable fertilization price could possibly be round 80-90%.

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